Midnightsun wrote:Source of the post Great work, love it when one takes the time to do it right.
Both my tanks have vacuum relief valves on them from the factory. Not that it is required but just adds additional protection against blocked vent or over powerful pumpout units and now is the time to do it before the tank sees it first use. Heck, did not even know this existed until I saw them on my tanks and researched it. https://www.dometic.com/en-us/us/produc ... er-_-25365
That's a pretty cool product and probably a good idea. I actually fitted something like the one below (that's used for under-counter drain vent in a house) to a friend's 480 Sedan Bridge because his marina installed a new "high vacuum" system that was so strong it was deforming his tank and was pulling the hoses off. It adapted nicely to the clean-out port in the top of his tank so we didn't even have to cut into the tank, and it worked great. He had already replaced all the vent system but still had a problem that this solved.
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