Used in PHVAC applications, polypropylene-random (PP-R) piping systems feature straight, threadless transition from PP-R pipe to copper sweated connections. This facilitates fitting out installations entirely in PP-R. While PP-R portion of stub-out is mold-injected PP-R and connected via heat fusion, copper portion is connected using copper solder joints or compression fittings. Straight Aquatherm-to-copper stub-outs come in ½, ¾, and 1 in. dia and respective lengths of 11, 11, and 18 in.
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