A tailpiece with split nut helps create a more service-friendly plumbing connection at the heater, and this Coates OEM part is designed for compatible heater applications where the original tailpiece has cracked, worn, or become unreliable. When a heater-side connection point begins to weaken, the entire plumbing relationship can feel less dependable than it should. The OEM fit and split nut design give this part practical value because heater plumbing fittings work best when they match the original connection format closely. A properly selected replacement helps restore intended connection support while preserving easier service access at the heater body. This type of fitting is especially useful when the heater and surrounding plumbing remain serviceable and the issue is centered on the tailpiece itself. That keeps the repair direct and efficient. Installed in the proper setup, this tailpiece helps restore dependable heater plumbing support and contributes to a cleaner repair overall. OEM tailpiece with split nut for compatible Coates heater applications Helps restore a secure and serviceable heater-side connection Useful when original tailpieces are cracked or worn Supports easier maintenance access Improves plumbing confidence and repair quality