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TACO 110-251SF Stainless Steel Flange Union, 3/4 in NPT, 2 Flanges, 4 Bolts

The TACO 110-251SF is a stainless steel flange union with a 3/4 inch NPT connection, supplied as a set of two flanges. This product includes four bolts and is identified by manufacturer part number 110-251SF and SKU…

SKU 3G-OTH-81230

Also listed as: 110251SF · 110 251SF

Brand
TACO
Item
110-251SF Stainless Steel Flange Union, 3/4 in NPT, 2 Flanges, 4 Bolts
Part Number
110-251SF
Category
Unions
Available to Order
Also known as:110-251SFTACO
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Technical Specifications

TACO
Manufacturer Part Number
110-251SF
Includes
(4) Bolts
Body Material
Stainless Steel

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

Product Description

The TACO 110-251SF is a stainless steel flange union with a 3/4 inch NPT connection, supplied as a set of two flanges. This product includes four bolts and is identified by manufacturer part number 110-251SF and SKU 110-251SF.

Frequently Asked Questions

What is the TACO 110-251SF flange union used for?

The TACO 110-251SF is a stainless steel flange union used to connect and disconnect piping in industrial HVAC and plumbing systems. It provides a secure, leak-resistant joint for 3/4 inch NPT connections, commonly applied in water circulation and heating loops where maintenance access is needed.

What are the specifications of the TACO 110-251SF?

The TACO 110-251SF is a 3/4 inch NPT flange union made of stainless steel. It includes two flanges and four bolts. The manufacturer part number is 110-251SF, and the SKU is 3G-OTH-81230. This set is designed for durable, corrosion-resistant connections in industrial piping systems.

Where to buy the TACO 110-251SF worldwide?

You can source the TACO 110-251SF flange union through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time; we supply this TACO part to procurement teams internationally.

How to install the TACO 110-251SF flange union?

To install the TACO 110-251SF, align the two flanges over the pipe ends, insert the four included bolts, and tighten evenly in a cross pattern to ensure a uniform seal. Use a torque wrench to avoid over-tightening. Always follow standard piping practices for stainless steel connections.

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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Compatible alternatives & equivalents

Cross-referenced by specification & description
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TACO
Standard flange set for connecting piping in fluid-handling systems. Includes two flanges and a bolt. Body is cast iron; gasket is PTFE. Connection size is 2 in FNPT
Standard flange with stainless steel body, includes bolt for secure assembly. Compatible with TACO model 110-113 and part numbers 5CHJ9, 5CHK1, 5CHK7. Used in fluid-handling systems such as HVAC and water circulation
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Standard flange with stainless steel body, includes bolt for secure assembly. Compatible with TACO model 110-113 and part numbers 5CHJ9, 5CHK1, 5CHK7. Used in fluid-handling systems such as HVAC and water circulation
TACO
TACO
Isolation flange set for hydronic heating and plumbing systems, used to isolate pumps or valves for maintenance. Includes two flanges and two bolts. Body constructed of brass and steel with EPDM gaskets for a reliable seal in closed-loop water systems
TACO
TACO
Isolation flange for hydronic heating and cooling systems, allowing pump or equipment isolation for maintenance without system drainage. Features 1 1/2 in FNPT connection, brass/steel body, PTFE gasket, and includes nut. Two flanges supplied per unit

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