Valves and unions need secure fitment to prevent leaks and keep equipment serviceable, and this H-Series 135K Union Kit is a useful Hayward replacement for that purpose. It supports proper assembly, easier servicing, and dependable water flow in compatible Hayward pool equipment installations.Use this part when servicing compatible Hayward systems and compare the existing component, equipment model, and plumbing configuration before installation. Correct replacement parts help reduce downtime, protect connected equipment, and keep pool or spa systems easier to maintain through the season. For compatible Hayward valve or plumbing assemblies Helps maintain secure connections and flow control Useful for leaks, cracked parts, or worn hardware Supports easier equipment service Part number helps confirm the correct fit Replacement part number: IDXLUKT1135.