Water Storage
There are two main types of water storage cylinder: direct and indirect.
Direct cylinders are a standard hot water tank found in most homes, with water sourced from a cold water tank usually in the loft or roof space. This type of cylinder is used when water for washing from the cylinder circulates directly through the boiler. There is no heating coil, so the water is heated directly by the immersion heaters located inside the cylinder – often meaning the recovery time is longer than with an indirect cylinder.
Indirect cylinders are used where water that’s used to heat the boiler and radiators is used to heat the hot water in the cylinder, but is kept totally separate from the water used for washing in the cylinder. Water from the boiler and radiators continuously re-circulates through the coil in the cylinder to heat the water, but never comes into direct contact with the water used for washing. These cylinders normally operate at around 80°C.
Vaillant uniSTOR 250 Unvented Hot Water Cylinder
£1,207.80
£1,006.50
4 Available for Delivery
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Vaillant uniSTOR 300 Unvented Hot Water Cylinder
£1,281.06
£1,067.55
6 Available for Delivery
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Tesla 14" Incoloy Unvented 3kW Immersion Heater
£37.08
£30.90
103 Available for Delivery
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Unvented Cold Water Group Set
£43.64
£36.37
67 Available for Delivery
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Evolve 15mm x 1/2" 4bar Unvented T & P Relief Valve
£17.86
£14.88
1312 Available for Delivery
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Evolve 15mm x 1/2" 6bar Unvented T & P Relief Valve
£21.44
£17.87
950 Available for Delivery
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Evolve 15mm x 1/2" 7bar Unvented T & P Relief Valve
£23.48
£19.57
416 Available for Delivery
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Evolve 15mm x 1/2" 10bar Unvented T & P Relief Valve
£25.52
£21.27
964 Available for Delivery
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Evolve 22mm x 3/4" 6bar Unvented T & P Relief Valve
£31.97
£26.64
1392 Available for Delivery
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Evolve 22mm x 3/4" 7bar Unvented T & P Relief Valve
£34.09
£28.41
1346 Available for Delivery
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Evolve 22mm x 3/4" 10bar Unvented T & P Relief Valve
£38.36
£31.97
1336 Available for Delivery
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Unvented Cylinder Tundish
£8.83
£7.36
3618 Available for Delivery
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Flow-Thru 80 L Accumulator Tank
£382.68
£318.90
Available for back-ordered delivery
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Flow-Thru 170 L Accumulator Tank
£617.22
£514.35
Available for back-ordered delivery
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Challenger 200 L Accumulator Tank
£492.84
£410.70
20 Available for Delivery
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Challenger 250 L Accumulator Tank
£558.00
£465.00
16 Available for Delivery
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Challenger 300 L Accumulator Tank
£595.62
£496.35
20 Available for Delivery
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Challenger 450 L Accumulator Tank
£943.92
£786.60
13 Available for Delivery
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SuperFlow INT 500L Accumulator Tank
£1,669.97
£1,391.64
Available for back-ordered delivery
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SuperFlow INT 750L Accumulator Tank
£1,866.44
£1,555.37
1 Available for Delivery
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ThermoWave 12 Litre Unvented Potable Expansion Vessel c/w Bracket
£30.96
£25.80
103 Available for Delivery
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ThermoWave 18 Litre Unvented Potable Expansion Vessel c/w Bracket
£30.96
£25.80
88 Available for Delivery
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ThermoWave 24 Litre Unvented Potable Expansion Vessel c/w Bracket
£30.54
£25.45
80 Available for Delivery
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Evolve Expansion Vessel Kit
£23.62
£19.68
569 Available for Delivery
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BiWorld Expansion Vessel Wall Mounting Kit 2 - 25 Litre
£4.54
£3.78
1017 Available for Delivery
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BiWorld Expansion Vessel Wall Mounting Kit 35 - 50 Litre
£5.08
£4.23
132 Available for Delivery
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ThermoWave White 2 L Potable Multifunction Expansion Vessel (1/2" Thread)
£20.81
£17.34
126 Available for Delivery
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ThermoWave White 2 L Potable Multifunction Expansion Vessel (3/4" Thread)
£20.81
£17.34
175 Available for Delivery
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ThermoWave 12 Litre Potable Expansion Vessel
£28.97
£24.14
197 Available for Delivery
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ThermoWave 18 Litre Potable Expansion Vessel
£31.78
£26.48
103 Available for Delivery
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