Hayward Multiport Valve Union Kit 40mm – Set of 3 (SP24X40AUUNPAK)

Genuine Hayward Multiport Valve Union Kit 40mm — part no. SP24X40AUUNPAK. This kit provides a complete set of three 40mm unions for connecting pipework to your Hayward multiport valve (MPV). Each union includes a threaded tail, union tail, lock nut, and two O-rings — everything needed for a leak-free connection on all three ports.

Replacing worn or leaking union components restores a watertight seal and prevents water loss at the valve connections. This is a genuine Hayward spare part — not aftermarket.

Compatible Hayward Multiport Valves

• SP0710
• SP0710X
• SP0711
• SP0712
• SP0714T

Kit Contents (per set of 3)

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

Product Details

• Genuine Hayward spare part — not aftermarket
• Part number: SP24X40AUUNPAK
• Connection size: 40mm
• Quantity: Set of 3 complete unions
• SKU: SP24X40AUUNPAK

Frequently Asked Questions

What is a multiport valve union and why does it need replacing?

A multiport valve union is the threaded fitting that connects your pool pipework to the inlet and outlet ports of the multiport valve. Over time, the O-rings compress and harden, the union tails can crack, and the lock nuts can strip — all of which cause leaks at the valve connections. Replacing the full union kit restores a watertight seal and prevents water loss.

Does this kit include O-rings?

Yes — each union in the kit includes both a threaded union O-ring and a tail union O-ring, so you have everything needed for a complete, leak-free installation without sourcing additional parts.

Which Hayward multiport valves does this fit?

This union kit (SP24X40AUUNPAK) is compatible with Hayward 40mm multiport valves: SP0710, SP0710X, SP0711, SP0712, and SP0714T. If you have a different Hayward MPV model or a 50mm valve, contact us to confirm the correct part before ordering.

Why buy a set of 3 rather than individual unions?

Hayward multiport valves typically have three pipe connections (inlet, outlet, and waste/backwash). Replacing all three unions at the same time ensures consistent sealing across all ports and avoids having to revisit the valve again shortly after for a second union failure.

Is this a genuine Hayward part?

Yes — this is a 100% genuine OEM Hayward replacement union kit, not a generic alternative. Genuine parts ensure correct thread pitch, O-ring sizing, and material compatibility with your Hayward multiport valve.