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Small copper press-fit cap with EPDM O-ring, 3/4 inch fitting

Viega

Viega ProPress 2956 Copper Cap 3/4 in

SKU CH-8JKX-2W498

Copper press-fit cap for 3/4 in tube, rated 200 psi at 250 Degrees F with EPDM seal and multiple certifications

  • Press-fit copper cap seals 3/4 in tube without solder
  • EPDM O-ring rated 200 psi and 250 °F for potable water
  • Certified to NSF/ANSI 61 and 372 for drinking-water safety
  • Listed by CSA, UL, FM, ICC and IAPMO UPC
  • Compact 1 1/16 in length fits tight plumbing spaces

Application and fit

This Viega ProPress 2956 copper cap terminates a 3/4 in copper tube in potable water systems. The press-fit connection installs without solder, flux or open flame, so it suits installers who need a permanent, leak-free end stop on new or retrofit lines.

Thermal and pressure limits

The fitting withstands 200 psi maximum operating pressure and temperatures from 0 to 250 degrees F, with an EPDM O-ring that maintains its seal across that range. Copper construction handles the thermal expansion of hot water loops without fatigue.

Standards and compliance

Listings include CRN, CSA, FM, IAPMO UPC, ICC, NFPA 13D, NFPA 13R, NSF/ANSI 61 and NSF/ANSI 372, plus UL and PHCC acceptance. These approvals satisfy code officials for potable water, fire sprinkler and hydronic heating installations where lead-free and low-lead mandates apply.

Highlights

  • Press-fit copper cap seals 3/4 in tube without solder
  • EPDM O-ring rated 200 psi and 250 °F for potable water
  • Certified to NSF/ANSI 61 and 372 for drinking-water safety
  • Listed by CSA, UL, FM, ICC and IAPMO UPC
  • Compact 1 1/16 in length fits tight plumbing spaces

Specifications

BrandViega

Questions about this item

How is the 3/4 in copper cap pressed onto the tube and which step is often missed?

Calibrate the tube end, slide the cap until it hits the internal stop, then press with a ProPress jaw; skipping calibration causes leaks.

What part will need replacement after years of hot water service?

The EPDM O-ring can harden over time at temperatures up to 250 Degrees F and should be inspected during system maintenance.

At what pressure does the fitting reach its rated limit during continuous operation?

The maximum operating pressure is 200 psi; sustained pressure above this value exceeds the design rating.

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