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Express delivery for Thursday Available Until 4pm Tomorrow
UK Mainland Only,
3pm cut-off for Highlands and Islands


 

 

 

 

Express delivery for Thursday Available Until 4pm Tomorrow
UK Mainland Only,
3pm cut-off for Highlands and Islands


Sentinel

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A general purpose treatment for total protection against scale and corrosion in all types of indirec..
£15.88 £9.96
Ex Tax: £8.30
A unique life-long system treatment for the elimination of limescale and boiler noise. Safe to use ..
£15.58
Ex Tax: £12.98
Flushes out flux and installation debris from new indirect central heating systems and those up to ..
£17.17
Ex Tax: £14.31
A ruthlessly efficient way to eliminate the build-up of magnetite sludge X400 is the quick and easy..
£15.58
Ex Tax: £12.98
Sentinel X800 Jetflo Ultimate Cleaner is a heavy duty cleaning formulation designed to remove corros..
£15.58
Ex Tax: £12.98
Many untreated or improperly treated central heating systems suffer from an accumulation of debris, ..
£59.99
Ex Tax: £49.99
The Sentinel X100 Test Kit is a simple way to check that a system treated with Sentinel X100 Inhibit..
£4.25
Ex Tax: £3.54
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Heating Controls Online is rated 4.90 stars by Reviews.co.uk based on 2104 merchant reviews

4.90 / 5 Rating
2104 Reviews
The Siemons central heating and hot water controler was a direct replacemnt for an old unit,it arrived quickly and did what it said on the tin a direct replacement,that took 1/2 an hour to change. great job 1
Prompt response to order and speedy delivery.
Easy to place order and very good delivery arriving on stated day.