Good little booster pump! A little noisy from vibration mostly, I may buy a peice of rubber (something) and put it under the pump and remount it to the floor. I use it in an RV to boost the hot water line to the back of the trailer where the shower is. Seems to give me hot water sooner and more steady with this inserted in the line. Comes on when there is a demand on the hot water. It was $40 give or take so not a bunch of money, easy to install and works fine. Again, the only knock would be the vibration noise,