Hayward Union Connector Replacement Kit for TriStar NorthStar EcoStar Pumps SPX3200UNKIT — OEM-fit, leak-resistant union

Hayward's SPX3200UNKIT is a direct-fit union connector replacement kit made to restore secure, leak-resistant connections on select TriStar, NorthStar and EcoStar pumps and compatible heaters and filters.

When a union connector fails, the result can be leaking, vibration and premature equipment wear. This kit provides the OEM-style union parts engineered for Hayward TriStar (SP3200-series, SP3600) and NorthStar (SP4000-series) pumps, and it also fits a range of EcoStar pumps, Universal H-series low-NOx heaters and cartridge filters. At about 4 pounds, the replacement parts are durable, sized to match original fittings and intended to simplify service without needing a full pump swap.

Which Hayward models does this union connector kit fit?

The SPX3200UNKIT is built to match the unions used on many Hayward TriStar and NorthStar pump models as well as select EcoStar and heater or filter models. Check your pump model tag against the listed compatibility to confirm fit before ordering.

• TriStar models: SP3200EE, SP3200X, SP3600 and multiple SP32xx and SP36xx variants.
• NorthStar/NS models: SP4000, SP4000X and SP4005–SP4030 series variants.
• Also compatible: Hayward EcoStar SP3400VSPVR, and cartridge filter/heater models like C5030 and Universal H-series.

How does the replacement kit improve pump performance?

Replacing a worn or cracked union connector restores a tight, vibration-resistant joint between plumbing and the pump housing. That reduces the risk of leaks, improves system efficiency and helps the pump maintain intended flow without introducing cavitation caused by air leaks.

• Re-establishes factory-sealed union connection to prevent water loss.
• Reduces vibration transfer to plumbing for quieter operation.
• Prevents air intrusion that can degrade pump prime and flow.

What should I know about installation and compatibility checks?

Installation is straightforward for users familiar with basic pool equipment service; the kit replaces the union parts without altering original plumbing. However, confirm model numbers, union size and thread type before purchase, and follow safety precautions like shutting off power and draining water as required.

• Verify your pump model on the nameplate matches the kit's compatibility list.
• Shut off power and relieve system pressure before removing the old union.
• Inspect O-rings and mating flange faces; replace any damaged components for a reliable seal.

What materials and dimensions are important for durability?

The replacement connector kit is made to Hayward's OEM standards, using materials suited for pool and spa environments to resist corrosion and wear. The kit's weight (about 4 pounds) reflects the robust components included to match original fit and strength.

• Manufactured to fit OEM union profiles and thread/piping connections.
• Materials selected for chemical and UV resistance common to pool systems.
• Designed to match original sealing surfaces and O-ring grooves for a long-lasting seal.

Who is this for: The Hayward SPX3200UNKIT is for pool and spa owners, service technicians and maintenance professionals who need an OEM-style union replacement for TriStar, NorthStar or compatible EcoStar pumps, heaters and cartridge filters. Choose this kit when the existing union shows cracks, leaks or loose joints but the pump body and motor are otherwise sound — it’s a cost-effective way to restore a factory-quality connection without replacing the entire pump.