Toggle Nav

Free delivery on orders above £250.

Hurry! Offer ends at midnight May 23, 2024.

fast delivery
Fast Delivery
With our own fleet.
fast delivery

Trusted Service Award
fast delivery
Free Click and Collect
Click and collect from any of our stores.

Sentinel X400 Sludge Remover 1 Litre

£14.34 £11.95
age verification

Age Verification

This product can only be sold to customers over 18 years of age and we will require your date of birth on your account at checkout.

+ -

Sentinel X400 1 litre sludge remover is a powerful non-acid treatment, specially designed to restore circulation to radiators and pipework of older heating systems. By eliminating the build-up of magnetite sludge, X400 eliminates cold spots and restores full heat emission. It also helps to improve and maintain system efficiency and conserve fuel.

  • Can be used in all types of systems
  • Prepares for the installation of new boilers, pumps or panels
  • Does not cause pin-holing or leaks
  • New systems should be cleaned with Sentinel X300 system cleaner
Read more
Manufacturer Product Number
Product Type
Sludge Remover
Weight (KG)
Maintenance Use
Heating System Chemicals
System use
System cleaner
Customer Questions
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 vary - see individual product specifications, 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 are fulfilled, you will get the maximum life and support from your new purchase.

Please mind that only logged in users can submit questions.
No reviews have been left for this product yet. Please be the first to leave a review if you purchase.
Helpful tools
MRCH BTU calculator BTU Calculator
MRCH find an installer Find an Installer