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500ml. Protects against corrosion and limescale formation to maintain system efficiency. Suitable for mixed metal systems including aluminium. 500ml treats 100 litres. BuildCert approved.

500ml. Protects against corrosion and limescale formation to maintain system efficiency. Suitable for mixed metal systems including aluminium. 500ml treats 100 litres. BuildCert approved.
Average Customer Rating:
4.455 out of 5
4.5
 out of 
5
(33 Reviews) 33
Open Ratings Snapshot
Rating Snapshot (33 reviews)
5 stars
19
4 stars
11
3 stars
2
2 stars
1
1 star
0
32 of 33(97%)reviewers would recommend this product.
Customer Reviews for No Nonsense Central Heating Inhibitor 500ml
Review 1 for No Nonsense Central Heating Inhibitor 500ml
Overall Rating: 
5 out of 5
5 out of 5
Value: 
5 out of 5
5 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
3 out of 5
3 out of 5
Reliability: 
3 out of 5
3 out of 5
Would you recommend this product? Yes
Overall Rating: 
5 out of 5
5 out of 5
Value: 
5 out of 5
5 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
3 out of 5
3 out of 5
Reliability: 
3 out of 5
3 out of 5
Cheap Central Heating Inhibito
17 Nov 2013
By AndyMcK
, Cheshire
"Central heating inhibitor???, hopefully it will help stop corrosion of the system. Easy to install into a new bathroom (towel rail type) system but need to depressurise the system first. Can't comment on long term performance but it's a proven chemical package treatment so hopefully will work OK."
1 of 1 people found this review helpful.
Review 2 for No Nonsense Central Heating Inhibitor 500ml
Overall Rating: 
5 out of 5
5 out of 5
Value: 
5 out of 5
5 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
1 out of 5
1 out of 5
Would you recommend this product? Yes
Overall Rating: 
5 out of 5
5 out of 5
Value: 
5 out of 5
5 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
1 out of 5
1 out of 5
All in all...
13 Nov 2013
By DIYerDiesel
, Braintree
"Seems to do the job, easy to add. Recommend a system flush with Sentinel X400 first before adding. That made the big difference!"
Review 3 for No Nonsense Central Heating Inhibitor 500ml
Overall Rating: 
5 out of 5
5 out of 5
Value: 
5 out of 5
5 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
5 out of 5
5 out of 5
Would you recommend this product? Yes
Overall Rating: 
5 out of 5
5 out of 5
Value: 
5 out of 5
5 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
5 out of 5
5 out of 5
It says, it does.
29 Oct 2013
By walwen
, Gwynedd, Wales
"Helps to keep the system clean, therefore efficient. In other words it helps to deliver more heat for less cost - easier than changing fuel supplier!"
Review 4 for No Nonsense Central Heating Inhibitor 500ml
Overall Rating: 
5 out of 5
5 out of 5
Value: 
5 out of 5
5 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
5 out of 5
5 out of 5
Would you recommend this product? Yes
Overall Rating: 
5 out of 5
5 out of 5
Value: 
5 out of 5
5 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
5 out of 5
5 out of 5
central heating
6 Sep 2013
By sparkeee
, grimsby
"Good quality product at half the price of other products on the market"
Review 5 for No Nonsense Central Heating Inhibitor 500ml
Overall Rating: 
5 out of 5
5 out of 5
Value: 
5 out of 5
5 out of 5
Features: 
4 out of 5
4 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
5 out of 5
5 out of 5
Would you recommend this product? Yes
Overall Rating: 
5 out of 5
5 out of 5
Value: 
5 out of 5
5 out of 5
Features: 
4 out of 5
4 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
5 out of 5
5 out of 5
Good, reliable inhibitor
13 Aug 2013
By Thermionic
, North Devon
"I have set up and refurbished several systems using this product. Never had any issues with it. Done what it is supposed to do - no frills but a good product at a good price."
Review 6 for No Nonsense Central Heating Inhibitor 500ml
Overall Rating: 
5 out of 5
5 out of 5
Value: 
5 out of 5
5 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
5 out of 5
5 out of 5
Would you recommend this product? Yes
Overall Rating: 
5 out of 5
5 out of 5
Value: 
5 out of 5
5 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
5 out of 5
5 out of 5
A good product
9 Jan 2013
By Thermo001
, Barnstaple - Devon
"I always use and recommend this product - it has always served me well and also those to whom I have recommended it. Seems to me as good at doing the job as the more expensive alternatives"
1 of 1 people found this review helpful.
Review 7 for No Nonsense Central Heating Inhibitor 500ml
Overall Rating: 
5 out of 5
5 out of 5
Value: 
4 out of 5
4 out of 5
Features: 
4 out of 5
4 out of 5
Performance: 
4 out of 5
4 out of 5
Reliability: 
4 out of 5
4 out of 5
Would you recommend this product? Yes
Overall Rating: 
5 out of 5
5 out of 5
Value: 
4 out of 5
4 out of 5
Features: 
4 out of 5
4 out of 5
Performance: 
4 out of 5
4 out of 5
Reliability: 
4 out of 5
4 out of 5
cheap works well
27 Sep 2012
By watermans
, bournemouth
"used a few times now with no problem at half the price as other brands"
Review 8 for No Nonsense Central Heating Inhibitor 500ml
Overall Rating: 
5 out of 5
5 out of 5
Value: 
5 out of 5
5 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
5 out of 5
5 out of 5
Would you recommend this product? Yes
Overall Rating: 
5 out of 5
5 out of 5
Value: 
5 out of 5
5 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
5 out of 5
5 out of 5
The name says it all
21 Aug 2012
By bigjeeze
, Bournemouth
"This porduct i perfect for the job - simple to use and a great price. Excellent service from Screwfix as always."
Review 9 for No Nonsense Central Heating Inhibitor 500ml
Overall Rating: 
5 out of 5
5 out of 5
Value: 
5 out of 5
5 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
4 out of 5
4 out of 5
Reliability: 
4 out of 5
4 out of 5
Would you recommend this product? Yes
Overall Rating: 
5 out of 5
5 out of 5
Value: 
5 out of 5
5 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
4 out of 5
4 out of 5
Reliability: 
4 out of 5
4 out of 5
Good stuff but is there enough
6 Aug 2012
By Quickfix
, Kent
"Whilst we have a water softener one would think that the inhibitor would be belt and braces. However, it was interesting to read the instructions. If you have an ion exchange softener i.e. one that uses salt, then you should use double the quantity of inhibitor. One bottle usually being enough for a system with 8-10 radiators. So buy two bottles if you have a softener!"
2 of 2 people found this review helpful.
Review 10 for No Nonsense Central Heating Inhibitor 500ml
Overall Rating: 
5 out of 5
5 out of 5
Value: 
5 out of 5
5 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
4 out of 5
4 out of 5
Reliability: 
5 out of 5
5 out of 5
Would you recommend this product? Yes
Overall Rating: 
5 out of 5
5 out of 5
Value: 
5 out of 5
5 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
4 out of 5
4 out of 5
Reliability: 
5 out of 5
5 out of 5
Good Value inhibitor
2 Jul 2012
By silverstar
, Melton Mowbray
"After thoroughly cleaning and flushing my entire system of 30 years of black mess I wanted to add some protection to the system so added 2x bottles of this. IT seems as good as any....only time will tell how well it performs."
Review 11 for No Nonsense Central Heating Inhibitor 500ml
Overall Rating: 
5 out of 5
5 out of 5
Value: 
4 out of 5
4 out of 5
Features: 
4 out of 5
4 out of 5
Performance: 
4 out of 5
4 out of 5
Reliability: 
5 out of 5
5 out of 5
Would you recommend this product? Yes
Overall Rating: 
5 out of 5
5 out of 5
Value: 
4 out of 5
4 out of 5
Features: 
4 out of 5
4 out of 5
Performance: 
4 out of 5
4 out of 5
Reliability: 
5 out of 5
5 out of 5
radiator cleaner
14 May 2012
By brennyn
, wales
"fantastic did the job i wanted it to do very easy to use"
Review 12 for No Nonsense Central Heating Inhibitor 500ml
Overall Rating: 
5 out of 5
5 out of 5
Value: 
5 out of 5
5 out of 5
Features: 
4 out of 5
4 out of 5
Performance: 
4 out of 5
4 out of 5
Reliability: 
4 out of 5
4 out of 5
Would you recommend this product? Yes
Overall Rating: 
5 out of 5
5 out of 5
Value: 
5 out of 5
5 out of 5
Features: 
4 out of 5
4 out of 5
Performance: 
4 out of 5
4 out of 5
Reliability: 
4 out of 5
4 out of 5
Does what it says on the tin
8 Mar 2012
By CyclingMole
, Epsom
"Why pay more, thuis is a quality product, used this for years and never had a problem"
Review 13 for No Nonsense Central Heating Inhibitor 500ml
Overall Rating: 
5 out of 5
5 out of 5
Value: 
5 out of 5
5 out of 5
Features: 
4 out of 5
4 out of 5
Performance: 
4 out of 5
4 out of 5
Reliability: 
4 out of 5
4 out of 5
Would you recommend this product? Yes
Overall Rating: 
5 out of 5
5 out of 5
Value: 
5 out of 5
5 out of 5
Features: 
4 out of 5
4 out of 5
Performance: 
4 out of 5
4 out of 5
Reliability: 
4 out of 5
4 out of 5
Easy Peasy Inhibitor
9 Nov 2011
By LeonUmk
, Milton Keynes
"Central heating inhibitor is a must to prevent corrosion and limescale build up. It is especially important if your system has not been treated before, or not in a long time.
After flushing the system (of the BLACK water) it was very easy to add the inhibitor. Just pour it into the heatings expansion tank, and it gets straight into the system.
Very good value as inhibitors go.
"
Review 14 for No Nonsense Central Heating Inhibitor 500ml
Overall Rating: 
5 out of 5
5 out of 5
Value: 
5 out of 5
5 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
5 out of 5
5 out of 5
Would you recommend this product? Yes
Overall Rating: 
5 out of 5
5 out of 5
Value: 
5 out of 5
5 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
5 out of 5
5 out of 5
Great product
6 Oct 2011
By Jennasda
, Lanarkshire
"This heating inhibitor is as good as better known brands and at less than half the price.
Buy it !
"
Review 15 for No Nonsense Central Heating Inhibitor 500ml
Overall Rating: 
5 out of 5
5 out of 5
Value: 
5 out of 5
5 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
5 out of 5
5 out of 5
Would you recommend this product? Yes
Overall Rating: 
5 out of 5
5 out of 5
Value: 
5 out of 5
5 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
5 out of 5
5 out of 5
Does its job
7 Jul 2011
By Sys3
, Alloa, Scotland
"I always use this when fitting towel rads and its good value."
Review 16 for No Nonsense Central Heating Inhibitor 500ml
Overall Rating: 
5 out of 5
5 out of 5
Value: 
5 out of 5
5 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
5 out of 5
5 out of 5
Would you recommend this product? Yes
Overall Rating: 
5 out of 5
5 out of 5
Value: 
5 out of 5
5 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
5 out of 5
5 out of 5
great product great price
28 Mar 2011
By bpu01
, Warwickshire
"Had some dogy builders in last year at my mothers house. To do their work they took the rads off. When work was completed the heating system didnt work. Called a plumber who said that the sytem needed refilling. He refilled it but didnt use any inhibitor. In time the system has got noisy. Used this product about three weeks ago and it seems to have got rid of the noise. Easy to use inhibitor used with the filling kit. The price is good. Seems to do the job that the more expensive products also claim. Would defantly use again at these such low prices."
1 of 1 people found this review helpful.
Review 17 for No Nonsense Central Heating Inhibitor 500ml
Overall Rating: 
5 out of 5
5 out of 5
Value: 
5 out of 5
5 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
5 out of 5
5 out of 5
Would you recommend this product? Yes
Overall Rating: 
5 out of 5
5 out of 5
Value: 
5 out of 5
5 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
5 out of 5
5 out of 5
Inhibitor
3 Jan 2011
By akm3434
, Telscombe Cliffs
"Used this again and not for the first time and appears to work well. Dosage is a minimum of 500ml per 100 litre installation system capacity. The system capacity may be difficult to determin accuratly without measuring the flow input into new systems, and impossible for as installed systems so you will have to make some assumptions and calculations based upon experience and an assessment. On the bottle is states "treats up to 10 Rads" but this is surely dependant upon the concentration, installation size and so on. Would be a good idea to sell this in a volume suitable for a typical installation and state what this is."
2 of 2 people found this review helpful.
Review 18 for No Nonsense Central Heating Inhibitor 500ml
Overall Rating: 
5 out of 5
5 out of 5
Value: 
5 out of 5
5 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
5 out of 5
5 out of 5
Would you recommend this product? Yes
Overall Rating: 
5 out of 5
5 out of 5
Value: 
5 out of 5
5 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
5 out of 5
5 out of 5
Good value for money
26 Nov 2010
By AaronTheGasman
, Bedfordshire
"For the price this inhibitor offers great value for money compared to its competitors. Don't let the label put you off!"
Review 19 for No Nonsense Central Heating Inhibitor 500ml
Overall Rating: 
5 out of 5
5 out of 5
Value: 
5 out of 5
5 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
5 out of 5
5 out of 5
Would you recommend this product? Yes
Overall Rating: 
5 out of 5
5 out of 5
Value: 
5 out of 5
5 out of 5
Features: 
5 out of 5
5 out of 5
Performance: 
5 out of 5
5 out of 5
Reliability: 
5 out of 5
5 out of 5
No Nonsense is no nnsense
29 Dec 2009
By ChristhePlumber
, Exmouth
"With a large variety of products on the market at varying prices, I find this product good value for money, whilst doing exactly what it says on the bottle. Highly recommended for the longevity of your central heating system, and to maintain efficiency."
7 of 8 people found this review helpful.
Review 20 for No Nonsense Central Heating Inhibitor 500ml
Overall Rating: 
4 out of 5
4 out of 5
Value: 
4 out of 5
4 out of 5
Features: 
4 out of 5
4 out of 5
Performance: 
4 out of 5
4 out of 5
Reliability: 
4 out of 5
4 out of 5
Would you recommend this product? Yes
Overall Rating: 
4 out of 5
4 out of 5
Value: 
4 out of 5
4 out of 5
Features: 
4 out of 5
4 out of 5
Performance: 
4 out of 5
4 out of 5
Reliability: 
4 out of 5
4 out of 5
So far so good.
16 Nov 2013
By MANGO3
, Southampton
"I have only just used this product, time will tell, when I next drain the system, to replace more radiators."
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