Grill grate: 5x 20

the pool edge's construction

All three rings can be regulated individually

Water flow: at 4 bar 14 l / min

Fully foam-insulated construction for better heat retention

Astore PVC Backventil 50mm Titel:Default Title Grill grate: 5x 20PVC Non Return Valve 50mm with Solvent Weld Connections on Both Ends, PN16 Quality. It prevents water from flowing back into your pool hose or pipe when you stop turn off your pool pump. PN16 means that this valve can withstand 16 bars of pressure, which in turn guarantees that it is a very high quality non return valve with good material choices. The reason you should install a non return valve on your pool equipment is to prevent water from moving