The Waterway 415-5161 heater split nut is designed for compatible 2 inch heater union applications and features a universal-fit design. A split nut like this is useful where the heater connection needs to be secured while still remaining easier to service and disassemble when maintenance is required.The universal-fit format makes this Waterway part a practical option for matching a range of compatible heater union setups. Replacing the split nut can help restore a cleaner mechanical hold at the connection point without requiring replacement of the entire surrounding assembly.For compatible heater plumbing repairs, this Waterway split nut is a practical solution when a 2 inch universal-fit union fastener is needed. Waterway 2 inch heater split nut Universal-fit design Designed for compatible heater union applications Helps restore a secure and serviceable connection Useful for repair and maintenance work