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Mark Carter

Cat Water Pump vs Electric Water Pump heat issue

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In a previous post I was dealing with a Cat pump with reduced pressure.  As often happens the simple solution was to just swap it out with a stock electric pump.  Then the new electric pump would run great for 10-15 min and shut off.  After 3-5 min it would come back on.

The more nozzles were open the longer it would run.  Since this seemed like a heating problem - I checked the pressure relief valve to see if it was returning water to the tank.  Which it was.

More investigation revealed that the Cat pump uses a 50 PSI relief valve, whereas the electric pump uses a 25 PSI valve.  So I was getting too much back pressure causing the pump to overheat.

Now with the proper 25 PSI relief valve - everything works great.  

Hope this post saves someone some time.


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Guest Pacific Sweeping

wow, great to know! Thanks for sharing Mark

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