Re: model number of CAT pump on watermaker.

Paul Stascavage


The CAT pump model is 277. I just replaced mine.

Make note that the one I received had NPT threads on all the plumbing ports. The original on our boat was also NPT with the exception of the high pressure outlet port that feeds the membrane connection. The original pump was metric.

All the best


SM #466
S/V Rita Kathryn

Currently Cruising New England

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