Hot Tub Pump Unions

Pump unions are typically made of PVC and make it easier to remove the pump when servicing the hot tub. They connect the pump suction and discharge to the spa's plumbing and heater.

The union fittings make for quicker & easier connection and disconnection of components. They comprise a male threaded part and a female threaded part sealed together (hand tight) with an o-ring.

See also:
Impellers
Wet Ends
Shaft Seals

Need help? Ask us a question

Pump unions are typically made of PVC and make it easier to remove the pump when servicing the hot tub. They connect the pump suction and discharge to the spa's plumbing and heater.

The union fittings make for quicker & easier connection and disconnection of components. They comprise a male threaded part and a female threaded part sealed together (hand tight) with an o-ring.

See also:
Impellers
Wet Ends
Shaft Seals

Need help? Ask us a question

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  • HydroAir Pump Union Kit 2.00"
  • Genuine HydroAir unions
  • O-Rings included
  • 50mm & 2.0" Sockets
In stock 5 in stock
In stock Same day dispatch on orders before 14:30
£19.99
 
  • HydroAir Pump Union Kit 2.00"
  • Buttress Threads
  • Genuine HydroAir unions
  • O-Rings included
  • 2.0" & 63mm sockets
In stock 5 in stock
In stock Same day dispatch on orders before 14:30
£19.99
 
  • Espa Pump Union
  • Suitable for Espa pumps
  • 2.50" BSP Thread
  • 1.00" Tee
In stock 9 in stock
In stock Same day dispatch on orders before 14:30
£21.49
Saving: £4.91
  • Espa Pump Union Set
  • Suitable for Espa pumps
  • 2.50" BSP Threaded
  • 1.50" Socket Connection
In stock 17 in stock
In stock Same day dispatch on orders before 14:30
£15.49
Saving: £3.52
  • Espa Pump Union
  • Suitable for Espa Pumps
  • 2.5" BSP Threads
  • 32mm Socket Tee
In stock 4 in stock
In stock Same day dispatch on orders before 14:30
£21.60
Saving: £2.40
  • Espa Pump Union
  • Suitable for Espa pumps
  • 2.5" BSP Threads
  • Metric 50mm Socket Connection
In stock 12 in stock
In stock Same day dispatch on orders before 14:30
£16.49
Saving: £3.82
  • Gecko Pump Union Pair
  • Suitable for AquaFlo Pumps
  • 1.50" Buttress Threaded
  • 1.50" Socket Connection
In stock 1 in stock
In stock Same day dispatch on orders before 14:30
£16.20
 
  • Gecko Pump Union Pair
  • Suitable for AquaFlo Pumps
  • 2.00" Buttress Threaded
  • 2.00" Socket Connection
  • In stock 7 in stock
    In stock Same day dispatch on orders before 14:30
    £13.82
    Saving: £2.98
  • 50mm Socket
  • Use with 50mm pipe work
  • Includes O-ring
  • Out of stock Out of Stock
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    £5.49
     
  • HydroAir Pump Union
  • Fits 1.5" Buttress threads (63mmØ)
  • 1.5" Socket
  • Use with 1.5" pipe work
  • Includes O-ring
  • In stock 1 in stock
    In stock Same day dispatch on orders before 14:30
    £3.47
    Saving: £0.38
    • HydroAir Pump Union
    • Fits 1.5" Buttress threads (63mmØ)
    • 50mm Socket
    • Use with 50mm pipe work
    • Includes O-ring
    In stock 29 in stock
    In stock Same day dispatch on orders before 14:30
    £6.64
    Saving: £0.74
    • HydroAir Pump Union
    • 1.5" Buttress Threads
    • 90° Elbow
    • 50mm Socket
    In stock 16 in stock
    In stock Same day dispatch on orders before 14:30
    £6.35
    Saving: £0.70
    Fits 2.0" Buttress threads (79mmØ)
  • 2.0" Socket
  • Use with 2.0" pipe work
  • Includes O-ring
  • In stock 11 in stock
    In stock Same day dispatch on orders before 14:30
    £6.80
    Saving: £2.26
  • HydroAir Pump Union
  • Fits 1.5" BSP threads (63mmØ)
  • 1.5" Socket
  • Use with 1.5" pipe work
  • In stock 6 in stock
    In stock Same day dispatch on orders before 14:30
    £5.42
    Saving: £1.35
    • HydroAir Pump Union Extender
    • 1.5" Inch Socket
    • Buttress Connections
    • Adds approx 10mm length
    In stock 7 in stock
    In stock Same day dispatch on orders before 14:30
    £3.99
    Saving: £1.80
    • Koller Pump Union
    • 1.5" Buttress Threaded
    • 50mm I/D Socket
    • with Shared Screw
    • Suitable for pumps & blowers
    In stock 5 in stock
    In stock Same day dispatch on orders before 14:30
    £4.99
     
    • Koller Pump Union
    • 1.50" Buttress Threads
    • 32mm Socket
    • Suitable for Pumps & Blowers 
    In stock 1 in stock
    In stock Same day dispatch on orders before 14:30
    £4.49
     
    • Koller Pump Union 90
    • with Split Nut
    • 50mm I/D
    • 2.0" O/D
    • 62 x 3mm Thread
    In stock 9 in stock
    In stock Same day dispatch on orders before 14:30
    £8.49
     
    • Koller Pump Union Tee
    • 1.5" Buttress
    • 25mm Sockets
    • White
    In stock 17 in stock
    In stock Same day dispatch on orders before 14:30
    £7.49
     
  • Koller Pump Union Tee
  • 1.5" Buttress
  • with Split Nut
  • 25mm Sockets
  • In stock 13 in stock
    In stock Same day dispatch on orders before 14:30
    £8.99
    Saving: £1.00
    • O Ring
    • 70mm O/D
    • 4.5mm Thickness
    • Suitable for LX Pumps
    • LP/WP Unions
    In stock 6 in stock
    In stock Same day dispatch on orders before 14:30
    £0.99
    Saving: £0.11
    • LX Pump Union
    • 1.50" Buttress Threads
    • 1.50" Socket Connection
    • Suitable for the LX range of pumps  
    In stock 4 in stock
    In stock Same day dispatch on orders before 14:30
    £6.99
     
    • LX Pump Union
    • 2.00" Socket
    • Buttress Threaded
    • Suitable for LX Pumps
    In stock 4 in stock
    In stock Same day dispatch on orders before 14:30
    £6.99
     
    • O-Ring for Pump Unions
    • 49.21 x 3.53mm
    Out of stock Out of Stock
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    £0.99
     
    • Hydrospares Pump Union Collar
    • Split Nut Type
    • 2.00" - 79mm
    In stock 6 in stock
    In stock Same day dispatch on orders before 14:30
    £27.49
    Saving: £2.60
    • Espa Wiper3 Pump Union
    • 2.00" Socket
    • BSP Thread
    • Suitable for Espa Pumps
    In stock 8 in stock
    In stock Same day dispatch on orders before 14:30
    £16.99
    Saving: £2.81
    • Pump Union Heat Stick
    • Generates Heat via Friction.
    • Connection type: Glued Female Socket.
    • Connection Size: 1.5" (48mm)
    In stock 1 in stock
    In stock Same day dispatch on orders before 14:30
    £19.99
    Saving: £5.01
    • Waterway Pump Union
    • Suitable for Waterway Pumps
    • 1.5" Buttress Threads & MPT Adaptor
    • 1.5" Socket Connection
    In stock 9 in stock
    In stock Same day dispatch on orders before 14:30
    £9.49
    Saving: £3.53
    Fits 79mm (2") buttress thread
  • 2" spigot fitting - 45°
  • Use with 2" pipe & fittings
  • Includes O-ring
  • PVC
  • In stock 3 in stock
    In stock Same day dispatch on orders before 14:30
    £6.99
    Saving: £2.63
  • 2" slip fitting
  • Use with 2" pipe & fittings
  • Includes Oring
  • PVC
  • Available for Pre Order Special Order Item
    Alert Lead time confirmed upon order
    £6.49
    Saving: £2.19
  • 1.5" slip fitting
  • Use with 1.5" pipe & fittings
  • Includes O-ring
  • PVC
  • Out of stock Out of Stock
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    £6.49
    Saving: £2.19
    • Waterway Pump Union
    • 2.00" Socket
    • Buttress Threaded
    • 90° Swept Elbow
    In stock 15 in stock
    In stock Same day dispatch on orders before 14:30
    £7.99
    Saving: £3.29
    Fits 93mm (2.5") buttress thread
  • 2" slip fitting
  • Use with 2" pipe & fittings
  • Includes O-ring
  • PVC
  • In stock 15 in stock
    In stock Same day dispatch on orders before 14:30
    £8.99
    Saving: £3.26
  • Pump Union Adaptor
  • 1.5" Buttress Thread
  • 2.0" Spigot Tailpiece
  • In stock 8 in stock
    In stock Same day dispatch on orders before 14:30
    £2.99
    Saving: £0.72
    • Waterway Wet End Adapter
    • Suitable for Waterway Pumps
    • 2.00" x 2.50"
    • Buttress Thread
    • Includes suitable O-Rings
    In stock 1 in stock
    In stock Same day dispatch on orders before 14:30
    £6.49
    Saving: £1.38