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 Class 150 companion flange with copper sweat cup connection, 4.25 inch diameter, four bolt holes

Nibco, Inc.

Nibco, Inc. 771-LF Class 150 Companion Flange

SKU CH-D9M8-JSYM5

A Class 150 bronze companion flange joins 1-inch copper tube to a 4.25-inch flanged connection rated for 395 psi at 200 degrees F

  • Class 150 rating handles 395 psi working pressure
  • Bronze construction resists corrosion in air and non-potable water systems
  • 200 °F maximum temperature suits hot-water and low-pressure steam lines
  • Sweat cup connection fits 1 1/8 in copper tube for leak-free joints
  • Four 5/8 in bolt holes on 4.25 in flange diameter simplify alignment

771-LF Class 150 Bronze Flange

This Class 150 companion flange connects a 1-inch copper tube to a flanged joint in air or non-potable water systems. The sweat fitting accepts a 1 1/8-inch tube outer diameter for a secure soldered connection on the tube side.

Sustained pressure and temperature limits

The bronze body is rated for a maximum operating pressure of 395 psi and a maximum operating temperature of 200 degrees F. These limits define the safe envelope for continuous service rather than short-term peak conditions.

Four-bolt pattern and material implications

A 4.25-inch outside diameter flange with four 5/8-inch bolt holes on a 3/8-inch thick body matches standard Class 150 drilling. Bronze construction resists corrosion in the specified media and allows the flange to be paired with steel or iron counterparts without galvanic concerns.

Highlights

  • Class 150 rating handles 395 psi working pressure
  • Bronze construction resists corrosion in air and non-potable water systems
  • 200 °F maximum temperature suits hot-water and low-pressure steam lines
  • Sweat cup connection fits 1 1/8 in copper tube for leak-free joints
  • Four 5/8 in bolt holes on 4.25 in flange diameter simplify alignment

Specifications

BrandNIBCO

Questions about this item

Does the bronze flange generate noticeable heat or noise when subjected to continuous 200 Degrees F operation?

The fitting is a passive bronze component with no moving parts, so it produces no noise and only conducts the temperature of the fluid passing through it.

What pipe size and joining method are required to connect the 1 in cup end of this Class 150 flange?

The cup end accepts 1 in copper tube with a 1 1/8 in outer diameter and is joined by sweat soldering.

Will the 4.25 in outside diameter and 5/8 in bolt holes match the bolt pattern on my existing Class 150 iron flanges?

Yes, the 4.25 in OD, 3/8 in thickness and four 5/8 in bolt holes follow the standard Class 150 pattern used on cast-iron companion flanges.

Also in this aisle

People compared these

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