Indirect 812 x 450 Stainless Steel Vented Cylinder

£144.00 Excl. VAT £172.80 Incl. VAT Best Buy

Availability: In stock

This indirect 812 x 450 stainless steel vented cylinder complete with foam lagging has a capacity of 117 litres which is the equivalent to the 900 x 450 model in copper.

  • All units come complete with 22mm compression nuts & olive for ease of fitting.

  • Special incoloy immersion heater available separately.

  • Capacity equivalent for a standard copper cylinder replacement.

  • Tapping heights similar to British Standard 1566 so ideal for replacements.

  • Any pipe rework would be minimal.

  • Complies with Part L of Building Regulations.

  • Insulation to Part L1B.

  • Extended Cylinder connections so no insulation cutaway required, all connections fully insulated to further reduce heat loss.

  • Not as high risk of theft as copper products.

  • Secondary return fitted as standard.

  • 10 year guarantee.

RM Cylinders
Manufacturer Product Number
Manufacturers Warranty
1 Year (Subject to Manufacturers T&C's)
Cylinder Type
Cylinder Material
Stainless steel Cylinder
Height (Metric)
Width (Metric)
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 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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