An Economy 7 cylinder is designed to exploit 'off-peak' electricity, typically available throughout the night. A feature of an E7 cylinder or tank is the addition of a second immersion heater (unlike a standard direct cylinder that only has one). The lower of the two elements is typically connected to the economy supply/tariff, the upper heater is usually used as a boost element and operated manually when demand for hot water is high. Our cylinders are supplied with the two immersion heater bosses (the bit you screw the heater into) but immersion heaters are sold separately. Please enquire.

Because you are heating your cylinder overnight it is important to not to loose the stored heat by the morning. Economy 7 cylinders are therefore fitted with an extra thick jacket of insulation - typically 60mm thick, as opposed to the 30mm jacket on a standard cylinder.

The insulation, known as flexilag, is a mineral product rather like the material used to insulate the wall cavity in a house. Because it is a natural product it has no nasty bye-products in its manufacture, will not give of poisonous gasses in the event of a fire and will naturally decompose in the greater scheme of things.

What's more, Flexilag outperforms the polyurethane foam many manufacturers use these days for convenience. And the cost? You be delighted to know that our cylinders are not only cheaper to buy, they will also cost less to run over the span of their lifetime. The thermal efficiency of Flexilag can outperform sprayed on foam by up to 40%.

Value, Quality, Efficiency and Discount !

PLEASE NOTE: Economy 7 cylinders have a 60mm thick insulating jacket for enhanced performance. You must add this to the dimensions shown on the table below for over all measurement.

DIRECT ECONOMY 7 CYLINDERS to British Standard

• 1" bosses
• 2 x 2 1/4" IMH boss (Immersion heaters not included)
• 60mm Rockwool Insulation

• 15, 22 or 28mm compressions (free)
• Incalloy Immersion heater (£23.96 (each) - 3kW, 14" or 22")

• Shower take off (free)
• Secondary Return (free)

Prices as of May 2010.

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INDIRECT ECONOMY 7 CYLINDERS to British Standard

• 1" bosses
• 2 x 2 1/4" IMH boss (Immersion heaters not included)
• 60mm Rockwool Insulation

• 15, 22 or 28mm compressions (free)
• High Recovery Coil (£35)

• Shower take off (free)
• Secondary Return (free)
• Incalloy Immersion heater (£23.96 (each) - 3kW, 14" or 22")

Prices as of May 2010.

Gas Appliance Guide - Still bringing you the BEST prices in the UK!

Somebody offered to price match? Click here to read more.....

 (Further information  Cylinder Terminology Explained)

All cylinders are produced under BS EN ISO 9001:2000 Quality Systems. All Cylinders are manufactured and compliant with Part L Building Regulations 2002.

All cylinders are independently approved for compliance with the Water Supply (Water Fittings) Regulations 1999.

Supplied fully insulated with a thermally advanced and environmentally friendly rockwool jacket, offering continued high performance throughout the life of the cylinder

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PLEASE NOTE: Economy 7 cylinders have a 60mm thick insulating jacket for enhanced performance. You must add this to the dimensions shown on the table below for over all measurement.