Advice on Fixing A Leak at Pump's Return

[tiride]

I just noticed a leak at the union for my pump return on the way to the filter. The union joins the PVC to the pump and in these pictures you'll see some water glistening under the joint. I'm not sure what the white goo stuff is. But you can see the discoloration on the pump where the water has dripped and there's a wet spot on the pad.

I don't want to get in over my head and wondering what's involved with this repair. Would I be cutting and gluing PVC or can I just unscrew the union and put in a new o-ring or something like that? Thanks!

 

[PoolStored]

Probably just needs a new o-ring and some silicone lubricant.

Look on top of the black part for make and model numbers. Post what it says and we'll find you the right o-rings.

 

[ajw22]

Start by replacing the O-Ring. And don't over tighten it.

where to buy o-ring for union fitting ?

hello I have a few of those union fittings, and one of the o-ring is bad: B&K 1-1/2 in. PVC SOLVENT Schedule 40 Union 164-637HC - The Home Depot Where can I find replacement ? I'd like to buy a bag of 10 so I have backups. is that it: 10-3439 1” Union & 1 1⁄2” Pump Union O-ring (10-PACK)...

www.troublefreepool.com

 

[tiride]

Great info. Thank you both! I think I got this.

 

[JamesW]

Pump Threaded Fitting Dripping

Hi Guys, Recently noticed that my threaded fitting coming out of my Whisperflo is starting to drip. We've had a few hard freezes recently in Georgia and I'm just wondering if something cracked in there. It doesn't drip every single time the pump runs but it's regular enough for me to notice...

www.troublefreepool.com

 

[JamesW]

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[tiride]

Probably just needs a new o-ring and some silicone lubricant.

Look on top of the black part for make and model numbers. Post what it says and we'll find you the right o-rings.

The only writing I can find looks like it says PPO GFNB. I attached a picture but you'll need to zoom in.

 

[JamesW]

Maybe this.

Super-Pro 2" Universal Pump Union - 21063-200-000

Super-Pro, 21063-200-000 Above Ground Pool Pump Union Fitting, Hi-Temp, 2" MIP x 2" Slip (200-906) Pump Union for Pentair IntelliFlo and WhisperFlo Pumps 2" X 2" (2" NPT male X 2" female NPT quick connect) Sold Individually - Each pump requires two Replaces Pentair Pump Union 11201-0154

www.thepoolsupplywarehouse.com

 

[JamesW]

https://www.pool360.com/Product/2-s-black-cpvc-hi-temp-union-pool-spg-56-2001

Amazon.com

Custom Molded Products Hi-Temp Threaded Union (2"- 2") | 21063-200-000

High-Temp Union - CMP

www.c-m-p.com

CMP 2" MPT, 2" Socket Union, Single - 21063-200-000 - INYOPools.com

CMP 2" MPT, 2" Socket Union - 21063-200-000

www.inyopools.com

 

[JamesW]

You can probably get the whole unions cheaper than the O-rings.

Check the O-rings and measure the dimensions.

The face O-ring is unusual and harder to find.

26200-210-632 CMP PVC Hi-Temp Union T-Gasket

O-Ring Sizes

There are two main o-ring sizing types. Standard was developed for use in the USA, while the international community uses metric for their o-ring dimensions.

www.sealanddesign.com

 

[JamesW]

https://www.c-m-p.com/wp-content/uploads/2017/09/2021-Pool-Catalog-REVB-Compressed.pdf

https://www.c-m-p.com/wp-content/uploads/2017/09/2023-Product-Catalog.pdf

https://www.c-m-p.com/wp-content/uploads/2017/10/2017-Pool-Catalog-Digital-Edition-1.2.pdf

 

[JamesW]

Custom Molded Products Item Number 26100-590-500

https://www.pool360.com/Product/outside-o-ring-for-2-union-pool-ctm-561-0995

 

[JamesW]

I think that it is probably SPRO, which is probably SuperPro.

 

[Bperry]

The only writing I can find looks like it says PPO GFNB. I attached a picture but you'll need to zoom in.

Have you just tried tightening the union and seeing if the leak stops?