We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Straight bronze press-fit union fitting with MNPT end

Viega

Viega 79730 Straight Bronze Press-Fit 1/2in MNPT 1/2in Trap

SKU CH-7E04-VXAMV MPN 79730

Bronze straight union joins 1/2 in press-fit to 1/2 in MNPT for potable water at 200 psi and 250 °F

  • Product typeDrain Components
  • Main materialHAWA
  • Press-fit connection eliminates open-flame soldering on potable water lines
  • Bronze body with EPDM O-ring rated for 200 psi and 250 °F service
  • Straight union joins 1/2 in press-fit to 1/2 in MNPT in 2 11/16 in length
  • Complies with ASTM B75 and ASTM B88 for copper tube applications
  • Ready for immediate installation on new residential or commercial plumbing systems

Straight Bronze Press-Fit Union

The Viega 79730 is a straight bronze union that joins a 1/2 in copper tube via press-fit to a 1/2 in male NPT thread. It suits potable-water systems and installs with standard press tools, eliminating open-flame soldering on site.

Replaces Soldered Copper Unions

This fitting replaces a traditional soldered copper union where flame-free installation is required or where local codes prohibit open flame. The jump is worth it when a quick, reliable mechanical joint reduces labour time and avoids heat damage to surrounding materials.

Sustained Pressure and Temperature Performance

Rated for a maximum operating pressure of 200 psi and a maximum operating temperature of 250 degrees F, the bronze body and EPDM O-ring maintain a seal under continuous hot-water circulation. Compliance with ASTM B75 and ASTM B88 confirms material suitability for long-term service.

How it compares

Measured against everything we stock in Drain Stoppers, Strainers & Traps, at today’s prices. Recalculated every night.

Price $21.99
Cheaper than about 62% of the 4,240 comparable items (median $31.99).

Specifications

Product
Brand nameViega
Model name79730
Product typeDrain Components
Size & build
Main materialHAWA

Questions about this item

What copper tube size and thread type does the 79730 fitting accept for a watertight connection?

The press-fit end is sized for 1/2 in copper tube and the opposite end provides a 1/2 in MNPT thread for direct pipe engagement.

Which tool and jaw profile are required to press the 79730 fitting, and what common step is missed?

Use a Viega-approved press tool with the correct jaw for 1/2 in bronze; the step often missed is fully seating the tube to the internal stop before pressing.

When should the EPDM O-ring in the 79730 fitting be inspected or replaced?

Inspect the EPDM O-ring during any system service or if leakage appears; replace it if it shows hardening, cracking, or permanent deformation from prolonged exposure to 250 Degrees F water.

More in Drain Stoppers, Strainers & Traps

Similar items