Canadian Spa UK
Plumbing 2in Heater Split Nut (Union)
Plumbing 2in Heater Split Nut (Union)
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PLUMBING 2IN HEATER
SPLIT NUT (UNION)
Pump Union Collar - Split Nut Type 2" - 79mm

When a pump union collar fractures or splits, replacement becomes problematic due to adhesive bonding to the pipe.
This Split Nut Collar addresses that challenge directly, offering a practical solution for hot tub technicians and service professionals. Engineered with a Buttress collar design identical to heater union specifications, it enables collar replacement on 2" pump unions whilst preserving the original glued section intact.
The oversized construction accommodates various union sleeve diameters, allowing installation over existing components without requiring complete disassembly. Once positioned, the included fastening screw secures the collar, which then threads onto the pump assembly with the same mechanical action as factory-original components.
This approach eliminates costly replacement procedures and reduces labour time significantly.
Pipe Sizes
An indispensable component for any professional repair toolkit, it delivers reliable performance and cost-effective maintenance solutions for hot tub systems requiring union collar restoration.

Buying and support guide
We supply the Plumbing 2in Heater Split Nut (Union) with clear specs and UK support. Before you order, check it suits your spa model, size, connector type, power supply and access. This helps you avoid delays and returns.
Replacing a part? Match it to your spa's model and year where you can. For pumps, control packs, heaters, jets, covers, filters, topsides and plumbing, check the part number and connection type. Compare delivery time, warranty and support as well as price.
Running costs matter as much as the price you pay. Energy use, insulation, cover condition, filters and water care all affect long-term value. Replacing worn parts early and keeping the water moving and filtered can save on repairs.
Looking for a whole new tub rather than a part? Compare hot tubs, swim spas and saunas by seating, hydrotherapy, who will use it and the space you have.
Helpful links
- Hot tub parts and replacements
- Filters and water care
- Spa chemicals
- Spa accessories
- Replacement hot tub covers
- Hot tubs for sale
- Swim spas
- Home saunas
- Hot tub servicing and repairs
Quick questions
How do I check this part fits my spa?
Check the model name, model year, part number and connector style. If you're not sure, contact our support team before you buy.
Can you help with fitting?
Yes. For many products we can guide you through replacement and servicing, and tell you when a qualified technician is the better option.
Will this improve performance?
The right replacement part can improve reliability, water flow, heating and everyday performance.