I posted a problem about a month ago regarding a situation where the
suction pressure at churn of a pump was 12 psi less than the static
pressure during a flow test. Both were read at no-flow conditions and
there is no elevation difference. I was looking for an explanation,
as yet, none has emerged. The pump is a diesel drive and has a relief
valve that is piped back into the suction line. Could this be the culprit?
Todd G. Williams, PE
Fire Protection Design/Consulting
Stonington, Connecticut
www.fpdc.com
860.535.2080
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