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TACO 110-557 Bronze Union with 3/4 in Sweat Connection - Unions
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TACO 110-557 Bronze Union with 3/4 in Sweat Connection

The TACO Union: 3/4 in is a bronze union with a 3/4 in sweat connection, including a tail piece and an EPDM gasket. It is compatible with manufacturer model number 003-BC4-PNP and carries manufacturer part number…

SKU 3G-OTH-81244

Also listed as: 110557 · 110 557

Brand
TACO
Item
110-557 Bronze Union with 3/4 in Sweat Connection
Part Number
110-557
Category
Unions
Available to Order
Also known as:110-557TACO
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Technical Specifications

TACO
Manufacturer Part Number
110-557
Type
110-557, Compatible with Part No. 33HM88/4JB21, Union
Sweat
3/4 in
Includes
Tail Piece
Body Material
Bronze
Gasket Material
EPDM
Compatible with Manufacturer Model Number
003-BC4-PNP

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TACO Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The TACO Union: 3/4 in is a bronze union with a 3/4 in sweat connection, including a tail piece and an EPDM gasket. It is compatible with manufacturer model number 003-BC4-PNP and carries manufacturer part number 110-557.

Frequently Asked Questions

What is the TACO 110-557 union used for?

The TACO 110-557 union connects and disconnects piping in hydronic heating and cooling systems. Its bronze body resists corrosion, and the EPDM gasket provides a reliable seal in water and glycol applications. It is commonly used with circulator pumps like the TACO 003-BC4-PNP.

What are the specifications of the TACO 110-557 union?

The TACO 110-557 union has a 3/4 in sweat connection, a bronze body, and an EPDM gasket. It includes a tail piece and is compatible with TACO model 003-BC4-PNP. The manufacturer part number is 110-557, and it also cross-references part numbers 003-BC4-PNP and 006-BC7-IFC.

Where to buy the TACO 110-557 union worldwide?

3G Electric supplies the TACO 110-557 union to customers worldwide. We handle full logistics, customs clearance, and delivery to your site. As a global industrial solutions provider, we source genuine TACO parts and provide reliable support for your hydronic system needs.

How to install the TACO 110-557 union?

Install the TACO 110-557 union by soldering the sweat ends onto clean, fluxed copper pipe. Ensure the EPDM gasket is properly seated between the union halves before tightening the nut. Avoid overheating the bronze body during soldering to prevent damage. Always follow local plumbing codes.

Used in

Common applications for TACO
Hydronic heating systems — Taco 49-150T-2 inline air separator removes entrained air to maintain loop efficiency.
Domestic hot water recirculation — Taco HLS-1 under-sink pump reduces wait time at fixtures in residential buildings.
Chilled water cooling loops — Taco SFL-150S isolation flange allows equipment service without system drain.
Circulator pump maintenance — Taco 110-009RP motor coupler restores torque transfer in Series 110 pumps.
Water/glycol systems — Taco 49-200T-2 air separator handles 2 in NPT connections at 150 psi and 240°F.
Commercial hydronic balancing — Taco air separators and isolation flanges support efficient fluid control and serviceability.
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TACO Products

3G Electric supplies TACO unions. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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