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
€21.45 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
  • 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 4.578947368421052 out of 5 by 38.
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
Rated 5 out of 5 by from Central Heating System Cleaner If you are restoring an older CH system, this is THE cleaner to use. It loosens sludge, rust and general dirt. Leave it for up to 2 weeks then flush with clean water and add inhibitor.
Date published: 2015-09-30
Rated 5 out of 5 by from Sentinel Ultimate Cleaner Used this after fitting two new radiators as system was slow to fill ,run for over two hours and left in overnight ,drained and refilled using no nonsense inhibitor so far system running ok only used to heat water so far but it does seem to be hotter,system certainly quieter.
Date published: 2015-07-10
Rated 5 out of 5 by from Sentinel X400 System Restorer We had a serious problem with noise coming from the pump in our open vented CH system. I used Sentinel restorer to give the system a really good cleaning and then took care to flush this out thoroughly. I topped up with Sentinel 100 inhibitor and the results have been great. The system can now run hotter than before increasing the efficiency of the rads and making the house much warmer. I would recommend these products to all CH owners.
Date published: 2015-04-29
Rated 5 out of 5 by from Sentinel X400 Sludge Remover Have been having problems with some of my radiators not getting hot, put the liquid in and within minutes the problem was cured. Could not believe how quickly it worked.
Date published: 2015-04-17
Rated 5 out of 5 by from Brilliant! For the size of our ancient one pipe CH system, I had to buy two a little pricey. But what a difference! The boiler is a lot quieter, the water is a lot hotter and several of the radiators that were only ever luke warm are now hot. We should have used it 10 years ago when we first moved in this property.
Date published: 2015-04-07
  • 2016-10-21T08:05CST
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