Sentinel X400 System Restorer 1Ltr

Product Code: 89458
Sentinel X400 System Restorer 1Ltr
Product Code: 89458
1Ltr. Apply to existing systems for the removal of sludge and deposits. Iron oxide is broken down and dispersed through flushing.


  • Removes Sludge
  • Breaks Down Iron Oxide
  • Removes Sludge
  • Breaks Down Iron Oxide
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Safety Data Sheet
€20.95 Incl. 20% VAT
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Additional Information
Technical Specification
  • Brand : Sentinel
  • Sealant Adhesive Volume : 1 Ltr
  • Product Type : System Restorer
  • Volume : 1 Ltr
  • Model No : X400
  • Pack Size : 1
  • Manufacturer Guarantee : 1 Year Guarantee
  • Pieces in Pack/Case : 1
Product Contents
Delivery & Returns


Standard delivery: €15

Free delivery on all orders over €70.00

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Hopefully you won't need to return an item, however, if you do, it is our aim to make this as simple as possible. By following the guidance below you can help us to help you when a product is not what you expected, or is faulty. Your statutory rights are not affected by this guidance.


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Sentinel X400 System Restorer 1Ltr is rated 4.6 out of 5 by 43.
Rated 5 out of 5 by from Restoring old central heating Using it in an old central heating system which has not been cleaned in decades. Will leave in the system for 4 weeks. May be my imagination, but after a couple of days, already there seems to be an improvement in some of the radiator cold spots.
Date published: 2016-12-14
Rated 5 out of 5 by from So good I used it again Second time using this first was several years ago. It worked well then. I have come up against a rather stubborn blockage in very old system and put the two bottles in an empty system. Topped up with water. Early days yet but previous cold spots are showing signs of warmth after only two days. Will keep my fingers crossed
Date published: 2016-12-06
Rated 5 out of 5 by from Quality product. Quality product easy to use. Did a great job of cleaning the heating system.
Date published: 2016-12-04
Rated 5 out of 5 by from Did the job I had a couple of radiators with cold spots at the bottom, these have improved since adding the product. I am leaving it for a week before flushing but seems to have done what I needed
Date published: 2016-11-22
Rated 5 out of 5 by from Excellent System Cleaner A great way to clean a heating system without the need of a powerflush. Removes the cold spots in rads and helps with the efficiency of the whole system
Date published: 2016-11-10
Rated 5 out of 5 by from central heating cleaner Used this on system with micropore and 15mm pipes. Works well no more cold spots in any radiators. Easy to add, drained some water off to de-pressurise added contents to radiator via plug. Re-pressurised system and let it do its thing.
Date published: 2016-01-31
Rated 5 out of 5 by from Excellent for old systems I have an 8mm microbore system that was installed in 1979. Despite having been power flushed in the last 2 years, the system really isn't working that well. I know several rads don't even warm up. I know that there are blockages too. We live in a very hard water area. Having added X400 in to the system and left to run for 2 days, Radiatprs that haven't worked now do. The hot water system is hotter, in fact, all the rads in the house are much hotter. The X400 was added to an empty rad and left to run through the system. As per the instructions/advice all rads were left fully open and the system was heated up. After 48 hours the difference can be felt.
Date published: 2016-01-13
Rated 5 out of 5 by from Sentinel X 400 Had a few issues with the central heating I was recommended this product so followed the instructions all the rubbish that came out of the system was quite shocking finished the job and now all working great,
Date published: 2015-11-23
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