By Waterway
Part # 4740-54
Manufacturer Code 550-9000
Dimensions 6.5" L x 5.1" W x 0.65" D
what is the purpose of this door? do I really need it in order to have an efficient pool.
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Buster, The weir door helps prevent debris from going back into the pool when the pump is turned off. It is recommend to have it in place but I have seen pools without one installed
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