Quote:
Originally Posted by T-Cut
If that's so, then I have to assume that the earier pressure cap (designed for the black tank) was slightly different in the way it relieved pressure.
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T-Cut,
I am still using my original pressure cap (marked '100') with my original black tank. On a few occasions in the past I have seen a few drops of antifreeze residue on the hose which lies directly beneath my tank overflow. I have never seen evidence of venting on the tank itself. It therefore seems that your assumption may well be correct.
If my cap ever fails I could offer it for dissection, but at present it's still going strong (with replacement 'O' ring seals) after 21 years service!
Simon