That's a very good description of it. I don't recommend using it as a fitting at the bottom of a tank, but it's great for inlet and vent fittings...and it WILL NOT LEAK as long as the hose doesn't pull to a side, top or bottom. That can cause the pvc pipe to break the seal.
(my vent thru-hull) is the same as the fuel tank vent, it has two little holes further restricting it.
Boat builders use the same fuel
vent thru-hulls on ALL vents because it costs 'em less than separate ones for each type of tank. That's ok for water
, but NOT for waste because waste needs to be managed...water and fuel do not.
Good source for I assume a polyethylene tank, one I have from IP is aluminum and I think I'd rather not go back with Aluminum?
No...you don't want a metal waste tank...urine typically turns any metal waste tank into a colander in an average of about 10 years.
Ronco Plastics (no relation to the VegoMatic Ronco) Ronco Plastics Marine Catalog
is your best source for a rotomolded PE tank...they make TOP quality thick-walled (at least 50% thicker than most off-the-shelf or OEM tanks) tanks
for a very reasonable price
and have more than 400 shapes and sizes, over 100 of which are non-rectangular. And they install fittings in the quantity, sizes and locations specified by the customer when they make the tank. They sell direct to end users...they're also great to work with...we were Ronco distributors for nearly 10 years.
Btw...if you'd like some help improving your existing tank plumbing
and venting, give me a shout...I'll be glad to help.