Apollo Xpress Copper Press Fittings - PexUniverse
A: To ensure a proper seal, there must be a minimal spacing between the press connections on larger pipe/fitting sizes (min. spacing of 1/2' for 1-1/4' pipe; 5/8' for 1-1/2' pipe and 3/4' for 2' pipe). The outer surface of the copper pipe end must also be free from sharp edges which can damage the O-ring and compromise the seal.
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