PVC, carbon and alloy steel, stainless steel, titanium, and zirconium. Common ratings and features assigned to industrial pipe include maximum pressure, temperature range, flexible, lined, plated, ...
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A Guide To Pipe Fittings and How To Use Them
PVC and CPVC, PEX, ABS, galvanized steel and cast iron — can mostly all be connected to each other with appropriate fittings.