I installed a ShurFlo Smartsensor 5.7 a few years ago. It is a variable speed pump, runs very quiet, and gives a lot of pressure. No problem with the fittings. Never had a leak with the 60 lb pressure the pump delivers. Only problem is getting used to the idea that a lot of water is going to come out when you open the faucet. Takes some getting used to or you will waste a lot of water. I installed it to eliminate the noisy water pump on an electric head.