Hello BenzMac

I'm not sure what you mean about o-rings.

My filter is a canister that has a built-in rubber o-ring. There is a metal washer and the bolt has a rubber o-ring built into it at mid-length, which I'm not sure I can change without changing the whole bolt.

Do you mean changing the metal washer or the rubber o-ring that's on the bolt?

Thanks in advance

Nicolas

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1982 300D - http://members.xoom.com/nicodore/