Low Point Drain Valve Mods?

[billycuth]

No I totally understand, and appreciate you trying to help. I almost think the thing was setup wrong...

I used the pump to flush the water out through the grey tank, but I dunno. I don't think this is gonna work when winter time comes.

[Doug]

On my 165 Sport, I do not have a drain for the fresh water tank.
I use the pump to drain most of the water. I will always have some left.
Many people say once you get it as low as possible, there's room for expansion and freezing is not a problem.
You can also add some anti-freeze in the fresh water fill spout, then flush in Spring.

I always put about 1/4 cup of clorox in my fresh water tank after using it, because there is always an inch of water left.

JMHO,

Doug