Compound water meter registered a negative flow reading during high flow test
Compound water meter registered a negative flow reading during high flow test
(OP)
During a high flow (7000 L/min) fire water pump test, a compound meter connected to the piping system recorded a diminished reading (I.e. Backwards reading). This meter has been installed in the piping for 6 years and has operated properly until now. Why would this meter record a negative reading at this time?





RE: Compound water meter registered a negative flow reading during high flow test
RE: Compound water meter registered a negative flow reading during high flow test
RE: Compound water meter registered a negative flow reading during high flow test
RE: Compound water meter registered a negative flow reading during high flow test
RE: Compound water meter registered a negative flow reading during high flow test
If the fire flow went through the meter, perhaps a valve was opened too quickly or the pump started quickly causing a shock load on the meter that damaged it. In this case, perhaps the meter should be repaired or recalibrated.
If the meter was on piping that did not receive the fire flow, the pump may have created suction on the water system, pulling water backwards through the piping system.