I'm almost sorry to bring this up again as there are many many threads all over the internet
about this subject and i would hate to admit how much time i've spent reading on this subject and still don't really have an acceptable answer so i am going to ask.
Background, bought an Old PaceShip PY26 that had a big bladder for the black water holding tank
that stank. I have replaced the entire system from head
to hose to bladder. We felt we could not put a hard tank in so we got a Vetus bladder.
The old bladder was not vented and the new bladder has a 5/8 vent tube connector factory installed. So after all my reading I understand that venting the holding tank
will hopefully reduce/prevent the stink.
However my big concern right now is where to place the through hull
vent.I have purchase
a standard stainless steel
vent with 2 screened holes almost side by side. Something like this Gas Tank Vent .63 Chrome Plt Thru Hull Fitting 5/8""H
The bladder is under a settee in the cabin
right about in the middle of the boat as close to the head
as possible. I feel like i want to mount the vent just below the rub rail in the middle of the boat so that my vent line is as short and straight as possible. However i am concerned about water
getting sucked back down the vent line and filling the bladder when healed over on that side. I feel like with the 2 vent holes facing backward it may not be a problem. Maybe put a valve on the vent line to close while sailing and open when at anchor
or docked or will a loop in the hose before the vent prevent this.
The other options is to place the vent above the deck
but i think the smell from the vent would waft into the cockpit
. I had someone say just run it back to the transom but this would require about 13 feet of 5/8 vent line,which may need to partially lower then the bladder itself, instead of about 3 feet straight up.
What the communities recommendations on this situation(other then switch to a solid holding tank) and thanks in advance.