JG Speedfit and Hep2O Plastic Push-Fit Systems — A Trade Guide
JG Speedfit (polybutylene) and Hep2O (PEX) are the two dominant plastic push-fit plumbing systems for concealed domestic hot and cold water pipework. This trade guide covers pipe properties, fitting preparation, barrier pipe requirements for heating circuits, pipe support centres, thermal expansion, UV protection, and common installation mistakes — with the key standards you need on site.
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