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The first post

Thursday, September 6th 2012, 9:01pm

by howserss

0 pressure on pump output

When the pump is sitting the pressure reads about 40PSI on the outlet side. I have a guage on it. When it turns on it goes to 0 PSI for about a minute then it finally goes up to about 50PSI while it runs. It just started doing this after I had the irrigation system installed last week. The pump never did this when I used hoses only. The pump was installed in 2008. It has never lost prime over the last 3 years and it was not used that often. Any ideas?