Part Number for a 4" x 40" Membrane Cap O-Rings ?

[Gallinipper]

Can anyone give me a part number for the two internal cap silicone o-rings that seal the cap to the membrane stem on a 4" x 40"? I found S70209 silicone o-rings to be close but they seem a bit thicker. If someone has the exact part number or location to purchase them, it would be appreciated.

Thanks!

[maple flats]

Contact the membrane manufacturer is my suggestion. Trying something that might just be close may not be good enough.

[Arctic Fox]

Can anyone give me a part number for the two internal cap silicone o-rings that seal the cap to the membrane stem on a 4" x 40"? I found S70209 silicone o-rings to be close but they seem a bit thicker. If someone has the exact part number or location to purchase them, it would be appreciated.

Thanks!

I have the exact same question!

[Arctic Fox]

I can't seem to come up with an answer to this, though I've called several people. The closest I seem to get to purchasing o-rings for these are buying a complete end cap with the o-rings installed, which is not what I want. I can't believe Gallinipper and me are the only ones who have this question.

[carls47807]

https://www.maxwaterflow.com/Max-Water-Commercial-Membrane-Housing-O-ring_p_2422.html

[Arctic Fox]

https://www.maxwaterflow.com/Max-Water-Commercial-Membrane-Housing-O-ring_p_2422.html

I appreciate this link. I'm trying to figure out if these are to seal the cap to the housing, or the membrane to the cap.

[carls47807]

oh sorry, those are for the cap to housing. Is your housing stainless or fiberglass (with the plastic insert for the stem).

[Arctic Fox]

The housing is SS, the cap is plastic. I'm trying to find the o-rings that seal the membrane to the cap - the small o-rings in the center of the cap.

[Arctic Fox]

I located some o-rings from CDL. I had to call them up because they didn't have them listed in the catalogue or website.

The large o-ring is #70417
The small o-ring is #70210