Sureflo 5,7 Water Pump

I have a 5.7 and one day it just kept running at a slow speed and would not shut off. looked at my pressure gauge and it read over 100 psi!. I have now gutted the "smart sensor" stuff and am using it as a transfer pump now.

Pauljdav wrote:
Are you on shore power? A low battery will cause this.

Yes, I'm on shore power.

I know this isn't a solution, but I'd probably go for a variable speed water pump and an accumulator tank. What that will give you is a lot quieter pump, for not too much a price premium. The accumulator tank will allow water to be used for small items without having to run the pump constantly.

Rather than email Shurflo, I would give them a call (I did, a lot). They are very helpful there and they understand that there can be issues with the 5.7 pumps.

Unless a problem with your installation shows itself soon, I would pretty much count on getting a new pump. For me the symptoms were exactly as "Newblue" described: The pump just keeps idling along. For one failure I just let it keep doing that, using a power switch to control it. Evertually I started getting rust and an oily taste in my water. Yumm!

Regarding the Revolution 4, it is not as quiet as the 5.7. On the other hand, it doesn't sound like it's about to fly apart, like each of the 5.7's did. At the point my fourth pump died, I was about to go out and buy a Jabsco pump. But the rev 4 has restored my condfidence in ShurFlo's engineering.

mlts22--Do you mean "variable" speed? Isn't it the constant speed pumps that work well with accumulators?