Rola-Chem Injection Check Valve, PVC, 1/4" NPT, 521170 In stock$4099
Rola-Chem Injection Check Valve, PVC, 1/4" NPT, 521170
$4099
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Quick overview
- Genuine Rola-Chem Factory part number 521170.
- For peristaltic pumps Listed for Rola-Chem peristaltic chemical metering pumps.
- PVC body Made in PVC for chemical feed duty.
- Confirm the port size The source data describes it two ways, as 1/4 inch NPT and as 3/8 inch barb by 1/4 inch barb, so check the fitting you actually need.
- One way flow A check valve at the injection point stops pool water pushing back up the feed line.
- Protects the pump Backflow is what ends up in the pump head, so this fitting is doing real work.
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Injection Check Valve, PVC, 1/4" NPT, 521170
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Product details
The 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.
What it does
A 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.
Check the connection before ordering
The 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.
| Brand | Rola-Chem |
|---|---|
| Manufacturer part number | 521170 |
| UPC | 757706001724 |
| Type | Injection check valve |
| Material | PVC |
| Connection, as listed in the title | 1/4" NPT |
| Connection, as listed in the description | 3/8 inch barb x 1/4 inch barb |
| Used with | Peristaltic metering pumps |
| Shipping weight | 0.05 lb |
| Ships | Parcel |
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Questions and answers
What people ask about this product, answered by our pool techs.
What size are the connections?
The source data is not consistent on this. The product title gives 1/4 inch NPT, while the description gives 3/8 inch barb by 1/4 inch barb. Both readings are shown in the specs above, so measure the fitting you are replacing or contact us before ordering.
What is it made of?
PVC.
Which pumps is it for?
Rola-Chem peristaltic chemical metering pumps.
Why does the feed line need a check valve?
Without one, water and pressure from the return line can travel back up the tube toward the pump when the pump is not running. The check valve keeps flow going one way only.
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