🔧 What this part is
Custom Molded Products 3/4In Mip X 3/4In S Union S-S (High-Temp), part number 21063-750-000. A union lets you disconnect a pump, heater or filter without cutting pipe.
Connections: union.
✅ Check before you order
- The connections have to match: union.
- The number on the old part should read 21063-750-000, 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.















