Pentair Rainbow R172288 chemical resistant 1-1/2 in. x 2 in. spring check valvePentair Chemical Resistant 1-1/2" x 2" Check Valve, R172288 In stock$7799
Pentair Rainbow R172288 chemical resistant 1-1/2 in. x 2 in. spring check valve
Shop all Pentair

Pentair Chemical Resistant 1-1/2" x 2" Check Valve, R172288

Ask a questionMPN R172288
$7799
In stock
Get volume pricing Request a quote

30 day returns · Easy, with prepaid labels provided

Quick overview

  • Built for chlorine special spring and seal materials made for corrosive chemical feeder service.
  • Two sizes in one body 1-1/2 in. slip socket and 2 in. spigot, so it fits either pipe size without adapters.
  • Protects the equipment stops treated water flowing back from the chlorinator into the heater, filter and pump when the system shuts off.
  • Enclosed 2 lb spring the spring is sealed away from the flow, keeping it free to open and close.
  • Full free flow the open design does not choke the return line.
  • Mounts any way you need can be installed in any position, vertical or horizontal.
Full description and specifications ↓

Need a hand?

Bilingual support from pool professionals.
(888) 751-8084CallChat with a techChatEmail usEmail

Send us a message

A pool professional will get back to you, usually the same business day.

About Pentair Chemical Resistant 1-1/2" x 2" Check Valve, R172288, SKU RAI-451-4039. We will include it with your message.

We use your details to answer this message and nothing else.

Frequently bought together

Current item Pentair Chemical Resistant 1-1/2" x 2" Check Valve, R172288
Pentair

Chemical Resistant 1-1/2" x 2" Check Valve, R172288

$7799
Hayward Cover O-Ring for SP0714T Vari-Flo XL Valve, SPX0714L
Hayward

Cover O-Ring for SP0714T Vari-Flo XL Valve, SPX0714L

$1799
Hayward Paralevel Startup Kit, 004-760-2921-00
Hayward

Paralevel Startup Kit, 004-760-2921-00

$5999
Hayward 1-1/2" Combo Hose Adapter for Filters, Pumps, Skimmers and Chlorine Feeders (2 Pack), SPX1091Z7
Hayward

1-1/2" Combo Hose Adapter for Filters, Pumps, Skimmers and Chlorine Feeders (2 Pack), SPX1091Z7

$1099
Hayward Genuine OEM SP1082 Skimmer Basket, SPX1082CA
Hayward

Genuine OEM SP1082 Skimmer Basket, SPX1082CA

$2499
Paramount 6 Port Water Valve Module, 004-302-4408-00
Paramount

6 Port Water Valve Module, 004-302-4408-00

$36099
Hayward Auto-Skim Skimmer for Vinyl/Fiberglass Pools, 1.5" FPT, Square Lid, White, SP10841
Hayward

Auto-Skim Skimmer for Vinyl/Fiberglass Pools, 1.5" FPT, Square Lid, White, SP10841

$19199
Subtotal

Similar products

Other products people compare with this one.

Jandy 4715 Neverlube 3-port diverter valve, 1-1/2 in. x 2 in., top view Jandy 1-1/2 in. x 2 in. Neverlube Positive Seal 3-Port Diverter Valve, 4715$7399 Pentair Compool 263028 three port diverter valve, 2 in. x 2.5 in. Pentair Three Port Diverter Valve 2" x 2.5", 263028$5999 Jandy 4717 NeverLube 3 port diverter valve, 2 in. x 2-1/2 in. Jandy NeverLube Valve 3 Port, 2" x 2-1/2", 4717$10299 Jandy 7305 spring check valve, 2 in. internal by 2-1/2 in. external ports Jandy 2 in. / 2-1/2 in. Check Valve, 7305$8399 CMP 25830-400-000 Hydro Seal black CPVC check valve, 2 in. socket x 2.5 in. spigot CMP Hydro Seal Black CPVC Check Valve 2 in. S x 2.5 in. SPGT 25830-400-000$4099 Jandy 4716 Neverlube positive seal two way diverter valve, 2 in. x 2-1/2 in. Jandy 2"-2 1/2" Neverlube Positive Seal 2-Way Diverter Valve, 4716$9499 Hayward SP0723 Trimline 2-way ball valve, 1-1/2 inch mpt by 1-1/2 inch fpt Hayward Trimline 2-Way Ball Valve, 1-1/2" mpt x 1-1/2" fpt, SP0723$4199 Pentair 263029 two port PVC diverter valve, 2 in. x 2-1/2 in. Pentair Two Port Diverter Valve, 2 in. x 2-1/2 in., 263029$5299 Jandy 4944 NeverLube 3 port valve, 2-1/2 in. by 2 in. Jandy Neverlube 3 Port Valve, 2-1/2" x 2", 4944$10699 Hayward PSV3S2DGR 2 in by 2-1/2 in PSV Series 3-way diverter valve in PVC Hayward 2" x 2-1/2" PSV Series 3-Way Diverter Valve, PVC, PSV3S2DGR$5199
Hayward PSV3SDGR 1-1/2 in by 2 in PSV Series 3-way diverter valve in PVC Hayward 1-1/2" x 2" PSV Series 3-Way Diverter Valve, PVC, PSV3SDGR$5599 Jandy 7235 two way check valve with 1-1/2 inch and 2 inch ports Jandy Check Valve, 1-1/2" / 2", 7235$6499 Pentair 263037 three port diverter valve, 1-1/2 inch by 2 inch Pentair Three Port Diverter Valve 1-1/2" x 2", 263037$5099 Pentair 263042 black CPVC straight check valve for pool plumbing Pentair Check Valve, CPVC, 2", 263042$8299 Hayward PSV2S2DGR PSV series 2-way diverter valve, 2 in. x 2-1/2 in. PVC Hayward PSV Series 2-Way Diverter Valve, 2 in. x 2-1/2 in. PVC, PSV2S2DGR$5199 Hayward PSCV2S2DGR 2 in. x 2-1/2 in. straight PVC check valve, gray Hayward 2 in. x 2-1/2 in. Straight PVC PSV Check Valve, PSCV2S2DGR$5499 Hayward PSV2SDGR 1-1/2 inch by 2 inch PSV Series 2-way PVC diverter valve Hayward 1-1/2" x 2" PSV Series 2-Way Diverter Valve, PVC, PSV2SDGR$4399 Hayward SP0735 1-1/2 in. 4 way ball valve Hayward 1-1/2" 4 Way Ball Valve, SP0735$8399 Jandy 4718 Neverlube 2 port dial valve with 2-1/2 inch and 3 inch PVC connections Jandy Neverlube Valve 2 Port, 2-1/2" x 3", 4718$9299 Pentair 263035 three way CPVC diverter valve, 1-1/2 inch by 2 inch Pentair 3-Way 1-1/2" x 2" CPVC Diverter Valve, 263035$9299

From Pentair

Your trusted source for all things pool. Pentair

Pentair equipment

Pentair SuperFlo VS 1.5 HP Variable Speed Pool Pump, EC-342001 Pentair MasterTemp 400 Natural Gas Pool Heater, EC-462028 Pentair Clean & Clear Plus 420 sq ft Cartridge Pool Filter, EC-160301 Pentair IntelliConnect Control & Monitoring System with Wi-Fi, EC-523317
Shop Pentair equipment

Genuine Pentair parts

Pentair Genuine OEM Seal Kit for WhisperFlo and IntelliFlo Pool Pumps, 356198 Pentair Genuine OEM High Flow Manual Air Relief Valve, 98209800 Pentair Genuine OEM FNS Plus Element Assembly Complete, 48 Sq Ft, 59023400 Pentair Genuine OEM MasterTemp/Max-E-Therm 6-Button Control Board Kit, 461105Z
Shop Pentair parts
Pool lighting: a backyard pool and spa lit in blue and green at nightPool water treatment: three people floating on rings in clear blue water, seen from abovePool cleaners: a toddler in flower sunglasses laughing in a yellow ring, held by her mother
Pentair makes pumps, filters, heaters, salt chlorinators, cleaners, lighting and automation for pools and spas.Shop all Pentair

Product details

The Pentair Rainbow R172288 is a spring loaded check valve made for the one job most check valves fail at: sitting downstream of a chlorine feeder. Its spring and seal are chosen for corrosive service, so chlorinated water does not eat the valve that is supposed to protect the rest of the equipment.

Why it belongs after the chlorinator

When the pump shuts off, the concentrated solution in a tablet feeder can flow backwards into the heater, filter and pump. That is how heat exchangers get pitted and how pump seals fail early. Installed between the feeder and the equipment, this valve lets water pass only toward the pool and holds everything else back. Pentair shows it in the installation drawings for the Rainbow 300 series and 320 feeders as well as the 302, 300-19, 300-29, 322, HC-3315, HC-3330 and 3340.

Fit and installation

One end is a 1-1/2 in. slip socket and the other is a 2 in. spigot, so it solvent welds straight into either pipe size. The 2 lb spring is fully enclosed and closes the valve in any orientation, which means it can go in a vertical or horizontal run wherever there is room. The full free flow design keeps the pressure drop low.

Specifications
Brand Pentair
Manufacturer part number R172288
UPC 788379005245
Type Chemical resistant spring check valve
Connections 1-1/2 in. slip x 2 in. spigot
Spring 2 lb, enclosed
Construction Corrosion resistant, with special spring and seal for corrosive applications
Mounting Any position
Flow Full free flow design
Used with Pentair Rainbow chlorinators, models 300, 302, 300-19, 300-29, 320, 322, HC-3315, HC-3330, 3340
Shipping weight 1.65 lb
Ships Parcel

Request a quote

Need a volume price, a freight quote, or pricing in writing before you order? We reply the same business day.

Request a quote

Customer reviews

More from Pentair

Pentair SuperFlo VS EC-342001 1.5 HP variable speed pool pump, front view Pentair SuperFlo VS 1.5 HP Variable Speed Pool Pump, EC-342001$1,48900 Pentair SuperFlo EC-348190 single speed pool pump, 1 HP, 115/230V Pentair SuperFlo 1 HP Single Speed Pool Pump, 115/230V, EC-348190$74800 Pentair WhisperFlo VS EC-011533 2.6 THP variable speed pool pump, top view Pentair WhisperFlo VS 2.6 THP Variable Speed Pool Pump, 115/208-230V, EC-011533$1,79900 Pentair 262506 HiFlow 1.5 in. six way clamp style multiport valve Pentair Genuine OEM HiFlow Valve 1.5 in. 6-Way Clamp Style, 262506$20999 Pentair EC-520556 IntelliChlor 110/220V power center Pentair 110/220V IntelliChlor Salt Chlorine Generator Power Center, EC-520556$79900 Web Price Pentair 523769 IntelliChlor Plus and LT replacement sensor board Pentair IntelliChlor Plus and LT Replacement Sensor Board, 523769$40499 Pentair 350305S 3.2 kW 10 pole variable speed motor for IntelliFloXF and IntelliFlo 2 VST pumps Pentair 3.2 kW IntelliFloXF VSF, VSF, VS+SVRS, i1, i2 Motor, 350305S$78199 Pentair 523735-EC IntelliChlor Plus40 salt chlorine generator cell Pentair IntelliChlor Plus40 Salt Chlorine Generator Replacement Cell, 40,000 Gallons, 523735-EC$1,81900 Web Price Pentair Rainbow 320 in-line chlorinator R171096, front view Pentair Rainbow 320 In-Line Chlorinator, R171096$14999 Pentair 190003 tank clamp kit with tension control for Clean and Clear Plus, FNS Plus and Quad DE filters Pentair Genuine OEM Clamp Kit with Tension Control, 190003$31099
Pentair IntelliChlor LT25 salt chlorine generator cell 523747-EC Pentair IntelliChlor LT25 Salt Chlorine Generator Cell, 25,000 Gallons, 523747-EC$1,15699 Pentair IntelliFlo VS+SVRS variable speed pool pump, EC-011057 Pentair IntelliFlo VS+SVRS Variable Speed Pool Pump, EC-011057$2,39900 Pentair 170145 cartridge pack for Sta-Rite System 3 S7M120, inner and outer cartridges Sta-Rite 170145 System 3 S7M120 Large and Small Cartridge Set, 25021-0200S and 25022-0201S$47999 Pentair 261055 SM-20-3 2 in. side mount multiport valve kit, front view Pentair 2 in. Multiport Valve Kit for Side Mount Sand Filters, SM-20-3, 261055$30899 Pentair 523770 IntelliChlor Plus replacement controller (HMI), black Pentair IntelliChlor Plus Controller Replacement (HMI), Black, 523770$39599 Pentair 261152 SM20-2 2 in. side mount multiport valve kit for DE filters Pentair 2" Valve Kit Multiport, Side Mount DE Filters SM20-2, 261152$30799 Pentair 357149 WhisperFlo and IntelliFlo volute housing replacement kit, front view Pentair WhisperFlo and IntelliFlo Volute Housing Replacement Kit, 357149$29699 Pentair MicroBrite Color LED pool light EC-620425, 12 volt, 14 watt, with 100 ft cord Pentair MicroBrite Color LED Pool Light 12 Volt, 14 Watt with 100' Cord, EC-620425$61900 Pentair 59023400 FNS Plus 48 sq ft complete DE grid assembly Pentair Genuine OEM FNS Plus Element Assembly Complete, 48 Sq Ft, 59023400$40599 Pentair Amerlite EC-602128 500W 120V inground pool light with stainless steel facering Pentair Amerlite Pool Light for Inground Pools with Stainless Steel Facering, 500W 120V 50' Cord, EC-602128$43900 Web Price

Questions and answers

What people ask about this product, answered by our pool techs.

Why do I need a check valve with my chlorinator?
When the pump stops, concentrated chlorine in the feeder can drift back down the pipe into the heater and filter and corrode them. This valve only lets water flow one way, toward the pool, so that cannot happen.
What pipe size is it?
It has a 1-1/2 in. slip socket on one end and a 2 in. spigot on the other, so it glues directly into 1-1/2 in. pipe or into a 2 in. fitting.
Can it be installed horizontally?
Yes. The enclosed spring closes the valve regardless of orientation, so it can be mounted in any position.
Which Rainbow chlorinators is it used with?
It is the check valve shown for the Rainbow 300, 302, 300-19, 300-29, 320, 322, HC-3315, HC-3330 and 3340 feeders.
Ask your own question