Speck 90 Complete Union Kit 50mm (PUC-U50/50)

The Speck 90 Complete Union Kit 50mm — SKU PUC-U50/50 — is a complete union assembly for connecting 50mm pipework to Speck pool pumps. The union provides a tool-free, removable pipe connection at the pump inlet or outlet, allowing the pump to be disconnected from the plumbing for servicing or replacement without cutting pipes.

This kit includes all three components needed for a complete union: the threaded lock nut, the union barrel, and the O-ring seal.

Kit Contents

• 1 × Threaded lock nut (knurled, for hand-tightening)
• 1 × Union barrel / body
• 1 × O-ring seal

Product Details

• Brand: Speck
• SKU: PUC-U50/50
• Connection size: 50mm
• Colour: Black
• Compatible with: Speck pool pumps (90 series)
• Complete kit — includes lock nut, barrel, and O-ring

Frequently Asked Questions

What does a pool pump union do?

A pool pump union is a two-part threaded fitting that connects the pump to the pool pipework. One half is glued to the pipe; the other half connects to the pump port. The two halves screw together with a lock nut, compressing an O-ring to create a watertight seal. The key benefit is that the union can be unscrewed by hand to disconnect the pump from the plumbing for servicing, replacement, or winterisation — without cutting or disturbing the pipe.

What does "complete" mean in this kit?

"Complete" means this kit includes all three components of the union assembly: the threaded lock nut, the union barrel/body, and the O-ring seal. Some union listings are for individual components only. This kit has everything needed for a full union installation or replacement.

How do I know if my Speck pump union needs replacing?

Common signs include water leaking at the union joint (around the lock nut), a cracked or brittle union body, a damaged or flattened O-ring, or a lock nut that no longer tightens securely. If the union is leaking, first try replacing the O-ring alone — if the body or nut is cracked, replace the complete kit.

Is this compatible with all Speck pool pumps?

This union kit (PUC-U50/50) is designed for Speck 90 series pool pumps with 50mm connections. Compatibility with other Speck pump models depends on the pump’s port size. Contact us with your pump model to confirm the correct union size before ordering.