Economy 7 1200 X 450 Indirect Copper Cylinder

£257.21 Excl. VAT £308.65 Incl. VAT Best Buy

Availability: In stock

Economy 7 indirect copper cylinders are for use in conjunction with off-peak electricity tariffs. This 1200 x 450mm cylinder incorporates two side entry immersion bosses: the bottom heater is for the Economy 7 overnight tariff, with the top one being a day-time booster if needed. A baffle plate fitted over the cold feed minimises mixing of hot and cold water.

  • Grade 3 lagging

  • Capacity: 166 litres

  • Metric size: 1200 x 450

  • Imperial size: 48 x 18

Please note: Cylinder images are representative only, and tappings may vary.
RM Cylinders
Manufacturer Product Number
Manufacturers Warranty
1 Year (Subject to Manufacturers T&C's)
Cylinder Type
Cylinder Material
Copper Cylinder
Product Questions
How do I know if I need a vented or unvented copper storage cylinder? I have Economy 7 tariff.
The type of cylinder required depends on the your system setup. If the cylinder is fed by a cold water loft tank then you will require a vented cylinder. Whereas if you the cylinder is fed directly from the mains water in to the property then you will require an unvented cylinder.
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are the dimensions with lagging if not what do you add for lagging, what are the pipe fitting sizes
The dimensions of the vented foam lagged cylinders on our website are for just the cylinder as this is how the manufacturer lists them. The lagging is 35mm on standard cylinders and 50mm on economy 7 cylinders. So for standard cylinders you need to add 70mm to the width (35mm each side) and for the economy 7 cylinders you need to add 100mm to the width (50mm each side). The immersion heater connection is 2.1/4" and the other pipe connections are generally 1" but on some of the larger size cylinders the connections are 1.1/4"
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Are your products guaranteed?

Yes all our products come with a guarantee.

Guarantees or warranties vary, by product and manufacturer.

All our products are guaranteed for a minimum of 1 year (radiators 10 years, copper tube 25 years) but many offer longer warranties from the manufacturer, which you may need to register for.

On each product, under the specification tab, you will find more information on the guarantee or Warranty.

Follow links through to various manufacturers sites, as each manufacturer will have its own terms and conditions for qualifying for longer warranties.

You do not want to miss out by getting the wrong installer for some boilers etc.

As Boilers and radiators are installed by third parties, they do have to install in compliance with regulations and manufacturer standards to get the full benefit of the warranty.

As long as these ar fulfilled, you will get the maximum life and support from your new purchase.

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What is the difference between a Vented and an Unvented Cylinder?

The main difference between a vented and unvented water storage cylinder is that an unvented hot water cylinder takes its water supply directly from the mains.

Whereas a vented cylinder is connected to a water tank by a vent pipe

You can get hot water out of an unvented cylinder at a much better pressure than a traditional vented cylinder as it is pressurised.

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