Bad threads on the water tank. Ideas?

[Raz]

Originally Posted by Tim Wood

Raz, I probably missed something here along the way, but couldn't you find a new tank replacement and cut the old tank out ?

Tank is very easy to remove as it just sits in a tub molded in the floor. What has happened is the outlet was leaking. I believe the threads were damaged because of movement of the tank and a lack of flexibility of the pex tubing. I am trying to repair the leak on the cheap! It's an interesting problem and I am learning about water tanks and there repair.

[Thomas G.]

Originally Posted by P. Raz

.............I tried Thomas' idea of adding a hose clamp around the outlet and it did indeed tighten things up. .......... Raz

Did you heat the plastic at the same time? I think that would make a lot of difference. I use an electric heat gun like this:
Heat Gun - Dual Temperature Heat Gun, 1500W

[Tim Wood]

I agree I think the heat gun would help a lot.

[Raz]

Prior to putting on the paste I tried a dry run if you will. Bearing in mind that plastic threads are delicate creatures, the clamp made hand turning the fitting quite difficult. No heat. Next, I put the paste on the fitting, screwed it in and tightened the clamp. I let it cure over night and the tank is currently sitting outside on a bench. It is full of water. So far so good. It won't leak until it is back in the trailer. Murphy, you know. Raz

[Thomas G.]

Maybe there is more you can do to prevent a recurrence - like use a very flexible drain hose like latex (like they use on sling slots).

[Stoney]

Morning Paul if it was me I would get a hole saw 2" put the hole where it needs to be over the original outlet then drill a hole through centre of the piece you remove put in a 3/4" brass valve then take the tank down to a local motorcycle shop with a plastic welder and weld the 2" piece with the new valve back in hook up the apex and for the price of a box of beer your back in business after riding more than 800 000 km on motorcycles I can tell you plastic welds hold and are much cheaper than replacement plastics , some rv shops also have plastic welders jmho , cheers mike

[RogerDat]

Might consider that this RV tank repair kit uses epoxy. AP Products Plastic Tank Repair Kit found that kit listed at two RV suppliers. Along with this repair how-to that suggests one uses epoxy/resin How to Repair Your RV's Freshwater Tank | eHow.com
Can always test small spot with epoxy at the top where you could plug if epoxy eats tank.

[mszabo]

Melt the two fittings together. Get a plastic welder from harbor frieght.
Or heat a screwdriver with a torch a use it to weld the two pieces together.
Don't have the stomach to melt together? Slip a piece of hose over the fittings and double hose clamp. Use a ratchet to tighten instead of a screwdriver.
Mike

[Randy Bishop]

Raz
Sent you a P.M.