Temp Posted November 4, 2021 Share Posted November 4, 2021 Local water main burst about an hour ago. Wife ran hot tap for some reason and drained the water so secondary loop pump was practically dry and making a noise. Currently all switched off hoping the pump isn't kna456d. Is it worth installing a pressure sensor to turn off the loop pump if the pressure drops? Anyone done something like this? Link to comment Share on other sites More sharing options...
JohnMo Posted November 4, 2021 Share Posted November 4, 2021 Do you have a check valve installed to stop reverse flow? Link to comment Share on other sites More sharing options...
Temp Posted November 4, 2021 Author Share Posted November 4, 2021 You mean on the secondary loop? Don't think we have. Are you thinking the loop pump might have sucked air in via the open tap? Link to comment Share on other sites More sharing options...
JohnMo Posted November 5, 2021 Share Posted November 5, 2021 This is what our instructions said that came with the pump When using pump models with pump housing code 65B (item 9 in Figure 3), use the G1/2 check valve (item 14 in Figure 3) supplied in the packaging. This prevents water from flowing through the pump backwards when any faucet is opened, thus causing damage. • When using a check valve other than the factory supplied one, pay attention to the appropriate closing pressure. • Install the check valve after the pump in the direction of flow, so that the arrows on the pump housing and on the check valve point in the same direction Link to comment Share on other sites More sharing options...
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