Our heavy-duty skimmer can be used for residential and commercial swimming pools of different types: concrete, fiberglass and vinyl. The 3 models are injection molded and made with UV resistant ABS material; the reinforced material provides the maximum strength and durability for all weather conditions. It has an option of 3 connection sizes viz, 1-1/2"interal threaded, 2"external threaded and 50mm for gluing. Overflow connection 40mm. Max recommended flow 5m3/hr. For optimum results it is recommended to use 1 skimmer per 25m2 of pool surface area. The skimmer suction can also be used for suction sweeping the pool.