Rola-Chem 521170 PVC injection check valve for peristaltic metering pumpsRola-Chem Injection Check Valve, PVC, 1/4" NPT, 521170 In stock$4099
Rola-Chem 521170 PVC injection check valve for peristaltic metering pumps

Rola-Chem Injection Check Valve, PVC, 1/4" NPT, 521170

Ask a questionMPN 521170
$4099
In stock

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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.
Full description and specifications ↓

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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.

Specifications
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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Customer reviews

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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