Plumbing & Pipe Repair Diagnostics

What is the key difference between PEX-A and PEX-B tubing in residential plumbing?

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 Correct IncorrectPEX-A is manufactured with the Engel peroxide method, giving it higher flexibility and thermal shape memory allowing cold expansion fittings (Uponor/ProPEX). PEX-B uses silane crosslinking and typically uses crimp/clamp rings.

What is the key difference between PEX-A and PEX-B tubing in residential plumbing?

• PEX-B is only rated for boiling acidic chemicals
• PEX-A cannot be bent around 90-degree framing studs
• PEX-A has thermal shape memory for cold expansion fittings, while PEX-B uses crimp/clamp rings
• PEX-A is made of aluminum while PEX-B is brass