Hot Tub & Spa - 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.   

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.   

Need help? Ask us a question

Active Filters

Sort by
Spares Available
Spares Available
  • Balboa Pump Union
  • Fits 63mm (1.5") buttress thread
  • Tailpiece Tee (Socket) - 32mm
  • Use with 32mm pipe & fittings
  • Includes O-ring
In stock 67 in stock
In stock Same day dispatch on orders before 15:00
£9.50
Saving: £0.70
Collar = 1.5 " (Known As)
Buttress Thread
Tailepiece Tee = 32mm (Socket)
O-Ring Included
  • Balboa Pump Union
  • Fits 1.5" Buttress threads (63mmŲ)
  • 1.5" Socket
  • Use with 1.5" pipework & connections
  • Includes O-ring
In stock 33 in stock
In stock Same day dispatch on orders before 15:00
£2.91
 
Collar = 1.5 " (Known As)
Buttress Thread
Tailpiece = 1.5" (Known As)
O-Ring Included
  • Balboa Pump Union
  • Fits 1.5" Buttress threads (63mmŲ)
  • 50mm Socket
  • Use with 50mm pipework & connections
  • Includes O-ring
In stock 44 in stock
In stock Same day dispatch on orders before 15:00
£3.33
Saving: £0.12
Collar = 1.5 " (Known As)
Buttress Thread
Tailpiece = 50 mm
O-Ring Included
  • Balboa Pump Union
  • Fits 1.5" BSP threads (63mmŲ)
  • 1.5" Socket
  • Use with 1.5" pipework & connections
  • O-ring Not Included
In stock 31 in stock
In stock Same day dispatch on orders before 15:00
£5.41
 
Collar = 1.5 " (Known As)
BSP Thread
Tailpiece = 1.5" (Known As)
O-Ring Not Included
  • Balboa Pump Union
  • Fits 1.5" Buttress Threads (63mmŲ)
  • 90° Elbow
  • 50mm Socket
  • Use with 50mm pipework & connections
  • Includes O-ring
In stock 13 in stock
In stock Same day dispatch on orders before 15:00
£5.29
Saving: £0.58
Collar = 1.5 " (Known As)
Buttress Thread
Tailpiece = 90° Elbow 50 mm
O-Ring Included
  • Espa Pump Union
  • Fits 1.5" BSP threads (63mmŲ)
  • 50mm Socket
  • Use with 50mm pipework & connections
  • O-ring Not Included
In stock 6 in stock
In stock Same day dispatch on orders before 15:00
£13.74
Saving: £3.18
Collar = 1.5 " (Known As)
BSP Thread
Tailpiece = 50mm
O-Ring Not Included
  • Espa Pump Union
  • Fits 1.5" BSP threads (63mmŲ)
  • Tee - 32mm Sockets
  • Use with 32mm pipework & connections 
  • Suitable for Espa Pumps
In stock 5 in stock
In stock Same day dispatch on orders before 15:00
£13.33
Saving: £6.68
Collar = 1.5 " (Known As)
BSP Thread
Tailepiece Tee = 32mm (Socket)
O-Ring Not Included
  • Espa Pump Union
  • Fits 1.5" BSP threads (63mmŲ)
  • 1.5" Socket
  • Use with 1.5" pipework & connections
  • O-ring Not Included
In stock 4 in stock
In stock Same day dispatch on orders before 15:00
£12.91
Saving: £2.93
Collar = 1.5 " (Known As)
BSP Thread
Tailpiece = 1.5" (Known As)
O-Ring Not Included
  • Espa Pump Union
  • Fits 1.5" BSP threads (63mmŲ)
  • Tee - 1.0" Sockets
  • Use with 1.0" pipework & connections 
  • Suitable for Espa Pumps
In stock 5 in stock
In stock Same day dispatch on orders before 15:00
£17.91
Saving: £4.09
Collar = 1.5 " (Known As)
BSP Thread
Tailepiece Tee = 1 Inch (Socket)
O-Ring Not Included
  • Espa Union Kit
  • Suitable for Tiper Models
  • 1.5" Buttress Connections
  • 1.5 Inch Tailpiece (Socket) x 1 Inch Tailpiece Tee
  • Use with 1.5"/1" pipework & connections
  • O-ring Included
In stock 36 in stock
In stock Same day dispatch on orders before 15:00
In stock 13.0000 more on order
£14.11
Saving: £0.74
Collar = 1.5 " (Known As)
Buttress Thread
Tailpiece = 1.5", Tee = 1"
O-Ring Included
  • Espa Union Kit
  • Suitable for Tiper Models
  • 1.5" Buttress Connections
  • 50mm Socket x 32mm Tee
  • Use with 50mm/32 mm pipework & connections
  • O-ring Included
In stock 7 in stock
In stock Same day dispatch on orders before 15:00
£28.74
Saving: £0.42
Collar = 1.5 " (Known As)
Buttress Thread
Tailpiece = 50mm, Tee = 32mm
O-Ring Included
  • Gecko Pump Union
  • Fits 1.5" Buttress threads (63mmŲ)
  • 1.5" Socket
  • Use with 1.5" pipework & connections
  • Includes O-ring
Currently Out of Stock Currently Out of Stock
Available for Pre Order Available for Pre Order
£7.49
Saving: £0.40
Balboa Pump Union
Buttress Thread
Tailpiece = 1.5" (Known As)
O-Ring Included
  • Koller Pump Union
  • Suitable for Pumps & Blowers
  • Fits 1.5" Buttress threads (63mmŲ)
  • 32mm Tailpiece (Socket)
  • Use with 32mm pipework & connections
  • Includes O-ring
Available for Pre Order Special Order Item
Alert Please contact us for a lead time
£5.41
Saving: £0.45
Fits Pumps & Blowers
Collar = 1.5 " (Known As)
Buttress Thread
Tailpiece = 32mm
  • Koller Pump Union
  • Suitable for Pumps & Blowers
  • Fits 1.5" Buttress threads (63mmŲ)
  • 50mm Tailpiece (Socket)
  • with Shared Screw
  • Suitable for pumps & blowers
Available for Pre Order Special Order Item
Alert Please contact us for a lead time
£7.91
Saving: £0.81
Fits Pumps, Blowers & UV System
Collar = 1.5 " (Known As)
Buttress Thread
Tailpiece = 50mm
  • Koller Pump Union
  • Fits 1.5" Buttress threads (63mmŲ)
  • 20mm Tailpiece Tee (Socket)
  • Use with 20mm pipework & connections
  • Includes O-ring
In stock 12 in stock
In stock Same day dispatch on orders before 15:00
£6.24
 
Collar = 1.5 " (Known As)
Buttress Thread
Tailpiece Tee = 25mm
O-Ring Included
  • Koller Pump Union
  • Fits 1.5" Buttress threads (63mmŲ)
  • 32mm Tailpiece Tee (Socket)
  • Use with 32mm pipework & connections
  • Includes O-ring
Currently Out of Stock Currently Out of Stock
Available for Pre Order Available for Pre Order
£7.49
Saving: £0.83
Collar = 1.5 " (Known As)
Buttress Thread
Tailpiece Tee = 32mm
O-Ring Included
  • Koller Pump Union with split nut
  • Fits 1.5" Buttress Threads (63mmŲ)
  • 90° Elbow
  • 50mm Socket Tailpiece Connection (or 2" Spigot)
  • Use with 50mm/2" pipework & connections
  • Includes O-ring
Currently Out of Stock Currently Out of Stock
Available for Pre Order Available for Pre Order
£7.08
 
Collar = 1.5 " (Known As)
Buttress Thread
Tailpiece = 90° Elbow 50 mm
O-Ring Included
  • LX Pump Union
  • Fits 1.5" Buttress threads (63mmŲ)
  • 1.5" Socket Connection
  • Use with 1.5" pipework & connections
  • Includes O-ring
  • Suitable for the LX range of pumps  
Currently Out of Stock Currently Out of Stock
Available for Pre Order Available for Pre Order
Available for Pre Order 31 more on order
£5.41
Saving: £1.19
Collar = 1.5 " (Known As)
Buttress Thread
Tailpiece = 1.5" (Known As)
O-Ring Included
  • Rocoi Union Kit - Metric
  • Fits 1.50" Euro Buttress 
  • 50mm Tailpiece (Socket)
  • 32mm Tailpiece Tee
In stock 7 in stock
In stock Same day dispatch on orders before 15:00
£28.74
Saving: £0.42
Rocoi Pump Union Kit
Euro Butress Thread
32mm Tailpiece Tee
50mm Tailpiece (Socket)
  • Rocoi Pump Union Set
  • Fits 1.5" (63mmŲ) Euro Buttress
  • 1.5" (48mmŲ) Female socket
  • 1.0" (33.3mmŲ) Female Tee
In stock 36 in stock
In stock Same day dispatch on orders before 15:00
In stock 13.0000 more on order
£14.11
Saving: £0.74
Rocoi Pump Union Kit
Euro Butress Thread
1 Inch Tailpiece Tee
1.5 Inch Tailpiece (Socket)
  • Rocoi Pump Union
  • Suitable for Rocoi pumps
  • Fits 1.5" Buttress threads (63mmŲ)
  • 1.5" Socket Connection
  • Use with 1.5" pipework & connections
  • Includes O-ring
Currently Out of Stock Currently Out of Stock
Available for Pre Order Available for Pre Order
Available for Pre Order 31 more on order
£5.41
Saving: £1.19
Collar = 1.5 " (Known As)
Buttress Thread
Tailpiece = 1.5" (Known As)
O-Ring Included
  • Rocoi Pump Union Set
  • Fits 1.5" (63mmŲ) Euro Buttress
  • 1.0" discharge tee
  • 1.0" Barb fittings
  • 45° elbow
  • Pipe clip
In stock 19 in stock
In stock Same day dispatch on orders before 15:00
£31.13
Saving: £1.64
Rocoi Pump Union Kit
Euro Butress Thread
Tee With 45° Elbow
1" Barbs
  • Rocoi Pump Unions
  • Fits 1.5" (63mmŲ) Euro Buttress
  • 1.0" Discharge Tee
  • 1.0" Barb Fittings
  • Pipe clips
In stock 19 in stock
In stock Same day dispatch on orders before 15:00
£25.16
 
Rocoi Pump Union Kit
Euro Butress Thread
Collar = 1.5" (Known As)
1" Barbs
  • SuperFlow Pump Union
  • Suitable for 1.3HP Model
  • Fits 1.5" Buttress threads (63mmŲ)
  • 1.5" Tailpiece (Socket)
  • Use with 1.5" pipework & connections
  • Includes O-ring
Currently Out of Stock Currently Out of Stock
Available for Pre Order Available for Pre Order
£12.49
 
Collar = 1.5 " (Known As)
Buttress Thread
Tailpiece = 1.5" (Known As)
O-Ring Included
  • SuperFlow Pump Union
  • Suitable for 1HP Model
  • Fits 1.5" Buttress threads (63mmŲ)
  • 1.5" Socket
  • Use with 1.5" pipework & connections
  • Includes O-ring
Available for Pre Order Special Order Item
Alert Please contact us for a lead time
£12.41
 
Collar = 1.5 " (Known As)
Buttress Thread
Tailpiece = 1.5" (Known As)
O-Ring Included
  • Waterway Pump Union
  • Fits 1.0" Buttress threads (50mmŲ)
  • 1.0 Inch Tailpiece (Socket)
  • Use with 1.0" pipework & connections
  • Includes O-ring
In stock 8 in stock
In stock Same day dispatch on orders before 15:00
£2.91
Saving: £0.68
Collar = 1.0" (Known As)
Buttress Thread
Tailpiece = 1.0" (Known As)
O-Ring Included
  • Waterway Pump Union
  • Fits 1.5" Buttress threads (63mmŲ)
  • 1.5" Socket Connection
  • Use with 1.5" pipe work
  • Includes O-ring
Currently Out of Stock Currently Out of Stock
Available for Pre Order Available for Pre Order
Available for Pre Order 30 more on order
£3.33
Saving: £1.00
Collar = 1.5 " (Known As)
Buttress Thread
Tailpiece = 1.5" (Known As)
O-Ring Included
  • HydroAir Pump Union Tee
  • Suitable for HydroAir Pumps
  • 1 ½" Socket Connection
  • 1" Tee Socket Connection
In stock 50 in stock
In stock Same day dispatch on orders before 15:00
£5.41
 
1" x 1 1/2"
PVCu
Chemical Resistant
230PSI / 16 Bar
  • HydroAir Pump Union Discharge Tee
  • Suitable for HydroAir Pumps
  • Tee: 32mm x 32mm Socket
  • Union: 50mm Socket
In stock 49 in stock
In stock Same day dispatch on orders before 15:00
£5.41
 
32mm x 32mm x 50mm
PVCu
Chemical Resistant
230PSI / 16 Bar
  • AP45 Pump Union
  • Lower Suction Port
  • Suitable for AP45 Pump
Currently Out of Stock Currently Out of Stock
Available for Pre Order Available for Pre Order
£7.91
 
Fits only AP45
Available while stocks last
Lower 1.25" Suction
For 1.1/4 Inch Pipe
  • Pump Union suitable for AP45 pumps
  • Includes: Washer, Clamp & Socket
  • 1.0" Inch Connection
Currently Out of Stock Currently Out of Stock
Available for Pre Order Available for Pre Order
£7.91
 
Fits only AP45
Available while stocks last
Upper 1.00"
For 1.0 Inch Manifolds / Pipe