Thermal Storage Tank Fitting Seal?

[damon_sisk]

I have 2x 500 gallon propane tanks, filled with water. There are multiple pipe threaded fittings, but none of them leak. I would like to permanently (and very reliably) seal the fittings that are made for the float/gauge mechanism. I thought of tapping the hole, but it would be at least 1.25 pipe thread. I had a flat piece of steel bolted down (there are 4 tapped holes around the fitting) and sealed with caulk, but it was unreliable.

Any suggestions?

 

[maple1]

Get a patch welded on. That's what my welder did.

 

[woodsmaster]

I welded a patch over mine. You may want to drain the water down some so you don't get a cold weld.

 

[Coal Reaper]

Yep weld

 

[grumpy chief]

If you can weld that's a permanent fix. It could be fixed by drilling and tapping more holes so it is fastened every inch or so. Get a piece of gasket material from an auto parts supply and cut out a fresh gasket.

 

[salecker]

welded mine as well

 

[maple1]

Actually I think with mine, I just got a plug the right size so it sat in the hole then my welder just welded the plug in.