Hi, I wanted to ask you the following question. Some time ago the plumber installed a lift pump at home. The point is that soon after there was a loss due to the exit, that is, at the junction of the pump outlet to the pipe that goes to the tank. The union had done it for what I saw with teflon and green pasta. As soon as I started the work, I took out the equipment but now I need to reinstall it again. My question is whether the loss could be due to the fact that when the water came out with pressure the teflon + h3 combo does not work or if it had been badly placed. I put the same? Do I put something else to seal? Thank you.

hello: look how is the spout in the tank if it has a mechanical float, if not, place a rubber stain between the pump and the pipe so that the vibration does not loosen the connections greetings

Teflon in the correct amount and adequate tightening are sufficient and there should be no leaks. Is the lift pump to fill a tall water tank or to feed a second floor? If it's just to feed a water tank there is no pressure. I am inclined that the first time it was wrong.