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Negative suction fire pumps for existing water tank

Question asked by vasu.chittem on Jan 8, 2020
Latest reply on Jan 11, 2020 by vasu.chittem


We are designing fire protection system for an existing plant.

Plant has sufficient under ground tank and pumping capacity with negative suction. Due to addition of new building height, project need to change the existing pumps.

Now question is to utilization of existing water tank with negative suction or need to construct new tank for doing positive suction.

Can we get related reference from NFPA regarding negative suction on existing tanks.