BLL is right. Measure your water temps coming out of the faucet. If you are around 60F or less, a single pass via gravity will do it for you. If it is too much higher, then you need to consider recirculating with a pump or an ice pre-chiller.
"I brew with a water cooler and some part from the toilet." - JohnnyO
"I do gravity feed the last gallon or two through my Therminator, but I expect you could suck start a Volkswagen before you could suck start one of these. - GilaMinumBeer
"..... Bull was right." - TXCurtis