0500 41 41 41
Cookie Reports - Screwfix Cookie Policy

No Nonsense

No Nonsense Central Heating Inhibitor 500ml

Product Code: 46974

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

View more information

Download more information...

Safety Data Sheet (COSHH)




Add to saved list

Available for deliveryNext Day Delivery
Available for collection from store Store Collection Check stock in your store
Page 1 of 4
Page 1 of 4
Rated 5 out of 5 by No Nonsense Inhibitor Come on the name says it all - does it work who knows I’m not going to get the chemistry set out to check it - I’ll just hope for the best for this price it's worth the gamble. 2 Oct 2015
Rated 5 out of 5 by No Nonsense Review Easy to use - Just drain system added to tank and refill - No Nonsense and great value 28 Sep 2015
Rated 5 out of 5 by Good product Good economic product with good performance and easy to use 26 Sep 2015
Rated 5 out of 5 by Great product for the price Great product for a great price. Does the job, used lots of times without any issues. 25 Sep 2015
  • 2015-10-05T16:41:57.109-05:00
  • bvseo_lps, prod_bvrr, vn_prr_5.6
  • cp-1, bvpage1
  • co_hasreviews, tv_77, tr_77
  • loc_en_US, sid_46974, prod, sort_default
Page : 2 3 4 next>
2 Questions  2 Answers

Screwfix Q&A

Ask your questions. Share your answers.

« Back
Sort by:
3 Sep 2015
Customer avatar
Read all my Q&A
0out of 0found this question helpful.
Was this helpful?Yes0No0


In an open vented system with feed and expansion tank 100L represents about 10 radiators.

In a sealed system 10 radiators would probably have a system volume of 70-80L because the feed and expansion tank has been eliminated.

On that basis a sealed system of capacity 100L would likely consist of 12 radiators.

It's always better to overdose than under dose.

And it's always best to err on the side of caution.

So for every 10 radiators (count doubles as two) add one bottle. For example in an 18 radiator system add two whole bottles.
5 Sep 2015
6of 6found this answer helpful.
Was this helpful?Yes6No0
25 Aug 2015
Customer avatar
, Other Trade
0out of 0found this question helpful.
Was this helpful?Yes0No0


Strictly speaking according to BS7593 it is not advisable to mix inhibitors from different brands - drain down, refill and start again with No Nonsense. All the variants (inhibitor, inhibitor concentrate and inhibited antifreeze) are compatible and can be mixed. If there is a small amount of a leading brand in the system we have not encountered any incompatibility issues. If in doubt please call our helpline on 0845 880 60 50 for a more detailed explanation.
26 Aug 2015
2of 2found this answer helpful.
Was this helpful?Yes2No0
1 of 1
  • 2015-10-05T16:38:32.336-05:00
  • bvseo_lps, prod_bvqa, vn_prr_5.6
  • cp-1, bvpage1
  • co_hasquestionsanswers
  • loc_en_US, sid_46974, prod, sort_default
1 of 1


Download more info (pdf)

Brand No Nonsense
Pack Size 1
Product Type Central Heating Inhibitor
Sealant Adhesive Volume 500 ml
Total Product Weight 0.55 kg
Volume 500 ml