Pentair UT90 Cracked Pipe

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brad79

New member
Apr 7, 2025
2
Chambersburg, PA
Hello all,

We opened our pool the other day and there is a crack inside the heat pump. Water began pouring out as soon as we turned it on. See attached photos and video.

VIDEO: IMG_3874.MOV

We do open/close it ourselves and have done so for the past few years without issue. I'm guessing we didn't drain the heater properly and it froze over the winter. Pool was installed in 2020.

I was able to find the part that is cracked, which appears to be the manifold bypass (also attached).

My question is - Do you think it's worth having that part replaced (quoted 1K) or could there be additional damage in other places from the freeze? Called one pool company and they quoted us almost 6k to replace the entire unit. :(

Thanks!

IMG_3875.JPG IMG_3878.JPG

IMG_3879 (Custom).PNG IMG_3883.PNG
 

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Welcome to TFP.

I would bet $1K and hope there is no other damage.

The company should run water through after the repair and check for leaks before they put the panels back on and button it up.
 
I will try to get it taken apart for a better pic but it's that one stretch of pipe circled in red in the post that appears to be damaged. There is a hairline crack that runs from connection to connection, which you can kind of see in the picture. The pool tech is concerned that there may be other components broken but he hasn't come out to look. He was just going off of the media I posted above. Thanks for the responses so far!
 
You might just be able to redo the PVC for very low cost.

You do not need any of the original parts.

Cut out the bad PVC and replumb.

You really do not need the bypass and check valve unless the flow will be high.

Even if you need a bypass and check valve, you can just buy the check valve by itself.

It is a 12 lb check valve, which makes zero sense since the head loss never gets to 12 psi.
 
The head loss never gets to 12 psi, so how does a 12 psi spring check valve make any sense?

Pentair Water Bypass Check Valve - R172305 - INYOPools.com

Water Bypass Check Valve - Pool & Spa Parts
www.inyopools.com www.inyopools.com

www.doheny.com

Part R172305 - Doheny's

Shop for Part R172305 at Doheny's. Unbeatable Low Prices.
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38 475176Z WATER MANIFOLD BYPASS KIT39 R172305 WATER BYPASS CHECK VALVE

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