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
Bronze ProPress adapter, straight shape, press-fit and threaded ends

Viega

Viega 79355 ProPress adapter 1-1/4" x 1-1/2" trap

SKU CH-RM16-7PCFF MPN 79355

Bronze ProPress adapter connects 1-1/4" press-fit copper tube to 1-1/2" FNPT for potable water systems up to 200 psi and 250 Degrees F

  • TypeDrain Components
  • MaterialBronze
  • Press-fit connection eliminates soldering for faster installation
  • Bronze construction resists corrosion in potable water systems
  • EPDM O-ring seals reliably up to 250 °F
  • Rated for 200 psi maximum operating pressure
  • Meets ASTM B75 and ASTM B88 standards

ProPress adapter for potable water systems

This Viega 79355 adapter joins 1-1/4 inch copper tube to a 1-1/2 inch female NPT thread using a press-fit connection. The bronze body and EPDM O-ring suit potable water installations up to 200 psi and 250 degrees F. It meets ASTM B75 and ASTM B88 standards for copper fittings.

Bronze construction with press-to-thread transition

The straight adapter measures 2 1/8 inches overall and requires a compatible press tool for the copper side while the opposite end accepts standard NPT pipe threads. No bolt holes or flange surfaces are present, keeping the joint compact for tight plumbing runs. The EPDM seal resists hot water and common treatment chemicals.

Replaces soldered or threaded bronze couplings

Installers save time by pressing rather than sweating the copper joint, reducing fire risk and flux residue in potable lines. The jump is worthwhile when a press tool is already on site and local code accepts press fittings for the application. Builders needing a flanged connection or a different pipe diameter should select an alternative fitting.

Highlights

  • Press-fit connection eliminates soldering for faster installation
  • Bronze construction resists corrosion in potable water systems
  • EPDM O-ring seals reliably up to 250 °F
  • Rated for 200 psi maximum operating pressure
  • Meets ASTM B75 and ASTM B88 standards

Specifications

TypeDrain Components
MaterialBronze
BrandViega
Model79355

Questions about this item

What does the ProPress press-fit connection cap at in practice?

The press-fit end is rated to 200 psi and 250 °F, matching ASTM B75 and ASTM B88 limits for potable-water systems.

What clearance does the 2 1/8 in overall length need to fit?

The straight bronze adapter measures 2 1/8 in end-to-end, so allow at least that much straight run between the 1-1/4 in copper tube and the 1-1/2 in FNPT port.

How is the press-fit side installed and what step is often missed?

Use a Viega ProPress jaw on the 1-1/4 in copper tube; the EPDM O-ring seals automatically when pressed — do not apply thread sealant to the press-fit end.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.