4x40 End cap Oring size

[hunterhunter111]

Does anyone know the internal oring size on a 4x40 housing end cap. I have searched and it doesn't seem to be a popular topic. I have the stainless steel housing with plastic endcaps and 1/2 inch npt ports.

[hodorskib]

I'm not sure of the size, but here is where I ordered my replacements last year. Hope it helps:
https://www.reverseosmosis.com/produ...SLxlyETA&gQT=1

[hunterhunter111]

Thanks for the link