🔧 What this part is
Split Nut, Balboa, Heater Union, Black, Less Screws, part number 50086. The split nut clamps a union or heater connection together and is the part that usually cracks or seizes.
Connections: union.
✅ Check before you order
- The connections have to match: union.
- The number on the old part should read 50086, or the maker’s equivalent.
- Not sure? Send us a photo of the old part and any number on it, and we will tell you whether this is the one.








