I'm looking at purchasing a manifold mount MaxFlo and I'm just wondering about which orings use which materials? I usually try to stick with factory spec but if it's just a static oring for HPA I'd probably switch it out for buna if it were urethane.
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The bulk of the seals are fine in buna, but I always recommend the 009-90 oring that serves the equivalent of a reg seat to stay urethane, I find they're a more consistent reg that way.
Also, I'd recommend leaving the 003-90 seal in the reg piston alone unless it's causing problems, it's a real bitchkitty to install.
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