I'd like to drain my water tank">fresh water tank, however draining it via the sink faucet is taking forever. Can I force this cap off without damaging it? If so then I could manually pump it out. Looks like it has some kind of sealant gunk around it.
Its not that big of a tank here is what I do I remove the hose from the underside of the faucet and start a syphon into a bucket or just into the bilge then use bilge pump from there.( I use a 5 gallon water jug.)