Hi all, Ok, this is a farmy type question but I know there are lots of clever builder/fix it people here so I thought I'd ask... We have big concrete water tank that has a tap at the bottom with a tap on it. We've never used the tap but I guess it would be handy if we ever wanted to drain the tank. I noticed this evening that the cows (god love 'em have snapped the tap off and obviously drained the tank. I thought I could just buy another fitting and screw it in, but they've cleverly ripped part of the old thread out as well so its basically stuffed. I was going to get a guy i know to try and weld a plate over it (attached to the remaining rim of the pipe. Now Im thinking the best solution is to fill the hole with a concrete mix or product but not sure what to use. I reckon its probably 1inch 1/4 in diameter. Im thinking along the lines of inserting some sort of backing (carboard etc like you sometimes do when you fill a plaster hole) and then plugging it with something that is obviously waterproof and hard drying. I know in the past one of our tanks received a nasty gash from being hit by lightening and it was repaired better than new. Not sure what was used though. Any ideas would be greatly appreciated!