Sioux Chief 663-21838SS Self-S...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$100.44
Sioux Chief 663-21838SS Self-Seal Pipe Insulation Sleeve, 2-1/8" ID x 3/8" Wall, 90 ft.

Sioux Chief 663-21838SS Self-Seal Pipe Insulation Sleeve, 2-1/8" ID x 3/8" Wall, 90 ft.

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Model: 663-21838SS

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

$100.44
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Sioux Chief 663-21838SS Self-Seal Pipe Insulation Sleeve, 2-1/8" ID x 3/8" Wall, 90 ft.

The Sioux Chief 663 is a self-seal pipe insulation sleeve built to wrap and protect copper, CPVC, or PEX water lines with a 2-1/8" inside diameter and a 3/8" wall thickness for consistent, even coverage along the run. Each 663-21838SS carton provides 90 ft. of insulation in 6' sections for full coverage across long runs. The self-sealing adhesive seam closes the insulation around the pipe without additional tape, contact cement, or staples, speeding up rough-in and retrofit insulation work. Manufactured in the United States, the Sioux Chief 663 delivers consistent, ready-to-install coverage for exposed or concealed water lines on residential and commercial jobs.

Key Features

  • Trade Size: 2-1/8" ID x 3/8" wall thickness, sized to fit the pipe diameter requiring this insulation.
  • Self-Seal Closure: Adhesive seam lets the insulation be applied and sealed around the pipe in one step, without separate tape or contact cement.
  • 90 ft. Total Length: Supplied in 6' sections totaling 90 ft., enough to cover long runs without reordering.
  • Job-Site Efficiency: Pre-sized, self-sealing design reduces installation steps compared with wrap-and-tape insulation methods.
  • Pipe Compatibility: Suited to copper, CPVC, or PEX water lines in exposed or concealed runs.
  • Country of Origin: Made in the United States for consistent quality control box to box.

Technical Specifications

  • Inside Diameter: 2-1/8"
  • Wall Thickness: 3/8"
  • Individual Piece Length: 6' sections
  • Total Length: 90 ft.
  • Country of Origin: United States

Typical Applications

  • Insulating Hot and Cold Water Supply Lines
  • Condensation Control on Exposed Plumbing Pipe
  • Freeze Protection for Piping in Unconditioned Spaces
  • Residential and Commercial Rough-In Plumbing
  • New Construction and Retrofit Insulation Projects
  • Mechanical Rooms and Basement Pipe Runs Where Sweating Pipes Are a Concern

Why Sioux Chief?

Sioux Chief builds rough-in plumbing supplies for professional installation, and the 663 self-seal pipe insulation sleeve reflects that same focus on practical, job-ready design. The self-sealing seam and pre-sized 2-1/8" ID x 3/8" wall construction help plumbers move through pipe insulation runs efficiently instead of stopping to tape or glue every section by hand. Delivering 90 ft. in 6' sections keeps trucks and shelves stocked for crews running multiple jobs at once. Combined with U.S. manufacturing that supports consistent quality control from box to box, the Sioux Chief 663 is a straightforward choice for reliable, ready-to-install pipe insulation on your next rough-in or retrofit job.

Product Specs

Country Of Origin:
United States
Cubic Volume:
7.52596932
Product Type:
Pipe Insulation Sleeve
Configuration:
Self-Seal
Department:
Plumbing
Product Group:
Rough-In and Supports
Product Subgroup:
Pipe and Tubing
Product Size:
2-1/8" ID x 3/8" Wall
Package Quantity:
15

Sioux Chief 663-21838SS – Frequently Asked Questions

1) What size pipe does the Sioux Chief 663-21838SS insulation fit?
The 663-21838SS sleeve has a 2-1/8 inch inside diameter, so it slips over pipe or tube with a 2-1/8 inch outside diameter. Wall thickness is 3/8 inch. If your copper measures a different OD, you need a different ID in the 663 family, not this one.
2) Do I need tape or contact cement to close this pipe insulation?
No. The 663 is a self-seal sleeve, meaning the slit seam carries its own adhesive strip. Peel the liner, press the seam shut around the pipe, and the section is closed, no tape, glue, or staples. Butt joints between 6 foot sections are still worth taping if you want a continuous vapor seal on cold lines.
3) Can I install this self-seal insulation on pipe that is already in place?
Yes, that is the point of the slit, self-sealing design. Because the sleeve opens along its length and reseals with its own adhesive, you can wrap existing runs without breaking into the piping. Retrofit insulation work is a stated application alongside new rough-in.
4) Will this insulation work on PEX and CPVC, or only copper?
Copper, CPVC, and PEX water lines are all covered, as long as the tube measures 2-1/8 inches on the outside to match the sleeve ID. It runs on exposed or concealed lines either way.
5) How much insulation comes in a carton of 663-21838SS, and how long are the pieces?
One carton gives you 90 feet total, made up of 15 pieces at 6 feet each. That is enough to do a long basement or mechanical room run without splitting cartons across jobs.
6) Is 3/8 inch wall insulation enough for sweating cold water pipe in a basement?
The 663 at 3/8 inch wall is the standard thickness plumbers run for condensation control and light freeze protection on domestic water lines in unconditioned spaces, and those are the listed applications. For chilled water or heavy mechanical duty where a spec calls out a thicker wall, you would move up in wall thickness rather than use this one.
7) What is the Sioux Chief part number for 2-1/8 inch self-seal insulation?
Order 663-21838SS. The number reads out as the 663 series, 2-1/8 inch ID, 3/8 inch wall, SS for self-seal.
How fast can I get the Sioux Chief 663-21838SS 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 663-21838SS come with a warranty?
Absolutely. The Sioux Chief 663-21838SS 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 663-21838SS?
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 663-21838SS from ZenSupply?
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