how do i add sludge remover to a central heating system

[twace]

I have a wall mounted valliant boiler and I have an issue with sludge. Can anyone give me an idiots guide to how I get the sludge remover into the system. I bought Senitel X400 today ?

 

[footprints]

Which type of X400? A big bottle, a cartridge or the rapid dose aerosol can?
Is it a sealed or open system?

 

[twace]

a one litre bottle but I am now wondering if I should have got sentinel 800. It is a sealed boiler

 

[footprints]

Have a look here to decide which product you need click on Choosing a Cleaning Chemical near the bottom of the page.

http://www.sentinel-solutions.net/p...heating/liquids/x800-jetflo-ultimate-cleaner/

If the system is sealed you will need to know where the filling loop is to recharge it.

You need either the cartridge or the rapid dose aerosol can product.

I used this recently, quite easy.

http://www.screwfix.com/p/sentinel-rapid-dose-x400-sludge-remover-400ml/85045?_requestid=68106