The Waterway 417-4090 Heater Union Tailpiece is a critical plumbing component that connects your spa's heater system to the main circulation lines. This OEM replacement part fits Waterway heaters and features 1-1/2" male buttress thread (MBT) on one end and 1-1/2" slip connection on the other, ensuring secure water flow between your heater and plumbing system.
Built to Waterway's original specifications, this tailpiece delivers the exact fit you need to restore proper heater operation and prevent costly leaks. At Bubbles Supply, we guarantee this part will fit your system perfectly, ship the same day you order, and back it with our full 1-year warranty. Whether you're dealing with a leaking connection or replacing worn components during routine maintenance, this genuine Waterway part ensures reliable performance. Always verify your existing tailpiece dimensions and thread type before installation to confirm proper fitment.