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Sentinel X800 Ultimate Cleaner 1Ltr (84921)

1Ltr. A powerful cleaning agent for central heating systems. Specially developed for use with power flushing equipment. Removes iron and calcium-based deposits to restore circulation and system efficiency. Effective hot or cold. No neutralisation procedure is needed.

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£19.99INC VAT (£19.99/Ltr)

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Sentinel X800 Ultimate Cleaner 1Ltr is rated 4.8 out of 5 by 38.
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Rated 5 out of 5 by from Almost like magic I had a poor performing central heating system, cold rads, boiler not firing correctly, heat around the house was not good and boiler failed to fire correctly. I read the many reviews about what to use and went for Sentinel X800 for 3 reasons, good reviews on Screwfix and the fact that it was fast acting and most importantly would work with the cold water in the system as the boiler was not firing. fully removed 1 rad and cleaned it with a hose pipe then refitted and before refilling I put the system cleaner in via the Flomasta Universal Filling Kit (8145K) which I also purchased. The filled the rad with water. The pump soon pushed the solution around the system which seemed to clear some blockages as the boiler then fired. Left it running of r 2 solid hours and rads were getting hotter than normal, rads that usually struggled to get warm were getting very hot. I left the solution in for 4 days to fully ensure the system was cleaned and then drained. Colour of water was blacker than black, but I have a heating system that is not working well and I no longer have cold rads or rads not heating up. All in all about a full day to do all the work, but it was worth it and this product made it significantly easier.
Date published: 2017-04-20
Rated 5 out of 5 by from Good stuff, will buy everytime My central heating was fixed using this stuff, working 100% with it. I was a bit scared of it so only kept it in for 24 hrs. Drained it from the system . replaced it with Sentinal inhibitor and my heating was back to its poor self. Put some more of the cleaner in and it is 100% working again. It has been running for 2 weeks now. I am getting scared again. I am keen to drain it. I am thinking about it, but tthe system is running so well? a delema!
Date published: 2017-02-17
Rated 5 out of 5 by from X800 Central Heating Cleaner Having used this product in the past and needing to unblock a couple of radiators that wasn't working fully I decided to put some of the X800 cleaner into the system to help clear out the blockages. Its only been in a couple of days but the flow thought the radiators is much better and I'll leave it in the system for a bit longer before I flush and refill it back up.
Date published: 2017-02-02
Rated 4 out of 5 by from Very happy Struggling with yet another heating system sludged up and thought Id give this ago.. Was not disappointed. Added to the system and with 8 hours it was a completely different system. Don't forget after using this to protect your system with inhibitor X100 works well!
Date published: 2017-01-27
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  • bvseo_bulk, prod_bvrr, vn_bulk_1.0.0-hotfix-1
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_38
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Sentinel X800 instead of X400?

can I use Sentinel X800 instead of X400? I want to leave it in the system for upto 4 weeks to have a thorough clean. thanks.
Asked by: DIYerandHomeMaker
Hi there, Sentinel X800 is recommended to be in the system for upto 48hrs. If you want to leave the cleaner in for upto 4 weeks we recommend using the Sentinel X400. For further information please visit our website. Kind regards Customer Service
Answered by: Sentinel Product Help
Date published: 2017-04-26

can I put the cleaner in to my combi central heating via a radiator.

Asked by: Ziphonk
Hi there, Sentinel X800 Fast Acting Cleaner can be added to the system in a number of ways. For open vented systems, dose via the expansion tank during the final fill. For empty sealed systems, add to any convenient point before filling. For full sealed systems, use a Sentinel Dosing Vessel to inject via the filling loop or other access point. It can also be dosed through a powerflushing machine. Kind regards Customer Service
Answered by: Sentinel Product Help
Date published: 2017-04-01

Does this work by acidic action taking rust back to bare metal or mobilise fallen deposits. I am considering use on a decreased petrol tank

Degreased!
Asked by: Chissteve
This is NOT what you want for your petrol tank! If it's a bike tank, remove the valves, fill it with old nuts and bolts or stones and shake it like a big maraca (for a loooong time). Clean it out and use Petseal...
Answered by: Bezz
Date published: 2017-04-22

Is this safe to use in systems with plastic pipes?

Asked by: CPD87
Hello, Yes, Sentinel X800 is compatible with plastic pipes. Kind regards, Customer Services,
Answered by: Sentinel Product Help
Date published: 2017-03-12

How would I use this in a gravity fed system? Pour it in the header tank then where do I drain it from?

Asked by: Jay125
Hi there, Yes pour into the header tank, tie up the make-up ball valve so no fresh water enter the header tank and then drain a volume of water from a ground level drain point until all the contents of the header tank are drawn into the system. Untie make-up valve to allow header tank to fill. The alternative is to use rapid dose format. For further information please visit out website or contact us. Kind regards Customer Service
Answered by: Sentinel Product Help
Date published: 2017-03-12
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Specification
Brand Sentinel
Manufacturer Guarantee 1 Year Guarantee
Model No X800
Pack Size 1
Pieces in Pack/Case 1
Product Type Ultimate Cleaner
Volume 1 Ltr

Downloads

Safety Data Sheet (COSHH)