Skip to content

Your cart is empty

Continue shopping

Have an account?

Log in to checkout faster.

Shopping cart (0)

Loading...

You might like

  • Aquasystem 5-24 Litre Expansion Vessel Mounting Bracket

    Regular price £7.99
    Sale price £7.99 Regular price
    Unit price /  per 
    Sale Sold out
  • Caleffi 312 Series 3 Bar Pressure Relief Valve 312430

    Regular price £6.50
    Sale price £6.50 Regular price
    Unit price /  per 
    Sale Sold out
  • Reliance 1M 3/4" Expansion Vessel Hose HOSE202106

    Regular price £9.99
    Sale price £9.99 Regular price
    Unit price /  per 
    Sale Sold out
  • Black plastic 15mm x 22mm tundish on white background

    Reliance 15mm x 22mm Plastic Tundish TUND219005

    Regular price £7.99
    Sale price £7.99 Regular price
    Unit price /  per 
    Sale Sold out
Order special instructions
Subtotal (0)

£0.00

View Cart
  • Heating
    • Boilers
      • Electric Boilers
      • Boiler Accessories
    • Cylinders
      • Vented
      • Unvented
      • Cylinder Accessories
    • Fires & Stoves
      • Electric Fires
      • Gas Fires
      • Stoves
    • Heating Controls
      • Immersion Heaters
      • Programmers & Timers
      • Thermostats
      • Radiator Valves
      • Motorised Valves
    • Pumps
      • Central Heating Pumps
      • Pump Accessories
      • Shower Pumps
    • Water Heating
      • Instantaneous
      • Unvented
      • Vented
      • Water Boilers
      • Water Heater Accessories
      • Water Heater Kits
      • Water Heater Taps
    • Underfloor Heating
  • Plumbing
    • Bathroom & Shower
      • Bathroom Taps
      • Showers
      • Towel Rails
      • Bathroom Wastes
      • Thermostatic Mixers
    • Brassware & Valves
      • Air Vents
      • Float Valves & Floats
      • Washing Machine Taps
      • Drain Off Cocks
      • Isolating Valves
      • Bib Taps
      • Bypass Valves
      • Ball Valves
      • Pressure Reducing Valves
      • Stop Cocks
      • Thermostatic Mixing Valves
      • Cooker Fittings
    • Expansion Vessels
      • Potable Expansion Vessels
      • Heating Expansion Vessels
      • Expansion Vessel Accessories
    • Hoses
      • Cooker Hoses
      • Tap Connector Hose
      • Shower Hoses
      • Washing Machine Hoses
    • Kitchen
      • Kitchen Taps
      • Kitchen Sinks
      • Kitchen Wastes
    • Plumbing Accessories
      • Floats
      • Gauges
      • Tundishes
    • Water Treatment
      • Filters
      • System Cleaners
      • Scale Inhibitors
  • Electrical
    • Cable Management
      • 3 Core
      • 5 Core
      • PVC Tapes
      • Twin & Earth
    • Electrical Fittings
      • Connector Strips
      • Plugs
      • Fuses
      • Earth Clamps
    • Heaters & Fans
      • Electric Radiators
      • Electric Fan Convectors
    • Sockets & Switches
      • Sockets
      • Switches
      • Junction Boxes
      • Pattress Boxes
      • Switched Spurs
      • Blanking Plates
    • Ventilation
      • Vent Hoses & Accessories
      • Grilles
      • Extractor Fans
  • Renewables
    • Heat Pumps
      • Air Source Heat Pumps
    • Heat Pump Cylinders
    • Buffer Tanks
    • Heating Controls
      • Smart Thermostats
      • Smart TRVs
    • Solar
      • Solar Expansion Vessels
      • Solar Pressure Relief Valves
      • Solar Thermostatic Mixing Valves
    • Underfloor Heating
  • Spares
    • Air Vents
    • Expansion Vessels
    • Gaskets
    • Heat Exchangers
    • Immersion Heaters & Thermostats
      • Immersion Heaters
      • Immersion Heater Thermostats
    • Multiblocs
    • Pressure Reducing Valves & Cartridges
      • Pressure Reducing Valves
      • Pressure Reducing Valve Cartridges
    • Pressure & Temperature Relief Valves
    • Sensors
    • Thermostats
    • Tundishes
    • Valve Motors
  • Tools
    • Consumables
      • Solder
      • Pipe Sealant
      • Flux
      • Wipes
      • Fire Cement
      • Wire Wool
      • Plumbers Mait
    • Drainage
    • Hand Tools
    • Plumbing Tools
    • Workwear & Safety
  • Commercial
    • Commercial Unvented
    • Commercial Immersion Heaters
    • Commercial Water Heating Accessories
    Arcanu Arcanu Arcanu
    Collections
    See All Categories
    • Electric Boilers

      13 items

    • Vented

      4 items

    • Buffer Tanks

      3 items

    • Workwear & Safety

      4 items

    • Unvented

      102 items

    • Air Vents

      6 items

    • PVC Tapes

      4 items

    • Commercial Unvented

      3 items

    • sign in
    • Create account
    0 Cart£0.00
    • Heating
      Boilers
      • Electric Boilers
      • Boiler Accessories
      Cylinders
      • Vented
      • Unvented
      • Cylinder Accessories
      Fires & Stoves
      • Electric Fires
      • Gas Fires
      • Stoves
      Heating Controls
      • Immersion Heaters
      • Programmers & Timers
      • Thermostats
      • Radiator Valves
      • Motorised Valves
      Pumps
      • Central Heating Pumps
      • Pump Accessories
      • Shower Pumps
      Water Heating
      • Instantaneous
      • Unvented
      • Vented
      • Water Boilers
      • Water Heater Accessories
      • Water Heater Kits
      • Water Heater Taps
      Underfloor Heating
      • Plumbing
        Bathroom & Shower
        • Bathroom Taps
        • Showers
        • Towel Rails
        • Bathroom Wastes
        • Thermostatic Mixers
        Brassware & Valves
        • Air Vents
        • Float Valves & Floats
        • Washing Machine Taps
        • Drain Off Cocks
        • Isolating Valves
        • Bib Taps
        • Bypass Valves
        • Ball Valves
        • Pressure Reducing Valves
        • Stop Cocks
        • Thermostatic Mixing Valves
        • Cooker Fittings
        Expansion Vessels
        • Potable Expansion Vessels
        • Heating Expansion Vessels
        • Expansion Vessel Accessories
        Hoses
        • Cooker Hoses
        • Tap Connector Hose
        • Shower Hoses
        • Washing Machine Hoses
        Kitchen
        • Kitchen Taps
        • Kitchen Sinks
        • Kitchen Wastes
        Plumbing Accessories
        • Floats
        • Gauges
        • Tundishes
        Water Treatment
        • Filters
        • System Cleaners
        • Scale Inhibitors
      • Electrical
        Cable Management
        • 3 Core
        • 5 Core
        • PVC Tapes
        • Twin & Earth
        Electrical Fittings
        • Connector Strips
        • Plugs
        • Fuses
        • Earth Clamps
        Heaters & Fans
        • Electric Radiators
        • Electric Fan Convectors
        Sockets & Switches
        • Sockets
        • Switches
        • Junction Boxes
        • Pattress Boxes
        • Switched Spurs
        • Blanking Plates
        Ventilation
        • Vent Hoses & Accessories
        • Grilles
        • Extractor Fans
      • Renewables
        Heat Pumps
        • Air Source Heat Pumps
        Heat Pump Cylinders
          Buffer Tanks
            Heating Controls
            • Smart Thermostats
            • Smart TRVs
            Solar
            • Solar Expansion Vessels
            • Solar Pressure Relief Valves
            • Solar Thermostatic Mixing Valves
            Underfloor Heating
            • Spares
              Air Vents
                Expansion Vessels
                  Gaskets
                    Heat Exchangers
                      Immersion Heaters & Thermostats
                      • Immersion Heaters
                      • Immersion Heater Thermostats
                      Multiblocs
                        Pressure Reducing Valves & Cartridges
                        • Pressure Reducing Valves
                        • Pressure Reducing Valve Cartridges
                        Pressure & Temperature Relief Valves
                          Sensors
                            Thermostats
                              Tundishes
                                Valve Motors
                                • Tools
                                  Consumables
                                  • Solder
                                  • Pipe Sealant
                                  • Flux
                                  • Wipes
                                  • Fire Cement
                                  • Wire Wool
                                  • Plumbers Mait
                                  Drainage
                                    Hand Tools
                                      Plumbing Tools
                                        Workwear & Safety
                                        • Commercial
                                          Commercial Unvented
                                            Commercial Immersion Heaters
                                              Commercial Water Heating Accessories
                                              FREE SHIPPING TO UK MAINLAND
                                              SAME WORKING DAY DISPATCH ON STOCKED ORDERS BEFORE 4PM
                                              MULTI-BUY DISCOUNTS AVAILABLE | ENQUIRE HERE
                                              Home Collections

                                              Collections

                                              • 18 items

                                                Immersion Heaters

                                              • Immersion Heaters & Thermostats (Spares)

                                                0 items

                                              • 26 items

                                                Immersion Heaters (Heating)

                                              • 17 items

                                                Immersion Heaters (Spares)

                                              • 11 items

                                                Immersion Thermostats

                                              • 4 items

                                                Instantaneous

                                              • 2 items

                                                Isolating Valves

                                              • 1 items

                                                Junction Boxes

                                              • Kitchen

                                                0 items

                                              • 3 items

                                                Kitchen Sinks

                                              • 5 items

                                                Kitchen Taps

                                              • 3 items

                                                Kitchen Wastes

                                              • 3 items

                                                Kits (Commercial)

                                              • 3 items

                                                Motorised Valves

                                              • 29 items

                                                Multiblocs

                                              • 27 items

                                                Multiblocs (Spares)

                                              • 4 items

                                                Pattress Boxes

                                              • 1 items

                                                Pipe Sealant

                                              • 2 items

                                                Plugs

                                              • 1 items

                                                Plumbers Mait

                                              • 7 items

                                                Plumbing Tools

                                              • 59 items

                                                Potable & Heating Expansion Vessels

                                              • 57 items

                                                Potable Expansion Vessels

                                              • 10 items

                                                Pressure & Temperature Relief Valves

                                              • 10 items

                                                Pressure & Temperature Relief Valves (Spares)

                                              • 8 items

                                                Pressure Reducing Cartridges

                                              • 7 items

                                                Pressure Reducing Valve Cartridges (Spares)

                                              • 7 items

                                                Pressure Reducing Valves

                                              • Pressure Reducing Valves & Cartridges (Spares)

                                                0 items

                                              • 4 items

                                                Pressure Reducing Valves (Brassware)

                                              • 1
                                              • 2
                                              • 3
                                              • 4
                                              • 5
                                              • Free Shipping

                                                To All UK Mainland Addresses

                                              • Same Working Day Dispatch

                                                On Orders Placed Before 16:00

                                              • Customer Service Available

                                                From 09:00 - 17:00 Every Working Day

                                              • Multi-Buy Discounts Available

                                                Contact support@arcanu.com for information

                                              • Home
                                              • Returns & Refunds
                                              • Privacy Policy
                                              • Terms & Conditions
                                              • About Us
                                              • Contact Us
                                              • Multi-Buy Enquiry

                                              Opening Hours: 09:00-17:00, Monday to Friday (Excluding Bank Holidays)

                                              Company Registration Number: 14314488

                                              VAT Number: 425430521

                                              • support@arcanu.com

                                              Subscribe to our emails for exclusive offers and discounts.

                                              2025, Arcanu Powered by Shopify
                                              • Choosing a selection results in a full page refresh.
                                              • Opens in a new window.
                                              Free Shipping To All UK Mainland Addresses
                                              Multi-Buy Discount Email us at support@arcanu.com