Part # 5002-13

Manufacturer Code 233

Dimensions 2-7/8" ID, 1/8" Cross Section

Alternate Part #'s 35-5331, 355331, 47-0233-04-R, 47023304, 90-423-1421, O-421, O421, PAC1013135, SPP-2330, 90-423-5233, APCO2254

Product Description

INYO # 5002-13 PENTAIR #355031

Black rubber diffuser o-ring used on the Pentair Challenger High Head pumps.

For the Challenger Medium Head pumps, used part # 5002-13A.

Frequently Bought with Diffuser O-ring

Magic Lube O-ring Lubricant 630


?     Asked on 12/3/2015by Inyo Visitor

I am ordering an o ring. How do you differentiate between a "High Head" and Medium Head" pump?

A  Answered on 12/7/2015 by InyoPools Product Specialist Lennox H.

Hi, If you have the model # of the pump housing we can find out that way or take the pump apart and the diffuser and seal plate o-ring will be squared with the medium head pumps verses round on the high head model pumps.

?     Asked on 6/1/2016by John mccormack

I have pump CF11 - N1 - 1 1-05-C97 / 34-3234 For key item ##13 5002-13 or 5002-13A Which item do I need? Thanks

A  Answered on 6/7/2016 by InyoPools Product Specialist Lennox H.

Hi John, Base off of the model of your pump you will need p/n 5002-13A.

?     Asked on 3/8/2017by Martin

My pump is a 2hp Challenger PAC-FAB CHII-N1-2A, is that high head or medium mead?

A  Answered on 3/9/2017 by InyoPools Product Specialist Hector F.

The CHII series is high head.

?     Asked on 7/3/2018by Inyo Visitor

where exactly does the o ring go

A  Answered on 7/4/2018 by InyoPools Product Specialist Alex V.

Hello, This o-ring is installed on the face of the diffuser. 

?     Asked on 5/10/2020by Rockie Chan

Hi I have a B2840 CX 56Y HP2.5 Century motor , which tune up kit # do I need? Thanks

A  Answered on 5/11/2020 by InyoPools Product Specialist Patrick P.

For us to suggest the proper seal kit could you send a photo of a wide shot of your complete pool pump to show the pipes going in and out of the pump? To supply your photos simply click the reply link below and upload your photos. Once we get this photo we can make the proper recommendation for the seal kit.


Est. Repair Time

Less than 1 hr

Tools Needed


Water leak

Written on 5/20/2018 by Guest

Turn off pump
Drain water
Remove big clamp
Seperate pump from strainer
Remove big o ring
Clean groove where o ring fits
Replace o ring
Marry pump back to strainer
Tighten clamp
Fill with water to assist in priming pump
Turn pump on and check for leaks

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