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Bronze sweat union elbow fitting with 3/4 inch connection

Legend Valve

Legend Valve 110-166 3/4" S-438 Sweat Union Elbow accessory

SKU CH-XXBY-QFZ6W

A 3/4 inch bronze sweat union elbow for joining copper pipe at a right angle

  • 3/4" sweat bronze union elbow for secure copper pipe connections
  • S-438 model fits standard hydronic heating and cooling systems
  • New Legend Valve fitting ensures reliable joint integrity
  • 110-166 part number simplifies ordering and project specification
  • California Proposition 65 warning notes chemical exposure risk

Legend Valve 110-166 Sweat Union Elbow

The Legend Valve 110-166 is a 3/4 inch S-438 sweat union elbow designed for joining copper tubing in hydronic heating systems. Its bronze construction provides reliable durability for boiler and radiator installations. The sweat connection ensures a permanent, leak-free joint when soldered correctly. This accessory suits professional HVAC technicians and experienced DIYers.

Suits closed-loop hydronic heating installations

This elbow fits installers needing a 3/4 inch sweat union elbow for standard hydronic loops. It is not intended for potable water supply lines or high-pressure steam applications. Buyers requiring press-fit, threaded, or compression connections should look at alternative fitting types. The product contains chemicals listed under California Proposition 65.

3/4 inch sweat connection determines compatibility

The 3/4 inch nominal diameter and sweat-end design are the critical specifications for matching existing copper pipework. Verify that your tubing matches this size before purchasing. The S-438 model designation identifies the specific union elbow pattern within the Legend Valve range. No other dimensions or pressure ratings are provided in the data.

How it compares

Measured against everything we stock in Radiator Fans & Boiler Parts, at today’s prices. Recalculated every night.

Price $11.99
Cheaper than about 87% of the 95 comparable items (median $25.99).

Specifications

Product
Brand nameLEGEND VALVE

Questions about this item

How often will the sweat joint on this 3/4" bronze union elbow need re-soldering?

A properly made sweat joint on bronze is permanent under normal hydronic conditions; re-soldering is only required if the original joint was faulty or the pipe is later modified.

What pressure or temperature limit is reached first during continuous operation of this elbow?

The bronze body and union nut typically exceed standard hydronic limits, so system design pressure and boiler aquastat settings become the governing constraints.

Does the elbow itself generate noise or heat when the system runs all day?

The fitting adds no mechanical noise and only conducts the fluid temperature; any audible flow noise or surface heat comes from the connected piping and pump.

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