Sioux Chief 645X Type L Copper...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$14.87
Sioux Chief 645X Type L Copper PEX x PVC Transition Coupling, 3/4" - 1"

Sioux Chief 645X Type L Copper PEX x PVC Transition Coupling, 3/4" - 1"

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Model: 645X34P

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

$14.87
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Sioux Chief 645X Type L Copper PEX x PVC Transition Coupling, 3/4" - 1"

The Sioux Chief 645X is a Type L copper PEX x PVC water service transition coupling built to bridge PEX and PVC piping at the water service entry point. Available in 3/4" and 1" sizes to match common residential and light commercial water service configurations, this coupling is designed for cold water applications only, not to exceed 140°F, keeping the transition point secure whether installed behind a wall or below grade.

Key Features

  • Trade Size Range: Available in 3/4" and 1" sizes, covering the trade sizes used at typical water service entry points.
  • Durable Construction: Made from Type L copper tube for a corrosion-resistant, long-lasting connection between PEX and PVC piping.
  • PEX-to-PVC Transition: Purpose-built to bridge PEX and PVC pipe materials at the water service entry, simplifying transitions during installation or repair.
  • Cold Water Rated: Designed for cold water applications only; do not exceed 140°F to protect the integrity of the connection.
  • Water Service Ready: Suited for water service line transitions in residential and light commercial plumbing systems.
  • Secure Transition Point: Provides a stable junction where PEX supply lines meet PVC water service piping underground or at the point of entry.
  • PEX x PVC Configuration: Built specifically for a PEX x PVC transition, so installers do not need separate adapters to make the connection.

Technical Specifications

  • Trade Size Range: 3/4" - 1"
  • Material: Type L Copper Tube
  • Configuration: PEX x PVC Transition
  • Maximum Operating Temperature: 140°F (cold water use only)
  • Country of Origin: United States

Typical Applications

  • Water Service Line Transitions
  • PEX-to-PVC Pipe Connections
  • Residential and Light Commercial Plumbing
  • Cold Water Distribution Systems
  • Plumbing Repair and Retrofit Projects
  • New Construction Water Service Installations

Why Sioux Chief?

Sioux Chief builds water service transition fittings from durable Type L copper tube to deliver dependable, corrosion-resistant connections between PEX and PVC piping. The 645X coupling, available across the 3/4" to 1" size range, gives plumbers and contractors a straightforward way to transition water service lines while maintaining a secure, long-lasting joint for cold water applications up to 140°F at the point of entry.

Product Specs

Country Of Origin:
United States
Cubic Volume:
0.1650978
Product Type:
Transition Coupling
Configuration:
PEX x PVC Transition
Department:
Plumbing
Product Group:
Rough-In and Supports
Product Subgroup:
Fittings and Valves
Product Material:
Type L Copper
Country of Origin:
USA

Sioux Chief 645X34P – Frequently Asked Questions

1) Can the Sioux Chief 645X PEX x PVC coupling be used on a hot water line?
No. The 645X is a cold water fitting only, with a maximum operating temperature of 140 degrees F. Use it on water service and cold distribution runs. For hot water PEX transitions you need a fitting rated for continuous hot supply, not this one.
2) What sizes does the Sioux Chief 645X transition coupling come in, and which one matches a typical house service line?
Two trade sizes: 3/4 inch (part 645X34P) and 1 inch (645X4P). Those are the two sizes used at most residential and light commercial water service entries, so match the coupling to the service pipe size already in the ground rather than the interior distribution size.
3) I need to tie new PEX water service into existing PVC. Do I need a separate adapter with the 645X?
No separate adapter. The 645X is built as a single PEX x PVC transition, so one fitting makes the material change at the point of entry. One end takes PEX, the other takes PVC.
4) Is the Sioux Chief 645X coupling okay to bury below grade?
Yes, it is intended for water service line transitions below grade or at the point of entry. The body is Type L copper tube, which gives it corrosion resistance for buried or in-wall service.
5) Is the Sioux Chief 645X made in the USA?
Yes, country of origin on the 645X transition coupling is the United States. That matters on jobs with domestic sourcing requirements on the procurement side.
6) Will the 645X work for a repair on an existing water service, or is it new construction only?
Both. The 645X is used on new water service installs and on repair or retrofit work where a PEX run has to meet existing PVC service pipe. Just keep it to cold water, 140 degrees F maximum.
How fast can I get the Sioux Chief 645X34P 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 645X34P come with a warranty?
Absolutely. The Sioux Chief 645X34P 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 645X34P?
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 645X34P from ZenSupply?
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