{"title":"Rola-Chem","description":"\u003cp\u003eRola-Chem pool equipment and replacement parts at Active Pool Supply.\u003c\/p\u003e","products":[{"product_id":"flow-switch-for-flow-cell","title":"Rola-Chem Flow Switch for Globe Flow Cell","description":"\u003cp\u003eThe Rola-Chem 550183 is the replacement flow switch for Rola-Chem's globe style flow cell. It is the genuine Rola-Chem part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat it does\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe flow switch proves that water is moving through the flow cell. The controller will only feed chemical while that signal is present, which keeps it from dosing a dead line when the pump is off. A switch that sticks open shuts feeding down; one that fails closed lets the controller feed with no flow.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eBefore you order\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis is the switch on its own, not the flow cell. Confirm your cell is the globe style before ordering.\u003c\/p\u003e","brand":"Rola-Chem","offers":[{"title":"Default Title","offer_id":48625020993748,"sku":"ROL-451-6073","price":151.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0801\/9568\/2516\/files\/default_34469bf2-c841-4f6b-988c-5a82bb4f4b7b.jpg?v=1788662380"},{"product_id":"ph-probe-heavy-duty","title":"Rola-Chem 8 ft Heavy Duty pH Probe","description":"\u003cp\u003eThe Rola-Chem 550135 is the heavy duty pH probe with an 8 ft lead, for Rola-Chem digital and analog controller systems.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat it does\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eA chemical controller decides when to feed acid based entirely on what the pH probe tells it. That makes the probe the accuracy limit for the whole system. When one ages past the point where cleaning and calibration bring it back, the controller keeps dosing confidently on numbers that are no longer true.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eBefore you order\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis is the pH probe, not the ORP probe, and the ORP version is a separate part. The lead is eight feet, so check the run from your probe location back to the controller.\u003c\/p\u003e","brand":"Rola-Chem","offers":[{"title":"Default Title","offer_id":48625792909524,"sku":"ROL-45-914","price":228.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0801\/9568\/2516\/files\/default_fff5a4d0-e63a-41b1-add5-384225c4ae7e.jpg?v=1788700265"},{"product_id":"check-valve-pvc-inj-1-4-npt","title":"Rola-Chem Injection Check Valve, PVC, 1\/4\" NPT","description":"\u003cp\u003eThe Rola-Chem 521170 is a PVC injection check valve for peristaltic chemical metering pumps. It sits at the injection point where the feed line meets the plumbing.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat it does\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eA metering pump pushes small doses of chemical into a pressurised return line. When the pump stops, that pressure wants to go back the other way. The check valve is what stops it, keeping pool water and chemical out of the feed tube and out of the pump head. It is a small fitting doing a job that protects a much more expensive one.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCheck the connection before ordering\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe supplied data describes this valve two different ways. The product title gives 1\/4 inch NPT; the detailed description gives 3\/8 inch barb by 1\/4 inch barb. We have listed both rather than choosing one for you. If the fitting size is critical, measure what is on the system now or get in touch and we will confirm.\u003c\/p\u003e","brand":"Rola-Chem","offers":[{"title":"Default Title","offer_id":48626288001236,"sku":"ROL-451-1170","price":41.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0801\/9568\/2516\/files\/521170.jpg?v=1788707710"},{"product_id":"orp-probe-heavy-duty","title":"Rola-Chem ORP Probe Heavy Duty","description":"\u003cp\u003eThe Rola-Chem 550136 is the heavy duty ORP probe with an 8 ft lead, made for Rola-Chem digital and analog controller systems.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat it measures\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eORP, oxidation reduction potential, is the reading a controller uses to judge how actively the sanitizer in the water is working. It is a better guide than raw chlorine concentration, because it reflects what the sanitizer is actually doing. The controller feeds chemical based on that number, so the probe is the piece the entire automated loop depends on.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen to replace it\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eProbes are consumables. The sensing element slowly loses response, readings drift, and calibration stops holding. Once a probe will not stay calibrated after cleaning, it is done, and the controller is dosing on bad information until it is replaced.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eNote on the pair\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eORP and pH are read by separate probes. If your controller manages both, this listing covers the ORP side only; the matching 8 ft heavy duty pH probe is a separate Rola-Chem part.\u003c\/p\u003e","brand":"Rola-Chem","offers":[{"title":"Default Title","offer_id":48626478153940,"sku":"ROL-45-915","price":237.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0801\/9568\/2516\/files\/default_77d0a6a7-e2a2-4103-baae-625add9a7dd7.jpg?v=1788710690"},{"product_id":"flex-tube-w-clamp-8","title":"Rola-Chem 8\" Tygon Pinch Tube Assembly with Clamp for RC301 Peristaltic Pump","description":"\u003cp\u003eRola-Chem 523250 is the eight inch Tygon pinch tube assembly, complete with its clamp, for the RC301 peristaltic chemical feed pump. It is the genuine part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow a peristaltic pump works\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThere is no impeller and no seal touching the chemical. A rotor squeezes a flexible tube against the pump head and pushes the liquid along inside it. That is what makes these pumps tolerant of aggressive chemistry, and it is also why the tube is the part that wears out.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy it is a scheduled item\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe tube is compressed and released thousands of times an hour. Eventually it takes a set, loses its recovery, and then splits. When that happens the pump keeps running and sounds completely normal while no chemical reaches the pool, which is the failure that costs people a week of bad water before anyone checks the feeder. Change the tube on a schedule instead of waiting for it.\u003c\/p\u003e","brand":"Rola-Chem","offers":[{"title":"Default Title","offer_id":48627842253012,"sku":"ROL-451-6084","price":24.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0801\/9568\/2516\/files\/default_24ac94ae-0c47-4eed-bdb9-46826dca0738.jpg?v=1788728117"},{"product_id":"check-valve-asy-inline","title":"Rola-Chem 3\/8\" B PVC Inline Check Valve Assembly","description":"\u003cp\u003eThe Rola-Chem 521160 is an inline check valve assembly in PVC, sized 3\/8 inch B. It is sold as a complete assembly, so there is nothing to build up before it goes in.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat a check valve is for\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eA check valve lets flow move one way and shuts against the other. Fitted inline, it keeps whatever is downstream from draining or siphoning back the way it came when the line goes quiet.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eOrdering\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eMatch the part number, 521160, and the 3\/8 inch B size against the valve you are replacing. Note the direction of flow before removing the old assembly so the new one goes in the same way round.\u003c\/p\u003e","brand":"Rola-Chem","offers":[{"title":"Default Title","offer_id":48627851362516,"sku":"ROL-451-6074","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0801\/9568\/2516\/files\/default_d782bcb7-c519-4f75-9db2-3f451263b9ab.jpg?v=1788728303"},{"product_id":"vinyl-tubing-4375x-per-ft","title":"Rola-Chem 7\/16\" Vinyl Tubing for Chemical Feeders","description":"\u003cp\u003eRola-Chem 520116 is the vinyl tubing used on chemical feeder installations, listed at 7\/16 inch, or 0.4375 inch.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow it is sold\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eBy the foot. The price on this page is for a single foot, so set the quantity to the number of feet your run needs and it comes as one length. That avoids paying for a coil you will not use on a short run, and avoids splicing on a long one.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eOn the job\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eFeed tubing is a wear item on any chemical installation. Lines stiffen, discolor and eventually crack where they flex, and a cracked feed line is a dose that never reaches the water. Replacing the run is cheap and takes minutes.\u003c\/p\u003e","brand":"Rola-Chem","offers":[{"title":"Default Title","offer_id":48627904282836,"sku":"ROL-451-6117","price":8.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0801\/9568\/2516\/files\/RC520116.jpg?v=1788729732"},{"product_id":"injection-ftg-plastic","title":"Rola-Chem 7\/16 in. Plastic Tube Injection Fitting for Pro Series 300 Pump","description":"\u003cp\u003eRola-Chem 527159 is the plastic injection fitting for 7\/16 in. tube on the Pro Series 300 chemical feed pump.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhere it goes\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe injection fitting is the connection at the far end of the feed line, where the tube from the pump meets the plumbing and the chemical enters the water. It is the point that sees the most concentrated chemical, so it is a routine replacement item on a feeder that has been in service a while.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFitment\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eIt is sized for 7\/16 in. tube on the Rola-Chem Pro Series 300. Confirm your tube size before ordering, since a feeder that has been serviced before may not still be on its original tube.\u003c\/p\u003e","brand":"Rola-Chem","offers":[{"title":"Default Title","offer_id":48628831486164,"sku":"ROL-451-6108","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0801\/9568\/2516\/files\/default_6cf7ccb5-57e5-4805-8164-f504a769f3bb.jpg?v=1788753615"},{"product_id":"paradise-pool-sentry-autofill","title":"Rola-Chem Paradise Pool Sentry Autofill","description":"\u003cp\u003eThe Rola-Chem Paradise Pool Sentry autofill, part M-3000, is an automatic water leveler. It keeps the pool at its working level so the job does not fall to a hose and someone remembering to turn it off.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy the level is worth automating\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eEvaporation, splash out and backwashing all pull the surface down, and the pool does not wait for a convenient moment. Once the water falls below the skimmer mouth the pump begins drawing air, which is how a system loses prime and how a shaft seal ends up running dry. An autofill catches that before it becomes a service call.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eThe side benefit\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eA pool that holds its level also holds its volume, and a stable volume is what makes dosing predictable. Chemistry that keeps drifting after every top up is often just a pool whose water level swings.\u003c\/p\u003e","brand":"Rola-Chem","offers":[{"title":"Default Title","offer_id":48628858159316,"sku":"PDR-56-3000","price":92.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0801\/9568\/2516\/files\/default_f48110ea-1e4f-4aed-b356-f4f4d1fa8a35.jpg?v=1788755519"},{"product_id":"digital-controller-manifold","title":"Rola-Chem Digital Control Manifold Filter Kit","description":"\u003cp\u003eThe Rola-Chem 550591 is the digital control manifold filter kit, the replacement manifold assembly for a Rola-Chem digital chemical controller.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhere it sits in the system\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eA chemical controller reads the water and decides when to feed. The manifold is the wet plumbing that feed passes through, which means it lives in contact with sanitizer or acid every time the unit runs. That is the part of a feeder system that ages first: fittings harden, seals lose their grip, and the assembly starts to weep at the joints instead of holding pressure.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eBefore you order\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis is ordered by part number. Our facts for this kit do not carry a model by model fit list, so check 550591 against the manifold on your own Rola-Chem unit rather than going by the description alone.\u003c\/p\u003e","brand":"Rola-Chem","offers":[{"title":"Default Title","offer_id":48629109260500,"sku":"ROL-451-0591","price":82.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0801\/9568\/2516\/files\/default_2df927dc-7468-4da2-a241-6fbac99862b5.jpg?v=1788759763"},{"product_id":"flowmeter-6-pvc","title":"Rola-Chem 6\" PVC 400-1050 GPM Top Mount Flowmeter","description":"\u003cp\u003eThe Rola-Chem 570391T is a top mount flowmeter for 6 inch PVC, scaled to read 400 to 1050 GPM.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhere it goes\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe meter installs into the top of the pipe, which puts the scale where an operator can read it while walking the equipment pad. Rola-Chem builds these to work with schedule 40 PVC pipe and to be compatible with practically every existing flowmeter, so replacing an older unit does not usually mean replumbing.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDuty\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe meter is rated for water temperatures up to 200 degrees F, well past anything a pool circulates, which is what lets it live on heated commercial systems without the body going soft.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy flow readings matter\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eTurnover rate, heater performance, chemical feed and filter backwash all depend on knowing the real flow rather than the flow the pump was rated for on paper. A meter that has clouded or clogged tells you nothing useful, and a system running blind is one where a partially blocked filter goes unnoticed for weeks.\u003c\/p\u003e","brand":"Rola-Chem","offers":[{"title":"Default Title","offer_id":48633666044116,"sku":"ROL-56-6170","price":185.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0801\/9568\/2516\/files\/default_729b216d-b989-4e23-95a7-7a187a1ee490.jpg?v=1788808429"},{"product_id":"crane-washer","title":"Rola-Chem 7\/16\" Crane Washer for Pro Series 300 Pump","description":"\u003cp\u003eThe Rola-Chem 525113 is a 7\/16 inch crane washer listed as a replacement part for the Rola-Chem Pro Series 300 pump.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eOrdering the right one\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eFeeder washers are hard to identify once they are out of the machine, and close sizes are easy to confuse. Match the part number, 525113, and the 7\/16 inch size rather than comparing the old part by eye.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWorth stocking\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eSmall sealing parts on a chemical feed pump are consumable. They harden, flatten and eventually weep, and the pump is usually needed on the day the leak appears. Owners commonly pick up the 7\/16 inch plastic injection fitting for tube for the same pump at the same time, which is ordered separately.\u003c\/p\u003e","brand":"Rola-Chem","offers":[{"title":"Default Title","offer_id":48634266452180,"sku":"ROL-451-6100","price":6.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0801\/9568\/2516\/files\/default_f06704fc-a91f-41d9-96be-d32212d5c6a4.jpg?v=1788827919"},{"product_id":"flowmeter-2-1-2-pvc","title":"Rola-Chem 2.5 Inch PVC Top Mount Flowmeter, 70 to 240 GPM","description":"\u003cp\u003eThe Rola-Chem 570361T is a top mount flowmeter for 2.5 inch PVC pipe, reading 70 to 240 gallons per minute.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy a flowmeter\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eFlow rate is the number behind turnover, heater performance and filter sizing, and on a commercial pool it is usually what an inspector asks to see. A meter reading nothing, or reading obviously wrong, makes every one of those judgments guesswork. That is the point at which a clouded or clogged unit gets replaced.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFitting and range\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe meter is built for schedule 40 PVC pipe and is constructed to withstand water temperatures up to 200 degrees F. Check the range against your system before ordering, since a meter reading 70 to 240 GPM tells you nothing useful on a pool moving 40. Rola-Chem builds the same size in a vertical mount version, so pick the orientation that lets you actually read the face where the meter will sit.\u003c\/p\u003e","brand":"Rola-Chem","offers":[{"title":"Default Title","offer_id":48634279035092,"sku":"ROL-56-6167","price":81.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0801\/9568\/2516\/files\/default_6c76537c-ab12-451c-9b1a-f951413b2453.jpg?v=1788828041"},{"product_id":"flowmeter-2-1-2-vertical","title":"Rola-Chem 2.5 Inch PVC Vertical Mount Flowmeter, 70 to 240 GPM","description":"\u003cp\u003eThe Rola-Chem 570361V is a vertical mount flowmeter for 2.5 inch PVC pipe, reading 70 to 240 gallons per minute.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eMount orientation\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eTop mount and vertical mount meters measure the same thing. What differs is how the body sits on the pipe and therefore the angle you read it from. On a crowded equipment pad that is not a detail, it is the difference between a number you can check at a glance and one nobody looks at.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eRange and construction\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe meter reads 70 to 240 GPM, works with schedule 40 PVC pipe and is constructed to withstand water temperatures up to 200 degrees F. Match the range to your system before ordering. Rola-Chem builds these to be compatible with practically every existing flowmeter and to be serviced rather than discarded, which is why a clouded or clogged old unit is worth replacing with one.\u003c\/p\u003e","brand":"Rola-Chem","offers":[{"title":"Default Title","offer_id":48634279067860,"sku":"ROL-56-6173","price":77.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0801\/9568\/2516\/files\/default_4e338792-b5c8-47e2-a812-38e01369953a.jpg?v=1788828046"},{"product_id":"flowmeter-2-pvc-top-mount","title":"Rola-Chem 2\" PVC 40-140 GPM Top Mount Flowmeter","description":"\u003cp\u003eThe Rola-Chem 570351T is a top mount flowmeter for 2 inch schedule 40 PVC pipe, reading 40 to 140 GPM, or 151 to 530 LPM on the metric scale.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy measure flow\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003ePressure gauges tell you what the filter is doing. Only a flowmeter tells you how much water is actually moving, which is the number that matters for turnover, for heater minimum flow, and for any code that specifies a rate. On a commercial system it is often required equipment. On a residential one it is the fastest way to know whether a variable speed pump is really doing the job at the speed it has been set to.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInstallation\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe meter goes into the top of a horizontal run, so the scale reads upward. Flowmeters need undisturbed water to read honestly, which means a straight length of pipe on both sides of the meter and plenty of distance from elbows, tees and valves. Crowding it against a fitting produces a reading that swings or sits high. Rola-Chem also builds side mount and vertical mount versions of this range for runs where a top mount will not work.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eService\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eIt is rated for water up to 200 degrees F and it is built to be opened and cleaned. When a reading drifts, the sight tube and the float are the first things to look at, because scale and debris will hold the float away from its true position long before anything mechanical fails.\u003c\/p\u003e","brand":"Rola-Chem","offers":[{"title":"Default Title","offer_id":48634282213588,"sku":"ROL-56-6166","price":68.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0801\/9568\/2516\/files\/default_9b7d4b91-8861-4648-b5c0-aa2882de3f4a.jpg?v=1788828093"},{"product_id":"flowmeter-1-5-pvc","title":"Rola-Chem 1.5\" PVC 25-60 GPM Top Mount Flowmeter","description":"\u003cp\u003eThe Rola-Chem 570341T is a top mount flowmeter for 1.5 inch PVC pipe, reading 25 to 60 GPM. It installs into the top of a horizontal run and gives a direct reading of what is actually passing through the line.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy a flowmeter earns its place\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eMost equipment pads are judged by a pressure gauge, which really only reports how loaded the filter is. Flow rate is the number that everything else is specified against: pool turnover, the minimum flow a heater needs before it will fire safely, the dosing a chlorinator is rated for, and the point at which a pump is being asked to push more than its plumbing can take. A flowmeter puts that number in front of you every time you walk the pad.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFitting and range\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eIt is scaled 25 to 60 GPM, which is the working band for a 1.5 inch line. Pick the mount and pipe size to match the run you are installing into, and give the meter a straight length of pipe ahead of it so the reading settles. Rola-Chem makes matching meters in larger sizes and in side and vertical mount styles for other parts of the system.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eService parts\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe o-ring and the black caplug are available separately, so a leaking or damaged meter does not always mean a new meter.\u003c\/p\u003e","brand":"Rola-Chem","offers":[{"title":"Default Title","offer_id":48634375831764,"sku":"ROL-56-6164","price":67.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0801\/9568\/2516\/files\/default_caf50fd6-f175-4d57-be9b-82d84f949db0.jpg?v=1788828735"},{"product_id":"flex-tube-w-clamp-prem-13-25","title":"Rola-Chem Premium Flex Tube with Clamp 13.25 in.","description":"\u003cp\u003eThe Rola-Chem 523114 is the premium flexible squeeze tube with clamp and fitting for Rola-Chem chemical feeders, 13-1\/4 in. long in black Norprene.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eThe part that wears out\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eA peristaltic chemical feeder works by squeezing a flexible tube with a set of rollers, pushing chemical along without the liquid ever touching a pump mechanism. That design is why the pumps handle aggressive chemicals well, and it is also why the tube is the consumable. Every revolution flexes the same section of tube. Eventually it fatigues and splits, and when it does the chemical ends up inside the pump head instead of in the pool.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eOrdering the right one\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eRola-Chem lists this tube at 13-1\/4 in. and in the premium Norprene grade. Rola-Chem also sells a standard version at the same length and other tubing options for its feeders, so measure the tube you are pulling out and match the length and grade. Most operators keep a spare on hand and change the tube on a schedule rather than after a failure.\u003c\/p\u003e","brand":"Rola-Chem","offers":[{"title":"Default Title","offer_id":48634421739732,"sku":"ROL-451-6081","price":31.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0801\/9568\/2516\/files\/default_2cc4d2b7-33f1-49d6-8e8c-0b1798e96a8d.png?v=1788830274"},{"product_id":"rc-lock-assembly-knob","title":"Rola-Chem Lock Knob Assembly for RC303\/305\/307 Peristaltic Pumps","description":"\u003cp\u003eThe Rola-Chem 523408 is the lock knob assembly used on the RC303, RC305 and RC307 peristaltic chemical feed pumps. It is the knob that clamps the roller housing cover closed over the pump head.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy it fails\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe knob comes off every time the squeeze tube is changed, and that is exactly when it gets cross threaded, over tightened or dropped. Once the knob will no longer draw the cover down tight, the tube is not pressed properly against the rollers and feed rate falls off or the head leaks.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCheck the model first\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis knob is listed for the RC303, RC305 and RC307. The source listing specifically states it does not fit the RC252 or the RC301, so confirm the model on the pump label before ordering.\u003c\/p\u003e","brand":"Rola-Chem","offers":[{"title":"Default Title","offer_id":48634719994068,"sku":"ROL-451-9000","price":10.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0801\/9568\/2516\/files\/default_00db8908-5487-435c-ba01-84e72bbeb32d.jpg?v=1788836563"},{"product_id":"hose-clamp-6","title":"Rola-Chem Small #6 Plastic Hose Clamp for Pro Series RC300 Peristaltic Pumps","description":"\u003cp\u003eRola-Chem 520110 is the small #6 plastic hose clamp used on Pro Series RC300 peristaltic pumps. It is the factory clamp for the feed tubing on those pumps rather than a general purpose worm drive band.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy plastic\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe lines on a chemical feed pump carry sanitizer or acid. A plastic clamp has nothing on it to corrode where a metal band would, and it is what Rola-Chem specifies on this pump.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSmall versus large\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis is the small size, the #6. Rola-Chem also lists a larger #8 flexible clamp under a different part number, so check the tubing you are clamping before ordering. A clamp is a small part with a large consequence: once one goes brittle and loses tension the tubing can walk off the barb, and the pump keeps dosing onto the pad instead of into the water.\u003c\/p\u003e","brand":"Rola-Chem","offers":[{"title":"Default Title","offer_id":48634724581588,"sku":"ROL-451-6079","price":6.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0801\/9568\/2516\/files\/default_da4a1f99-e4dd-4c67-94b6-40740c17a254.jpg?v=1788836647"},{"product_id":"tubing-vinyl-31-x-44-x-66-7-16-od","title":"Rola-Chem 66\" x 7\/16\" Vinyl Tubing for Peristaltic Pumps","description":"\u003cp\u003eThis is the Rola-Chem 520120 vinyl tubing for peristaltic chemical feed pumps: a 66 inch length with a 7\/16 inch outside diameter.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eThe one part that wears\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eA peristaltic pump has no seals and no impeller. A rotor with rollers squeezes a length of flexible tube and walks the chemical along it. That means the tube does all the work and takes all the abuse, and it is the part that eventually fails while everything else in the pump is still fine.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow to tell it is due\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe motor turns, the rotor spins, and nothing arrives at the injection point. Pull the tube out and look at the section that runs under the rollers. If it has gone flat, stiff, cloudy or split, that is your answer. Match the outside diameter to the pump head when you order, because the OD is what the rollers are set for.\u003c\/p\u003e","brand":"Rola-Chem","offers":[{"title":"Default Title","offer_id":48634965000404,"sku":"ROL-451-0091","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0801\/9568\/2516\/files\/default_b87ad788-b208-4fee-b2b1-36921a6e886a.jpg?v=1788839107"},{"product_id":"ez-glide-silicone-lubricant","title":"Rola-Chem E-Z Glide Silicone Lubricant, 3 gm","description":"\u003cp\u003eRola-Chem E-Z Glide is a silicone lubricant supplied in a 3 gm size, part number 523102. It is intended for the o-rings, gaskets and seals on pool equipment.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy silicone and not grease\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eRubber seals need a lubricant that will not attack them. Silicone leaves a slick film that helps the seal seat and lets it release cleanly next time, without swelling or softening the rubber. Petroleum based greases and household jelly do the opposite: the seal puffs, distorts and no longer fits its groove, and it usually fails within a season.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eUsing it\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eClean the seal and the groove first, since lubricant over grit just holds the grit in place. Wipe a thin film over the o-ring by hand, seat it fully and close the housing. A 3 gm size covers a lot of o-rings when it is used that lightly.\u003c\/p\u003e","brand":"Rola-Chem","offers":[{"title":"Default Title","offer_id":48635043381460,"sku":"ROL-451-6120","price":7.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0801\/9568\/2516\/files\/default_10fc6cee-9df8-45b2-af8e-cbb29424ac72.jpg?v=1788840580"},{"product_id":"controller-orp-ph-programable","title":"Rola-Chem Digital Controller Orp-Ph Programable | 554000","description":"\u003cp\u003eRola-Chem Digital Controller Orp-Ph Programable. 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