suspected leak in water tank

[catmandoo]

I have a suspected leak in my water tank which I think is a crack in one of the welds opening up when the tank gets pressurised by water in an external flexible tank half a meter higher in elevation . The tank is D shaped with the curved bit downwards so the welding is at the ends and along the top longitudinal horizontal edges . The ends are much stiffer so I suspect the longitudinal welds at the top as the culprits

I am reluctant to take it out pressurise it with a few inches of air and do the old bubble test since that means removing all the flooring and honestly I dont have the energy for it or the time .
. Two days ago while tying a knot something twanged in my hand and I can now no longer extend my thumb to cadge a lift althouch I can use it to scratch my palm . So in fear of losing some other vital digital control such as to extend my two middle fingers in a horizontal and upward direction I am looking for an easy way out to fix the problem .

Eg pump some goo into the water and let it ooze out of the crack , solidify and seal it .

I remember long ago when putting large cast iron sea water filter vessels under test leaks through bad fusion of casting chaplets were stopped ( with Lloyds inspector hiding his face) by putting some ammonium sulphate in the test water as well as hammering on the nasty chaplet .

So is there some one out there with an easy fix forSS water tanks without taking them out ( no manhole by the way )

yours gratefully

An old banger /forums/images/graemlins/laugh.gif /forums/images/graemlins/smirk.gif

 

[oldsaltoz]

Try heating the weld with a hot air gun to make sure it's very dry, then add some Araldite, the remaining heat will make it thinner but setting will be fster, so use a small brush to push it into the areas you think may be cracked.

If it's a fine crack this should hold it for perhaps a season, if it's a genuine crack it may not last long at all.

Also consider a patch of heavy plastic sheeting glued to the side and top all round, still only a temporary fix though.

Good luck.

Avagoodweekend......