I installed a new gray tank in the tt Im rebuilding. I have the original plumbing and gates valves but the plastic is very old and brittle and Id like to replace it. What I cant find is the section of 3.5" pipe that slides into the tank. The one I have has an o-ring and groove for it on the outside of pipe. Slide that in and clamp it with a hose clamp. Does anyone know where I can find this piece of pipe with an o-ring? I have looked through pages and pages of RV sewer fittings with no luck. Perhaps Im not searching for the right thing. Thanks!
If worse come to worse you might have to put in a bulkhead fitting. To do that you'll have to drop tank and install a access porthole if you can't reach with your arm. Basically drill a big hole so you can get arm and wrench inside tank to tighten bulkhead fitting and then install cover for access hole you drilled.
Thanks, I thought about doing that and have one of those couplers. The problem is the flange coming out of tank is so thin and short I wouldnt be able to clamp it very hard without collapsing the tank outlet or causing that coupler to squish/slide off the outlet. If I do have to go that route I will stick a piece of rigid pipe inside the outlet to provide the structure so I can get a good tight clamping between the tank and coupler.
Not exactly sure if this will help or not...But years ago a had to re-do my drains on an older TT. I used one of these fittings. Worked out fine. I picked up at local hardware store. Clamps never came loose. I also put some putty tape around it.
