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Bronze straight adapter, FTG three-quarter MNPT half, one fifteen-sixteenths inches long

Viega

Viega 79390 Bronze Straight Adapter FTG 3/4 MNPT 1/2

SKU CH-5YV0-5RP55 MPN 79390

Connects 3/4-inch copper tube to 1/2-inch male pipe thread with bronze straight adapter rated for 200 psi and 250 degrees Fahrenheit

  • TypeDrain Components
  • MaterialHAWA
  • Straight adapter connects 3/4 in copper tube to 1/2 in MNPT
  • Bronze body resists corrosion in potable-water systems
  • EPDM O-ring seals reliably up to 250 °F
  • Rated for 200 psi maximum operating pressure
  • Compact 1 15/16 in overall length fits tight spaces

Bronze Straight Adapter for Potable Water Systems

The Viega 79390 is a bronze straight adapter designed for potable water applications. It connects a 3/4 inch FTG copper tube to a 1/2 inch MNPT pipe thread. This fitting suits plumbers and maintenance teams joining dissimilar pipe types in residential or commercial supply lines.

Bronze Construction with EPDM O-Ring Seal

The adapter body is made from bronze for corrosion resistance in water systems. An EPDM O-ring provides the seal at the crimp connection without requiring solder or flux. The straight shape keeps the flow path direct and the overall length measures 1 15/16 inches for tight installations.

Rated for 200 psi at 250 Degrees F

This fitting withstands a maximum operating pressure of 200 psi and a maximum operating temperature of 250 degrees F. It is not intended for gas, oil, or high-pressure hydraulic circuits beyond those limits. Buyers needing higher pressure ratings or different connection types must select an alternative fitting.

Highlights

  • Straight adapter connects 3/4 in copper tube to 1/2 in MNPT
  • Bronze body resists corrosion in potable-water systems
  • EPDM O-ring seals reliably up to 250 °F
  • Rated for 200 psi maximum operating pressure
  • Compact 1 15/16 in overall length fits tight spaces

Specifications

TypeDrain Components
MaterialHAWA
BrandViega
Model79390

Questions about this item

What does the 200 psi pressure rating mean for potable-water systems?

The 200 psi maximum operating pressure is the design limit for this bronze straight adapter in potable-water installations; the system pressure must stay at or below that value.

How much clearance does the 1 15/16 in overall length require inside a wall cavity?

The adapter measures 1 15/16 in end-to-end, so allow at least that much straight run plus room for the crimp tool to engage the FTG end.

Which steps are required to crimp the FTG 3/4 in end correctly?

Cut the copper tube square, deburr, slide the fitting on to the 3/4 in tube stop, position the crimp ring, and complete the crimp with a calibrated Viega tool before pressure testing.

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