Jabsco Par-Max 3.5 for feeding a High Pressure Pump

[Catamoron]

Setting up my DIY watermaker and am using a High Pressure Pump that requires/uses 2.2 gpm am I'm wondering if a Jabsco ParMax 3.5 would be good enough to supply what the pump needs.

I know that the spec sheet says it would deliver 3.5 gpm but that is open flow - does anybody know what the flow rate is when there is say 10 psi or 20 psi caused by pre-filters starting to clog up? I don't want to have to change filters so often because my 3.5 low pressure pump can't deliver enough water once the pre-filters have a little age on them.

Thanks.

[sailorboy1]

The real problem is that it isn't met to run for that long.

[Lepke]

In my experience, small diaphragm pumps don't last long when run continuously.
Pumps that did work for me were AG sprayer pumps. They're more heavy duty and often used in a continuous mode.
Also if you put a small accumulator tank after the pump, when it reaches pressure, it stops and gets a cooling cycle. And don't set the pressure any higher than needed.
A place I've bought several pumps, 12v and AC:
https://www.northerntool.com/shop/to...8&Ntt=12v+pump