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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

  • Product typeDrain Components
  • Main 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.

How it compares

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

Price $23.99
Cheaper than about 59% of the 4,240 comparable items (median $31.99).

Specifications

Product
Brand nameViega
Model name79390
Product typeDrain Components
Size & build
Main materialHAWA

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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