Certikin Main Drain Accessories


CK33S Stainless Steel Grille
For shallow learner and plunge pools where direct foot contact is made with the pool floor. Supplied as a kit to fit directly onto a standard HD33 or HD33L sump pot.

Hydrostatic Relief Valve: CK34S (heavy brass body) HD34 (plastic body)
Use of a hydrostatic relief valve helps to avoid possible damage to an empty pool if the water table rises above the level of the pool floor. It allows the ground water to enter the pool via the main drain to help to prevent possible structural damage to the pool shell.

HD35 Collection Tube

Works in conjunction with the hydrostatic relief valve to collect water from the underside of the pool floor.

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