I'm for the flow test CJDave mentioned.

I'm not for the centrifugal over the jet though. The jet will pull plenty of water for his needs in the shower and do a great job of boosting if more water is available, which I agree should be. But I think a centrifugal would try to draw too much water which would make any possible cavitation worse than would the jet pump.

I didn't know Pat had a sprinkler system. If so, how good does it work and what flow does it require. That would answer a big question.

bob...