
Pentair Rainbow 1/4" Tube x Tube Check Valve with Compression Nuts, R172323
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Quick overview
- Genuine Pentair Rainbow Factory part R172323 for the Rainbow chemical feeder line.
- Tube to tube Both ends take 1/4 inch tubing.
- Compression nuts included The nuts come with the valve, so the tubing can be made off straight away.
- Fits four feeder models Listed for the 300, 302, 300-19 and 300-29 chemical feeders.
- Stops backflow A check valve keeps feeder solution moving one way and protects the equipment upstream of it.
- Direction matters Fit the valve the way round the feeder installation calls for, since a check valve installed backwards blocks the line.
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Frequently bought together

Rainbow 1/4" Tube x Tube Check Valve with Compression Nuts, R172323
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Product details
The Pentair Rainbow R172323 is a 1/4 inch tube by tube check valve supplied with compression nuts. It is listed for the Rainbow 300, 302, 300-19 and 300-29 chemical feeders.
What it does
A chemical feeder pushes solution along a small tube. A check valve in that line lets it travel one way and shuts if pressure tries to send anything back, which keeps feeder chemistry out of places it should not reach. It is a small part that protects considerably more expensive equipment.
Making it off
Both ends take 1/4 inch tubing and the compression nuts are included, so the connections can be made without hunting for extra fittings. Fit the valve the correct way round for your feeder installation, because a check valve turned the wrong way simply stops the line.
When to change one
Check valves in chemical service age from the inside. If a feeder line weeps back, or the feeder stops holding pressure, the check valve is one of the first things worth replacing rather than diagnosing further.
| Brand | Pentair |
|---|---|
| Manufacturer part number | R172323 |
| UPC | 788379005313 |
| Series | Rainbow |
| Type | Check valve |
| Connections | 1/4" tube x tube |
| Included | Compression nuts |
| Fits | Rainbow 300, 302, 300-19 and 300-29 chemical feeders |
| 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.
Which feeders does it fit?
What size tubing does it take?
Do the compression nuts come with it?
Does orientation matter?
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