Wednesday, 26 September 2012

How to add an inhibitor to your central heating system

The mysteries of water treatment are no longer held exclusively by plumbers. Homeowner awareness of the benefits of water treatment is breaking into the wider consciousness, helped by initiatives such as the Energy Saving Trust Recommended scheme launching an entirely new product category for Chemical Inhibitors.

With the widening realisation that there are energy and money savings to be had with a properly cleaned and treated central heating system, many homeowners are increasingly interested in trying to achieve some of these benefits in their own properties.

However, when it comes to adding the treatment to the system, the process can be a little daunting. But with a corrosion and scale inhibitor, there is a choice of simple options. Here’s a short explanation of two popular ways in which our inhibitor can be dosed into your central heating system.


A one litre bottle is sufficient to treat a normal central heating system, which we define by its number of radiators. If you have a system with 10 or fewer radiators, one bottle will be sufficient. If you have a system with more than 10 radiators, use two bottles, and don’t worry, – the product is forgiving of some overdosing.

To dose into the system, first simply determine what kind of system you have if you don’t already know. The two kinds of system are open and sealed. If you have two water tanks in the loft, you likely have an open system and the system expansion tank is usually the smaller of these two water tanks.

To add the inhibitor, simply partially drain the system from a low point such as a downstairs radiator before adding it to the expansion tank and refilling the system with fresh water through the expansion tank. If there is only one tank in the attic, your system is sealed and can be dosed using a dosing kit via the boiler filling loop or other access point.


Available as a 400ml aerosol, adding this product to a central heating system is easy and can be done via the boiler filling loop or a radiator bleed point. The beauty of this product is that no drainage is required and it is designed for mess-free application in under thirty seconds. Each aerosol comes with a disposable adaptor, providing everything you need to dose the system straight away. Easy-to-follow step-by-step application instructions are provided with the product.

The following video also demonstrates how simple it is to apply Rapid-Dose™ through either method: the boiler or a radiator. I hope that having read this post and watching the Rapid-Dose™ video, you feel ready to protect your system with a chemical inhibitor using whichever application method seems simplest to you.

1 comment:

  1. very informative piece! but if you need professional help to your plumbing and heating, contact Stevenage Plumbers.