This Waterway heater split nut (415-4051) is a critical replacement component for spa heating systems, designed to secure heater unions and maintain watertight connections in your hot tub's plumbing assembly. The 1-1/2" FBT (female buttress thread) black split nut ensures proper alignment and sealing of heater connections, preventing costly leaks and maintaining optimal heating performance in compatible Waterway heating systems.
Engineered to OEM specifications, this genuine Waterway split nut delivers the exact fit guaranteed you need for reliable repairs. We ship same-day from our Canadian warehouse and back every part with our comprehensive 1-year warranty, giving you confidence in your spa maintenance investment. Note that screws are sold separately for this split nut assembly. Always verify thread size and compatibility with your existing heater union before installation to ensure proper fit and seal integrity.