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Bronze ProPress adapter with press-fit and MNPT ends

Viega

Viega 79250 ProPress adapter 1 in x 1-1/4 in trap

SKU CH-F8BK-41HB1 MPN 79250

Bronze ProPress adapter joins 1 in press-fit copper to 1 1/4 in MNPT for potable water at 200 psi and 250 Degrees F

  • Product typeDrain Components
  • Main materialHAWA
  • Bronze construction resists corrosion for long service life
  • Press-fit connection eliminates open-flame soldering on potable lines
  • EPDM O-ring seals reliably up to 250 °F
  • Rated to 200 psi for demanding water systems
  • Meets ASTM B75 and ASTM B88 material standards

ProPress Bronze Adapter for Press-to-Thread

This ProPress adapter joins a 1-inch copper press connection to a 1-1/4-inch male NPT thread. The bronze body and EPDM O-ring are rated for potable water service at up to 200 psi and 250 degrees F. It provides a straight, flameless transition in copper piping systems. The fitting meets ASTM B75 and B88 standards for material quality.

Installers Using Viega Press Tools on Mixed-Size

Plumbers equipped with Viega ProPress jaws can make this connection quickly without soldering or threading copper pipe. The adapter suits repairs and new installations where a threaded valve or component follows a press-fit line. It does not serve installers who lack press tools, who need a female thread, or who are joining dissimilar metals such as steel or plastic.

1-Inch Press to 1-1/4-Inch Male NPT End

The critical specification is the combination of a 1-inch copper tube size press end and a 1-1/4-inch male NPT thread end. This exact pairing determines whether the adapter fits the pipe and the mating component in the system. Verifying both diameters and the thread gender against the job plan confirms compatibility before purchase.

How it compares

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

Price $26.99
Cheaper than about 56% of the 4,240 comparable items (median $31.99).

Specifications

Product
Brand nameViega
Model name79250
Product typeDrain Components
Size & build
Main materialHAWA

Questions about this item

How do I confirm the ProPress adapter is sealing correctly after pressing?

Press the fitting with a Viega-approved jaw until the indicator ring shows full engagement, then pressurise the system to the 200 psi rating and inspect the EPDM O-ring joint for leaks.

What comes with the 79250 adapter and what must I supply?

The box contains the bronze straight adapter with its factory-fitted EPDM O-ring; you must provide Type K, L or M copper tube at the 1 in press end and 1-1/4 in male NPT pipe or fitting at the other end.

Which size combination should I select for a 1 in copper line transitioning to 1-1/4 in male threads?

Choose the 79250 model — its press side is sized for 1 in copper tube and its threaded side is 1-1/4 in MNPT, matching that exact transition.

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