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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.

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Rated 5 out of 5 by 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, 23 Nov 2015
Rated 5 out of 5 by 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. 30 Sep 2015
Rated 5 out of 5 by 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. 10 Jul 2015
Rated 5 out of 5 by 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. 29 Apr 2015
  • 2015-11-25 T09:54:18.801-06:00
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1 Question  1 Answer

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When and how would you use Sentinel X400 in your central heat
16 Aug 2015
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, Electrician
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Hi there
If you are tackling circulation problems, identifiable as cold spots in radiators, most often caused by sludge build-up. The formation of this sludge is almost impossible to completely prevent and it often settles in low flow areas of the system.

X400 High Performance Cleaner is the best central heating cleaner for this job as it breaks up, lifts and suspends this sludge, then allowing it to be flushed out of the system. In order to do this, it should be circulated, ideally at normal operating temperature, with all valves open and the pump set to maximum flow for a minimum period of 2 hours or until satisfactory performance is restored. In badly fouled systems, a period of circulation of up to 4 weeks is recommended

best regards
Sentinel Customer Services
17 Aug 2015
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  • 2015-11-25 T09:46:05.783-06:00
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Download more info (pdf)

Brand Sentinel
Model No X400
Pack Size 1
Product Type System Restorer
Sealant Adhesive Volume 1 Ltr
Total Product Weight 1102 kg
Volume 1 Ltr