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Old 04-29-2013, 07:29 AM   #13
Ebaugh
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City: Panama
Country: Florida
Vessel Name: Mar Azul
Vessel Model: DeFever 44
Join Date: Jan 2013
Posts: 32
We have had problems over the years with fresh water diaphragm pumps. But it has always been the pressure switch, never the motor or pump head. The last failure a few months ago, I bought a standalone pressure switch and bypassed the one built into the pump head. Something like this:

http://www.flotecpump.com/Residentia...ssure%20Switch

Although I got an Italian version in a Colombian hardware store. They cost under $20. Im hoping they are more robust, but if not, I bought 2, so I already have a spare!

The ones on the PARMAX 4 in particular are junk. We've had 2 failures in 2 years, but the pumps themselves seem OK.

Our Spectra water maker uses 2 Shurflo pumps. In that application they run continually when making water. I've run that system 24-30 hours occasionally, probably have around 1500 hours of operation on each pump at 70 psi without failure. That's much better than I expected.
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