UNST7800 7/8" Copper Union Straight Connector

The UNST7800 is a 7/8" copper union straight designed for quick, secure, and serviceable joins on refrigeration and air conditioning pipework. It provides a reliable, leak-resistant connection for installations, repairs, and extensions on linesets used in split, multi-split and VRF/VRV systems. Available from airconspares.com with UK-focused support and fast delivery.

Key benefits

• Fast installation: simple, repeatable joining of 7/8" copper tube.
• Serviceable design: allows disassembly for maintenance or component swaps.
• Consistent seal: precision-made components help minimise the risk of leaks.
• Durable build: corrosion-resistant materials for long service life.
• HVAC/R ready: suited to common UK air conditioning and refrigeration applications.

Typical applications

• Joining or extending 7/8" copper suction lines
• On-site repairs where heat/brazing is impractical
• System modifications and retrofit work

Specification

• Product code: UNST7800
• Type: Union Straight (inline)
• Pipe size: 7/8" (outside diameter)
• Material: Copper fitting with precision mating surfaces
• Use: Air conditioning & refrigeration copper pipe connections

Installation guidance

• Confirm pipe outside diameter is 7/8" and cut square.
• Deburr and clean tube ends; ensure mating faces are free from damage.
• Assemble components hand-tight, then torque to manufacturer-appropriate guidance.
• Pressure test and leak check the joint before commissioning.

Good to know

• Match union type and size to your line location (suction/liquid) and pipe OD.
• For reducers, elbows, or multi-angle solutions, see related fittings in the same category.
• Trade and bulk pricing available on request from our UK team.

Order UNST7800 online at airconspares.com for dependable fittings, competitive pricing, and quick UK dispatch.