Done a lot but never replaced a thruhull .Wanna do a stainless as it is right on the waterline.Bathroom sink discharge is a 1" id clear plastic hose not reinforced.Should one assume the thruhull needs to be a 3/4 ?? My 1st thought was to get a 1" thru hull and heat the hose end and work it onto the thruhull.Like I stated,done a lot but never done this.The easy crap is where screwups usually take place.Easy enough to measure the old thruhull but wanted to ask.Will be 5200ing the outside bead.Thanks Charlie
I would question the use of a clear, non-reinforced plastic hose but that’s just me.
Thru hulls do not have hose “barbs” per say. The hose to fitting connection is a slip fit retained with hose clamps. The proper size hose should not need to be heated to install on a thru hull. Replaced every thru hull on mine using dish washing detergent as a lubricate. Everything is double clamped
Don’t want to use a “high strength adhesive” (5200) to seal a self retaining, threaded fastener. 4000 or 4200 is more than adequate for the job.
To make the job easier, I reached up behind the fitting and removed the stainless steel hose clamps and nut from the back of the thru hull and pulled the fitting out of the hull to expose the connection. Makes it a lot easier to slip the hose over the barb.
Just remember to make sure the clamps and nut are on the hose, inside the hull, prior to installing the new thru hull on the hose.
