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Post by vance on Jul 26, 2023 16:44:05 GMT -8
I believe it's the tank valve o'ring groove?
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Post by antique diver on Jul 27, 2023 6:21:18 GMT -8
I agree, and add another reason I like the 70 in the valve face. Any type used in that application seems (to me) to wear out and begin to leak more often than orings in other applications, and the 70 is much easier to dig out for changing than a 90 or the urethane orings. What/where is the/a valve-face? JB It is facing north if you are wearing the tank and facing north.
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