First, my apologies if this is covered in other posts. I searched but didn't come up with an answer. Second, I am planning a better long term solution but hopefully what I learn here will inform the long term.
So, I disconnected the vent hose with the good intentions of making it a 1" vent. I also had planned to change the current
configuration to either include a macerator or gravity empty. Due to some other priorities I am now just trying to get my head
back to a sound installation
. I replaced all the 1-1/2" hoses and y-valve (all circa 2005) and they seem secure but first I have to solve the problem at the vent.
The OEM installation
had 5/8" Dometic odor
safe (at least appeared to be Dometic) going from a 5/8" thru-hull to a 3/4" elbow
on the tank. The hose connection on on the thru-hull is smooth. The original tank connection is shown below. Instead of barbed I guess I would call it ribbed but it is 3/4". I tried to reuse the original hose but I can't imagine how they got it to slip over the tank fitting. I tried soaking the hose in near boiling water
but it wouldn't stretch enough. So I thought as an interim step I would get some 3/4" hose with a reducer between. Far from ideal but again I am trying to get back to a working head
until I have time in a month to change the tank fitting and the thru-hull.
I used the reducer also shown in the photo
. It too is "ribbed". The new 3/4" Dometic hose slips on far more easily than I would have expected, especially onto the reducer. All the connections are double clamped. However with a couple of pumps of the handle (air only and the outside of the thru-hull blocked) I can hear and smell air getting past the hose at the tank fitting. I cranked down on the hose clamp but still air is getting by.
The tank fitting worked from the factory but with a hose down one size. Do I need to find a away to get 5/8" hose onto this? Or with 3/4" hose and a ribbed fitting is it critical that the hose clamp not ride on the rib
? I've heard of others putting some sort of sealant
on the connection before installing the hose but am concerned about compatibility issues between sealant
of choice and either the hose or the tank fitting. And sealant seems like I'm avoiding the correct solution.
Thanks for any suggestions.