Can my pex line freeze if I use 90 degree elbow connectors?

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If you are concerned about freezing, then the simplest answer is to install a ball valve inside the house, where it is insulated, so that you can shut off and drain the water before it exist the house.

As for connecting to the sillcock, 1" pex is a slightly unusual size; Most sillcocks are 3/4 inch but 1/2 inch sillcocks are also fairly common, so (probably) what you want is a 1 inch barb to 3/4 inch (reducing) female threaded connector. I found an adapter from sears that could do the trick. U S BRASS CORP/ZURN-QEST QQSFC45GX 1 x 0.75 in. Barb Ringed Shank Pex Adapter. Below is picture of it, but for $17 it's not what I would choose. Also, you would need a 1" ball valve which will cost about $10-$12.

I think that the better solution would be to use a 1" to 3/4" reducer for $2, a 3/4" ball valve for $7 (it's a few $$ cheaper than a 1" ball valve), then a 3/4 inch barb PEX female threaded fitting for about $3. Obvioulsy, you would need some 3/4" pex and some...

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Additional information as this winter tests out badly routed plumbing. PEX that gets water frozen inside it stretches and expands over time.

The weak point is fittings. Depending on the fitting, it can crack, the crimp rings can be stretched leading to a leak from the fitting or the PEX slipping off under pressure. They don't use the type fittings where they expand the PEX to go over a plastic fitting around here so I don't know how those hold up.

Keep the fittings out of the freeze zone, and summer cabin owners recommend having a gravity drain so the pipe doesn't grow or else charge the system with RV antifreeze.

My former neighbor had a blowout in the soffit in his new house built quite recently. It was a couple weeks ago where we had a snap down into the teens, a fitting let go. As a plumbing system, PEX is a lot more forgiving, but not invulnerable.

If you do freeze up, PEX is an insulator, it will take longer after heating the containing area for...

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First, a definition of "take off": The length of pipe to be removed (taken off) such that a pipe and a fitting make a specific length. The term is a concept shorthand used by pipefitters and plumbers. This is not the same as a material takeoff, which is a list of all materials needed for a project.

Take-offs in general are specific to pipe construction (PVC, copper, etc.) and is a function of diameter.

As suggested by bcworkz, tables for a given diameter and style of pipe are the best method for an accurate measurement.

The formula (listed in your link) .625 x pipe size (don't use the 25.4 factor, unless you are using millimeters) should give you a ballpark for a 45...

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A cross-linked polyethylene (PEX) pipe

Cross-linked polyethylene, commonly abbreviated PEX or XLPE, is a form of polyethylene with cross-links. It is formed into tubing, and is used predominantly in building services pipework systems, hydronic radiant heating and cooling systems, domestic water piping, and insulation for high tension (high voltage) electrical cables. It is also used for natural gas and offshore oil applications, chemical transportation, and transportation of sewage and slurries. PEX is an alternative to polyvinyl chloride (PVC), chlorinated polyvinyl chloride (CPVC) or copper tubing for use as residential water pipes.

Properties[edit]

Almost all PEX used for pipe and tubing is made from high-density polyethylene (HDPE). PEX contains cross-linked bonds in the polymer structure, changing the thermoplastic to a thermoset. Cross-linking is accomplished during or after the extrusion of the tubing. The required degree of cross-linking, according to...

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You can run PEX line as you would in a conventional plumbing system, with 3/4-in. main lines and 1/2-in. branch lines. You can also use a “manifold” system, where you run a 1/2-in. line to each fixture from a central spot.

Run your main lines first. If you're running PEX through joists or studs, drill 3/4-in. holes for 1/2-in. piping and 1-in. holes for 3/4-in. piping. Have a helper feed the line to avoid kinks and snarls. Some manufacturers recommend adding abrasion clips at each hole. You must use them for PEX that goes through metal studs, and nail protection plates when the tubing runs within 1-1/2 in. of the face of a stud or joist. Once you've run your main line, go back and mark the location of each branch line, leaving a 1-in. gap for the barbed...

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