Heatseeker UniPanel®
Solar Pool Heating
18
Vacuum Relief Valve
The vacuum relief valve is installed at the base of the manifolds. The valve provides ‘vacuum
relief’ when the solar pump turns off by allowing the water to drain back to the pool. Air is drawn
into the system through the top of the valve due to gravitational forces opening the internal
seal. When the pump turns on water pressure will re-seal the vacuum relief valve. Air should be
expelled into the pool within 2-3 minutes depending on the size of the system and during this
period the resulting turbulence created will cause some associated noise.
Vacuum relief valves should be inspected regularly (2-4 months) during the months of
operation. If it is leaking or blocked (no surges of air returning to pool) it should be cleaned. This
can be done by pulling the cap off the top of the valve. Remove visible obstructions and wash
the components with water. The solar pump must be turned off before cleaning commences.
Vacuum relief valve maintenance
Failure to correctly install a vacuum relief valve in your system or inspect and
maintain its operation will void all warranties related to panels, pipe work
and fittings.
