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Unvented Cylinders (48 products)

Our range of unvented hot water cylinders are stainless steel shell with stainless steel thermostat pockets, all units pickled and passivated to ensure long life, insulated with environmentally friendly foam and enclosed in a rust resistant white steel case. They are available as direct (electrically heated) and indirect for oil and gas. Read more Show less

  • 1 of 2

Dry Trap Tundish - 15mm x 32mm Compression

Part number: 23731

The TeslaTun is both a dry trap and a tundish combined, incorporating a sea...

  • New Product

    Just arrived. Latest version, etc.

Ex. VAT

£18.95

Save £3.55 (15%)

Inc. VAT

£22.74

Save £4.26 (15%)

Expansion Vessel for Unvented Hot Water - 18 Litres

Part number: 21195

Potable Water expansion vessel - 18 litres with butyl bladder membrane manu...

Ex. VAT

£30.16

Inc. VAT

£36.19

High Temperature & Pressure Relief Pump

Part number: 23745

Pump House, automatic high temperature hot water pump with 5 litre stainles...

  • New Product

    Just arrived. Latest version, etc.

Ex. VAT

£609.23

Inc. VAT

£731.08

Immersion Heater 14" Titanium - Unvented Cylinder

Part number: 23744

Tesla 3 kW, 14" long immersion heater, 1.3/4" BSP connection for use with u...

  • New Product

    Just arrived. Latest version, etc.

Ex. VAT

£41.78

Inc. VAT

£50.14

Ultrasteel Unvented Indirect Cylinder - 300 Litres

Part number: 23404

Duplex stainless steel shell with stainless steel thermostat pockets, insul...

Ex. VAT

£621.61

Inc. VAT

£745.93

Expansion Vessel for Unvented Hot Water - 24 Litres

Part number: 21196

Potable Water expansion vessel - 24 litre with butyl bladder membrane manuf...

Ex. VAT

£34.53

Inc. VAT

£41.44

Expansion Vessel Service Valve 3/4" BSP Union x BSP PM

Part number: 23730

Service valve for sealed heating system expansion vessel.

  • New Product

    Just arrived. Latest version, etc.

Ex. VAT

£13.50

Inc. VAT

£16.20

Expansion Vessel for Unvented Hot Water - 2 Litres

Part number: 21192

Potable Water expansion vessel - 2 litres with butyl bladder membrane manuf...

Ex. VAT

£20.15

Inc. VAT

£24.18

Stelflow Indirect - 180 Litre

Part number: 20421

Stelflow Indirect - 180 Litre Duplex stainless steel shell with stainless s...

Ex. VAT

£444.90

Inc. VAT

£533.88

Potable Vessel Mounting Brackets 8 to 18 Litre Vessels

Part number: 22045

8 to 18 Litre Vessels Wall mounting bracket, securing band and fixings....

Ex. VAT

£5.37

Inc. VAT

£6.44

Temperature & PRV Short Probe 7 Bar 1/2" TM x 15mm

Part number: 22078

Designed to prevent damage to an unvented hot water cylinder by relieving e...

Ex. VAT

£19.86

Inc. VAT

£23.83

Immersion Heater 14" Incoloy - Unvented Cylinder

Part number: 23743

Tesla 3 kW, 14" long immersion heater, 1.3/4" BSP connection for use with u...

  • New Product

    Just arrived. Latest version, etc.

Ex. VAT

£24.07

Inc. VAT

£28.88

Expansion Vessel for Unvented Hot Water - 12 Litres

Part number: 21194

Potable Water expansion vessel - 12 litre with butyl bladder membrane manuf...

Ex. VAT

£25.91

Inc. VAT

£31.09

Potable Vessel Mounting Brackets 24 Litre Vessel

Part number: 22064

24 Litre Vessel Wall mounting bracket, securing band and fixings....

Ex. VAT

£15.91

Inc. VAT

£19.09

Expansion Vessel for Unvented Hot Water - 8 Litres

Part number: 21193

Potable Water expansion vessel - 8 litres with butyl bladder membrane manuf...

Ex. VAT

£23.33

Inc. VAT

£28.00

Ultrasteel Unvented Indirect Cylinder - 210 Litres

Part number: 23402

Duplex stainless steel shell with stainless steel thermostat pockets, insul...

Ex. VAT

£528.55

Inc. VAT

£634.26

Temperature & PRV Short Probe 4 Bar 1/2" TM x 15mm

Part number: 22076

Designed to prevent damage to an unvented hot water cylinder by relieving e...

Ex. VAT

£19.86

Inc. VAT

£23.83

Temperature & PRV Short Probe 6 Bar 1/2" TM x 15mm

Part number: 22077

Designed to prevent damage to an unvented hot water cylinder by relieving e...

Ex. VAT

£20.28

Inc. VAT

£24.34

Temperature & PRV Short Probe 7 Bar 3/4" TM x 22mm

Part number: 24138

PRV. Designed to prevent damage to an unvented hot water cylinder by reliev...

  • New Product

    Just arrived. Latest version, etc.

Ex. VAT

£19.33

Inc. VAT

£23.20

Temperature & PRV Short Probe 4 Bar 3/4" TM x 22mm

Part number: 22994

Designed to prevent damage to an unvented hot water cylinder by relieving e...

Ex. VAT

£19.47

Inc. VAT

£23.36

Temperature & PRV Short Probe 10 Bar 3/4" TM x 22mm

Part number: 22995

Designed to prevent damage to an unvented hot water cylinder by relieving e...

Ex. VAT

£20.07

Inc. VAT

£24.08

Ultrasteel Solar Unvented Indirect Cylinder - 210 Litres

Part number: 23406

Duplex stainless steel shell with stainless steel thermostat pockets, insul...

Ex. VAT

£791.76

Inc. VAT

£950.11

Ultrasteel Unvented Indirect Cylinder - 150 Litres

Part number: 23400

Duplex stainless steel shell with stainless steel thermostat pockets, insul...

Ex. VAT

£483.63

Inc. VAT

£580.36

Stelflow Direct - 150 Litre

Part number: 20413

Stelflow Direct - 150 Litre Duplex stainless steel shell with stainless ste...

Ex. VAT

£355.91

Inc. VAT

£427.09

Stelflow Direct - 120 Litre

Part number: 20412

Stelflow Direct - 120 Litre Duplex stainless steel shell with stainless ste...

Ex. VAT

£321.03

Inc. VAT

£385.24

Stelflow Direct - 90 Litre

Part number: 20411

Stelflow Direct - 90 Litre Duplex stainless steel shell with stainless stee...

Ex. VAT

£305.81

Inc. VAT

£366.97

Ultrasteel Solar Unvented Indirect Cylinder - 300 Litres

Part number: 23408

Duplex stainless steel shell with stainless steel thermostat pockets, insul...

Ex. VAT

£861.87

Inc. VAT

£1,034.24

Ultrasteel Solar Unvented Indirect Cylinder - 250 Litres

Part number: 23407

Duplex stainless steel shell with stainless steel thermostat pockets, insul...

Ex. VAT

£765.41

Inc. VAT

£918.49

Ultrasteel Solar Unvented Indirect Cylinder - 180 Litres

Part number: 23405

Duplex stainless steel shell with stainless steel thermostat pockets, insul...

Ex. VAT

£729.40

Inc. VAT

£875.28

Ultrasteel Unvented Indirect Cylinder - 250 Litres

Part number: 23403

Duplex stainless steel shell with stainless steel thermostat pockets, insul...

Ex. VAT

£571.86

Inc. VAT

£686.23

Showing 30 out of 48 products

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