2″ Female Buttress Thread Split Nut + Serviceable Heater Union Repair
- Genuine Magic Plastics heater-union replacement component
- 2-inch female buttress thread (FBT) split nut set
- Includes the split nut hardware and screws
- Manufacturer part number 0121108020
- Designed for compatible 2-inch heater-union connections
- Useful for replacing a damaged union nut without misidentifying the complete union assembly
The Magic Plastics 0121108020 Heater Split Nut Set is a genuine replacement component for compatible 2-inch heater-union connections that use a female buttress-thread split nut. Magic Plastics lists this exact part as a 2-inch FBT Heater Split Nut Set with screws in its current heater-union component catalog.
This is the split-nut hardware only, not a complete heater union. It is intended for service situations where the existing union connection uses the matching Magic Plastics 2-inch buttress-thread geometry and the nut itself is cracked, stripped, or otherwise damaged.
Best For
- Replacing a cracked or broken 2-inch heater-union split nut
- Repairing compatible Magic Plastics heater-union connections
- Applications identified by manufacturer part 0121108020
- Connections cross-referenced by distributor number 89-238-1040
- Documented Delta UV E/ES Series equipment applications where this exact part is specified
Why Correct Thread Style Matters
Pool and spa union nuts can look similar while using different thread forms, diameters, and flange designs. This part uses a 2-inch female buttress thread. Do not select it only by nominal pipe size or appearance. Match the existing union connection, thread style, and manufacturer part number before ordering.
Product Specifications
| Brand | Magic Plastics |
|---|---|
| Product Type | Heater Union Split Nut Set |
| Manufacturer Part Number | 0121108020 |
| UPC / GTIN | 806105081858 |
| Distributor Reference | 89-238-1040 |
| Nominal Size | 2 in. |
| Thread Type | Female Buttress Thread (FBT) |
| Includes | Split nut set with screws |
| Application | Compatible heater-union connections |
| Documented Equipment Reference | Delta UV E/ES Series parts listings |
Compatibility & Fitment Notes
Magic Plastics identifies 0121108020 as its 2-inch FBT heater split nut set with screws. Secondary equipment-parts references also list this item in Delta UV E/ES Series UV sanitizer/clarifier systems. Because buttress-thread unions are not universal, verify the existing union body or equipment parts diagram before ordering.
Installation & Service Notes
Shut down the circulation system and relieve pressure before servicing any pool or spa plumbing connection. Confirm that the mating union components are undamaged and that the sealing washer or gasket specified for the complete union is present and serviceable. Tighten the split-nut hardware evenly and follow the equipment manufacturer’s service procedure. Do not force mismatched threads.
Buy with Confidence
Benchmark Pool Supply helps customers match plumbing repair parts by manufacturer part number, thread style, nominal size, and equipment application. Before ordering 0121108020, verify that your connection requires the Magic Plastics 2-inch female buttress-thread heater split nut set.
Frequently Asked Questions
What is Magic Plastics 0121108020?
It is a genuine Magic Plastics 2-inch female buttress-thread heater split nut set supplied with screws.
Is 89-238-1040 the Magic Plastics part number?
No. 89-238-1040 is a distributor/reference number. The Magic Plastics manufacturer part number is 0121108020.
Does this include the complete heater union?
No. This listing is for the split nut set with screws. Verify any required tailpiece, washer, gasket, or other union components separately.
Will this fit every 2-inch pool heater union?
No. It uses a 2-inch female buttress thread, so the mating union geometry must match. Verify the existing part number or equipment parts diagram before ordering.
What should I check before installing the split nut?
Confirm the mating threads are correct and undamaged, relieve system pressure, inspect the union sealing components, and tighten the split-nut screws evenly according to the equipment service procedure.
