blangen wrote:
Air in the HW tank. Pull the pop-off lever and let the air out. Or open the highest valve and let run to remove air.
Air pocket in WH SHOULD be there..it is by design.
Water swells when heated.
Water can NOT be compressed...air can
W/O air pocket pressure will increase inside hot water tank/system causing TPRV (Temp/Press Relief Valve) to weep
Air Pocket is good
On Edit:
Shurflo 4008 is a 55 psi pump
You may need to use 'flexible' suction/discharge lines IF pump is plumbed with hard PEX (discharge line to cold water header)
And you may need to install an accumulator tank
