The McAlpine S7 Pushfit Overflow Adaptor is a plumbing fitting made by McAlpine that is used in overflow systems. The "Pushfit" designation indicates that the fitting is designed for easy installation and can be pushed into place without the need for additional tools or sealants. The "Overflow Adaptor" describes the purpose of the fitting, which is to connect an overflow pipe to the rest of the plumbing system. Overall, the McAlpine S7 Pushfit Overflow Adaptor is a specific plumbing fitting that may be useful in certain applications where an overflow pipe needs to be connected to a larger plumbing system. Its pushfit design makes installation quick and easy. ・ Available in 1¼" and 1½" sizes