SharkBite 20' Blue PEX Stick Pipe for cold water. It is used with 3/4" quick connect & brass pex insert fittings. It is W type B burst pex pipe rated 1,100 psi at 73 degrees Fahrenheit, 375 psi at 180 degrees Fahrenheit. Type B silane method pex has more anti-oxidants & thermal stabilizers which is critical for chlorine ratings & recirculation systems. Type A,B,C are European system designations not rating/grading system for pex. Do not use duct tape, pipe dope, threading compound, mineral/linseed oil. Support pipe every 30" vertically & horizontally. Protect pipe when entering/exiting slab or walls. Do not kink or expose to sunlight. Minimum clearance to water heaters, boilers, wood burning appliances 18", recessed lights 12", gas appliance vents 6". NSF-61 FDA, CSA/ASTM, UPC listed/approved. 25 year warranty even when used with other manufacturers ASTM SDR-9 certified fittings. Covers materials, labor & is not pro-rated.