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How to Connect PEX to Faucets and Toilets

Tom

PEX tubing can simplify potable water plumbing installations, while providing added freeze resistance, hot/cold color coding, and a reduced risk of pinhole leaks. PEX’s flexibility reduces the need for fitting connections, which can greatly cut down on installation time.

 

There are several ways to come through walls and make connections to fixtures with PEX. Most people prefer not to have colored PEX exposed. Since PEX also may not be as rigid as copper (for holding valves, etc.), transitioning to copper stub-outs is a popular option. SupplyHouse.com carries copper stub-outs with several different PEX connection options. Drop ear elbows offer a comparable way to transition from PEX to rigid pipe.

 

Uponor offers several items that make PEX penetrations neat and attractive. Their PEX Wall Support Bracket mounts between wall studs. It provides holes for 1/2” and 3/4” PEX. Uponor 1/2” Bend Supports snap right into the larger holes on the brackets, making it easy to create secured 90-degree bends to fixtures. Used with an Uponor ProPEX escutcheon and chrome finishing sleeve, PEX can be concealed all the way up to a stop valve. Holdrite manufactures a wide range of similar parts, including plastic stub-out clamps, PEXRITE stub brackets, bend supports with wood mounting brackets, and pre-assembled PEX stub-out kits.

 

SupplyHouse sells angle-stop and straight-stop valves with several PEX connection options: crimp (e.g. ProPEX, PEX Press, and SharkBite). These valves adapt to the appropriate risers or flexible hoses for connections to fixtures such as faucets, toilets, and dishwashers. Due to the rise in popularity of home-run piping systems with PEX and manifold shut-off valves, many PEX lines servicing fixtures have centralized shut-offs. In such systems, using PEX swivel adapters to connect PEX directly to faucets and toilets could be a viable option. Keep in mind, however, that this strategy may result in exposed PEX and more difficult access to valves in emergency situations. Local codes also frequently require shut-off valves at all fixtures, whether the lines servicing them have centralized valves or not.

 

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