O-ring for 4" RO Housing

[bigjws]

Do any of you guys know the size for the o-ring that sits between the black cap and the housing for a 4"x40" RO setup, looks like the one pictured below? The housing I have has been leaking from the endcap -- I think whomever replaced the o-ring before used one a bit too thin, and it is able to move a bit in the groove. The local hardware store has one labeled OR-340 which looks to be the same size as the one I think is too thin .. the diameter looks good, but needs to be thicker, and I don't know what the '340' actually stands for..

 

[Rudy]

I bought a O-Ring repair kit (similar to this on Zoro: https://www.zoro.com/zoro-select-st...f_NkZmBOb9yXmiCOmYsrDdaMEHjVcT7caAlItEALw_wcB)

It has been a life saver when you need crazy sized orings.

Maybe it'd work for you?

 

[Roz]

We used

Kleen-Rite Corporation - Internal O-Ring for 2.5" & 4" End Caps

Internal O-Ring for 2.5" & 4" End Caps

www.kleen-ritecorp.com

With sealant grease

 

[MEP001]

That's the o-ring that goes in a groove inside where the small center tube of the membrane seals.

 

[bigjws]

We used

Kleen-Rite Corporation - Internal O-Ring for 2.5" & 4" End Caps

Internal O-Ring for 2.5" & 4" End Caps

www.kleen-ritecorp.com

With sealant grease

I agree with MEP, I think this is a different one than what I'm looking for. I found this one, going to give it a shot for $7..

External O-Ring for 4" End Plug of Membrane Housing

Buy Online: External O-Ring for 4" End Plug of Membrane Housing | Same-day shipment for all stock orders placed by 3pm.

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