The 28mm × 1" End Feed Straight Cylinder Union connects 28mm copper to a 1" BSP male boss with a swivel union nut — soldered capillary joint on the copper end, threaded union on the other. The union lets the pipework be disconnected without unsoldering — used on 28mm primaries onto 1" cylinder and plant bosses. Manufactured to BS EN 1254 and fits copper tube to BS EN 1057.

Also known as: straight cylinder union, cylinder connector, union adaptor, straight union connector, tank union.

• Manufactured to BS EN 1254 for capillary (solder) fittings
• Straight cylinder union — 28mm copper × 1" BSP union nut
• Fits copper tube to BS EN 1057
• WRAS approved
• Solder and flux required — not supplied; fibre washer or PTFE for the union joint
• Sold individually — buy exactly what the job needs
• Suitable for hot and cold water and heating services

End feed means a capillary joint: clean the tube and fitting, apply flux, heat evenly and feed lead-free solder to the mouth of the fitting until a ring forms. See our guide: How to solder end feed fittings.

Also in this range: couplers, elbows and the full end feed range. Ordering for a whole job? Use the bulk fittings matrix.