The city water pressure is low on my street. I went to a local hardware store for a booster pump. The salesperson said that all I needed was a swallow well pump, tank, pressure switch, two shut off valves and a check valve. The tank and switch go on the pressure side. The shut off valves go before and after the pump. The check valve goes between the city supply and the house water lines.

I have a second question: Should I put a second check valve between the city supply and the pump?

Thank you for your help.

I would think the advantage of a designed booster pump is the absence of having to install/set all of the stuff he listed for you. Plus, the pump is doing what it is designed to do which does away with any concerns about violating the warranty. Take a look at this example:

Pedrollo 20 GPM - 30 PSI Booster Pump with Electronic Controller - 115V - FX3CR05A16P - 115V (http://www.aquascience.net/booster-pumps/index.cfm?id=1014)

Thank you jlisenbe. Your solution is very easy. And less expensive.

If I could, I would like to ask how can this pump bring in more water? To go from 15PSI to 30PSI would I not need twice as much water?

That is a terrific question. I'd call the manufacturer and run that by them. If it proves to be an issue, you could go to a pressure tank after the booster pump. Of course, that's what you are trying to avoid right now. Typically, you are not trying to go from 15 to 30 (doubling), but something a little more modest such as 30 to 45. Still, I'd call and ask them before plugging in that kind of money.