Set of 3 x Hayward MPV Union (50mm)

Hayward MPV Union Pack — 50mm (Set of 3) is the complete union replacement kit for Hayward 50mm multiport valves. Each set includes everything needed to reseal all three valve ports — no hunting for individual parts. Suitable for Hayward SP0715 and SP0716 multiport valves fitted to Hayward S-series sand filters and DE filters.

Compatible Multiport Valves

• SP0715 (50mm)
• SP0716 (50mm)

Compatible Sand Filters

• S244T2C, S270T2C, S310T2C, S360T2C
• S244S, S310S, S360

Compatible DE Filters (check valve size is 20-SP0715XR50)

• DE2420, DE3620, DE4820, DE6020, DE7220

What's Included (per set of 3)

• 3 x 50mm Lock Nuts
• 3 x 50mm Union Tails
• 3 x 50mm–40mm Reducing Union Tails
• 3 x 50mm Threaded Tails
• 3 x 50mm Threaded Union O-rings
• 3 x 50mm Tail Union O-rings

Frequently Asked Questions

Which Hayward multiport valves does this union pack fit?

This 50mm union pack is compatible with Hayward multiport valves SP0715 and SP0716. Always confirm your valve model before ordering.

Why do I need to replace my MPV unions?

Union connections on multiport valves are a common source of leaks as O-rings age, crack, or deform. Replacing the full union set restores a watertight seal and prevents water loss around the valve ports.

Does this pack include O-rings?

Yes — the pack includes both threaded union O-rings and tail union O-rings for all three ports, so you have everything needed for a complete reseal.

Is this suitable for DE filters as well as sand filters?

Yes, but for DE filters you must confirm the valve size is 20-SP0715XR50 before ordering. Compatible DE models include DE2420, DE3620, DE4820, DE6020, and DE7220.

Do I need a plumber to replace Hayward MPV unions?

In most cases this is a DIY-friendly job. Turn off the pump, depressurise the system, unscrew the old unions, and fit the new ones. If your plumbing is glued rather than threaded, you may need a licensed plumber to cut and re-join the pipe.