Swimming Pool Hydrostatic Valve Main Drain Cover White Blue Or Black.

Description Swimming Pool Hydrostatic Valve Main Drain Cover White Blue Black (No Beige). “Order For Concrete or Fibreglass Pools” This is ideal for pools with automatic cleaners.. Ideally weighted to prevent lifting . The extended base retains it in the main drain hole 60mm long and 240mm diameter CONCRETE. The extended base retains it in the main drain hole 20mm long and 240mm diameter FIBREGLASS. Ideally weighted to prevent lifting . Not recommended for use on when drawing water through the main drains . Whats in the box: – 1 x Main Drain Cover.