Sioux Chief 638X218E Copper PE...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$12.17
Sioux Chief 638X218E Copper PEX Stub Out with Ear, 1/2" x 18"

Sioux Chief 638X218E Copper PEX Stub Out with Ear, 1/2" x 18"

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Model: 638X218E

In Stock (leaves warehouse same day if ordered before 3pm ET)

$12.17
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Sioux Chief 638X218E Copper PEX Stub Out with Ear, 1/2" x 18"

The Sioux Chief 638X218E is a 1/2" x 18" Type L copper stub out designed to transition PEX tubing systems to a rigid copper termination point behind the wall or floor. Built from Type L copper tube, this stub out combines the versatility of a traditional copper stub out with the easy installation benefits of a PEX rough-in system, letting plumbers run PEX supply lines while still terminating at a code-familiar copper fitting that accepts sweat, push-fitting, and compression valves. The optional square strap/ear design makes it well suited for stubbing up through a floor for closets or lavatories, giving the installer a secure, properly positioned termination for fixture supply connections.

Key Features

  • Trade Size: 1/2" x 18" length, sized for standard lavatory and closet supply rough-ins.
  • Durable Construction: Type L copper tube construction for a rigid, dependable stub-out termination.
  • PEX-to-Copper Transition: Combines the versatility of a copper stub out with the easy installation of a PEX tubing system, simplifying rough-in on PEX jobs.
  • Multi-Valve Compatible: Accepts sweat, push-fitting, and compression valves at the termination point, giving the installer flexibility on final valve selection.
  • Square Strap with Ear: Optional square strap/ear is ideal for stubbing up through a floor for closets or lavatories, holding the stub out in position during rough-in and wall/floor finishing.
  • Not for Air Chambers: Per the manufacturer, this stub out is not to be used as a permanent air chamber.

Technical Specifications

  • Trade Size: 1/2" x 18"
  • Material: Type L Copper Tube
  • Connection: PEX x Copper, accepts sweat, push-fitting, and compression valves
  • Country of Origin: United States
  • Packaging: 25 EA per pack

Typical Applications

  • Lavatory and Closet Supply Stub-Outs
  • PEX-to-Copper Rough-In Transitions
  • Stubbing Up Through Floors with Square Strap/Ear
  • Residential and Commercial Rough-In Plumbing
  • New Construction and Renovation PEX Systems

Why Sioux Chief?

Sioux Chief builds this stub out from Type L copper tube to give plumbers a dependable, code-familiar termination point that bridges PEX rough-in speed with the proven performance of copper at the fixture connection. The included square strap/ear simplifies positioning when stubbing up through floors for closets or lavatories, helping installers deliver a clean, properly supported rough-in every time.

Manufacturer Resources

Spec Sheet

Product Specs

Product Type:
Stub Out
Connection Type:
Push-Fit
Country of Origin:
United States
Department:
Plumbing
Product Group:
Rough-In and Supports
Product Subgroup:
Fittings and Valves
Product Material:
Copper
Product Size:
1/2" x 18"

Sioux Chief 638X218E – Frequently Asked Questions

1) Will a Sioux Chief 638X218E stub out work with a push-fit angle stop, or do I have to sweat the valve on?
Either works. The copper end on the 638X218E accepts sweat, push-fit, and compression valves, so you can solder a stop on, snap on a push-fit stop, or use a compression stop with a ferrule and nut. That is the point of terminating a PEX rough-in at rigid copper: the final valve choice stays open until trim-out.
2) How does the PEX end of the 638X218E connect to my supply line?
The tube is a PEX by copper transition: the back end takes your PEX supply line, the front end is the rigid copper termination for the stop valve. Sioux Chief lists the connection as push-fit, so the PEX side joins without soldering at that point. Confirm the fitting matches the PEX size and type you are running before you make up the joint.
3) What size and length is the 638X218E PEX stub out?
It is a 1/2 inch by 18 inch stub out. The 18 inch leg is sized for standard lavatory and water closet supply rough-ins, which gives you enough length to stub up through a floor or out of a wall and still trim to final height on site.
4) What is the ear on the 638X218E for, and do I need it if I'm stubbing up through a floor?
The ear is a square strap on the stub out that lets you fasten the tube to framing or subfloor so it stays plumb and on-center while you finish the floor or wall. For a toilet or lavatory supply coming up through a floor, that strap is what keeps the stub from getting knocked out of position during rough-in. If you are stubbing through a wall into a bracket or support plate instead, the eared version is not required.
5) Can I use this copper stub out as an air chamber for water hammer?
No. Sioux Chief states this stub out is not to be used as a permanent air chamber. A capped copper leg loses its air charge over time and stops absorbing shock, so if you are fighting water hammer you need a dedicated mechanical arrestor, not a stub out.
6) What copper is this stub out made from, Type M or Type L?
Type L copper tube. Type L has a heavier wall than Type M, which matters on a stub out because the exposed leg takes abuse during framing, drywall, and trim and often gets a compression ferrule bitten onto it. It is also the copper type most commonly specified for commercial potable water.
7) Is a copper stub out worth using on an all-PEX job instead of a PEX stub out elbow?
On an all-PEX rough-in a copper stub out buys you two things a plastic stub does not: a rigid, code-familiar termination the inspector and the trim plumber both recognize, and the freedom to land a sweat, push-fit, or compression stop on it later. The tradeoff is you are introducing a copper leg and a transition joint where a PEX elbow would have been one piece. If the fixture stop is already chosen and it is push-fit, the PEX elbow is simpler; if the stop type is undecided or likely to be swapped over the life of the building, the copper leg is the more forgiving termination.
8) How many 638X218E stub outs come in a pack?
They are packaged 25 each per pack, which suits multi-family and tract work where you are setting two per lavatory and one per water closet across a run of units. Note the country of origin is the United States if you are working a job with domestic-material requirements.
How fast can I get the Sioux Chief 638X218E delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Sioux Chief 638X218E come with a warranty?
Absolutely. The Sioux Chief 638X218E is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Sioux Chief 638X218E?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Sioux Chief 638X218E from ZenSupply?
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