By Custom Molded Products



Part # 25830-350-000

Alternate Part #'s _25830-350-000, 25830350000, CMP25830350, CMP25830350000, CTM-56-1028

Product Description

Check Valves - Serviceable Check Valves, Corrosion Resistant

  • 1-1/2" Socket
  • 2" Spigot
  • CPVC Body (Black)
  • Clear Lid
  • Lock Nut
  • Corrosion Proof Pin and Spring
  • Corrosion Proof Hastelloy Spring -  For high stress and corrosive environments

For more Pool Valves

Product Specifications

Inside Diameter:
1 1/2 in.
Outside Diameter:
2 in.

?     Asked on 9/30/2016by Don

Can this flapper check valve be installed in a vertical pipe run?

A  Answered on 9/30/2016 by InyoPools Product Specialist Alan M.

Yes this check valve can be installed horizontally or vertically.

?     Asked on 12/22/2016by Bruce Sutherland

what is the total length?

A  Answered on 12/22/2016 by InyoPools Product Specialist Adam Y.

Good afternoon Bruce, The overall length is 7.5" L by 2-7/8" H.

?     Asked on 1/15/2017by Mark

Check value cover has 2 pin holes, Can I purchase cover only? outside diameter is 5"

A  Answered on 1/16/2017 by InyoPools Product Specialist Adam Y.

I need to know the pipe size it connects to.

?     Asked on 5/26/2017by Inyo Visitor

i want to install this after my de filter and before chlorine feeder...the chlorine is not going to destroy it after a couple seasons?

A  Answered on 5/26/2017 by InyoPools Product Specialist Lennox H.

Hi. The check valve is designed especially for high corrosive environments like being installed next to a chlorinator. It will last, I can't say forever but it will for a few seasons. The replacement Corrosion Resistant Flapper Assembly & Cover - 25830-350-800 is available if it fails.

?     Asked on 7/18/2017by Skyking

Will this hook up to 1 1/2 inch plumbing without the need for reducers. Will this just slide over my 1 1/2 inch pipe?

A  Answered on 7/18/2017 by InyoPools Product Specialist Alex V.

Hello, Yes, 1.5" pvc would fit inside of the check valve. 


Est. Repair Time

1 to 2 hrs

Tools Needed

Pliers, Adjustable Wrench, Electric Drill

Leaking Check Valve

Written on 7/17/2023 by Guest

The clear plastic cover on the original check valve started to leak so I purchased this part with the idea that I would just replace the cover and keep the black housing as a backup. This would avoid having to mess with cutting/replacing any of the PVC pipe. What made it challenging is that there was no info to go off of on the original because all of the labeling had worn off so not part #, etc. After quite a bit of research I was confident that this part was the correct replacement and I went ahead with the order.

Once the part showed up and I started to look closer at the original, I realized that, even though the new part was a match, it was not going to just be an easy swap out. The installers who did my pool had drilled a hole in the cover (or maybe it came like that..), placed a copper anti-corrosion device inside it and then attached a ground wire on top using the same post.

I didn't want to eliminate either of these measures since I figure there's a reasons for them so...gulp..I decided to drill a hole in the top of the perfectly new cover which I knew meant I wouldn't be able to return the part if it didn't work. It took a bit of fiddling but eventually I was able to drill the hole, reattach everything and get it to seat properly so I am now happily leak free.

Were these instructions helpful? 


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