IF you have sufficient volume, then boosting the pressure works. If there isn't enough volume coming in, then you'll burn the pump up quickly. This Olde House has a session on installing one, which may work as a good reference if you check their website and watch it. Basically, it has a check valve, a small bladder tank that holds some water under pressure so the pump doesn't need to run with each water use, and obviously the pump. Basically, it's like a mini well pump system.