The 400-5421 heater split nut is a specific type of nut used in heater systems.
Here’s a detailed description, its use, and application:
Description: The 400-5421 heater split nut is a 2" split nut. It comes with screws and is specifically designed to repair cracked and brittle heater unions without having to replace the entire heater. It works with virtually all heaters that have a 2" union connection.
Use: This split nut is used to repair cracked and brittle heater unions. It’s a compression nut with two screws for heater tailpieces. It’s important to note that heater split nuts are different from pump split nuts.
Application: The 400-5421 heater split nut fits brands such as Balboa, Gecko, Spa Builders, Therm Products, RMF, and Challenger, and is suitable for use with stainless steel hot tub heater tubes. It fits union threads referenced as 2 inches (actual threads 3") on hot tub heater tube brands: Balboa, Gecko, ThermProducts, and HydroQuip. Please note that it does not fit any brand or style of inflatable or soft-side spas or pools.
