Central Heating Cleanser / Descaler & Inhibitor

By Calmag Product code: 45091 Pack size: Each

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Product Details

3 in 1 system protector. Dissolves contaminants to a minute size and floats in the system. Provides long term protection. Easy to use and add when cleaning is not appropriate.

Technical Specification
Brand Calmag
Safety Data Sheet click here
Safety Data Sheet click here
Delivery details

Covid-19 Update

  • Free Next Business Day delivery for orders over £25 to home and site is available for orders placed before 6pm
  • Saturday and Sunday delivery is now available for orders placed before 4pm on Friday for Saturday delivery and 4pm Saturday for Sunday delivery, see here for details
  • Pre-12 delivery service is now available. Place your order before 6pm Mon – Fri for next business day delivery by 12pm. Orders placed after 6pm Friday and before 6pm Sunday will be delivered by 12pm Monday. UK mainland
  • Once your order has been dispatched you will receive an invoice email with the courier details and your tracking number
  • Alternatively go to MyAccount, click on your Order History, click on the TRACK icon to link through to the carrier website and the tracking details for your delivery
  • Delivery direct from suppliers is now available and specific delivery times will be displayed on the product page
Order Value: Under £25 Over £25 but less than £75 £75 & Over
Next Business Day Delivery (Mon-Fri) usually before 6pm £5 Free Free
Pre-12 Delivery before 12 noon Next Business Day £10 £5 £5
Remote areas standard delivery (2-4 days) £5 Free Free
Saturday Delivery order by 4pm Friday £10 £5 Free
Sunday Delivery order by 4pm Saturday £10 £5 Free

Please note items delivered by our suppliers are not available for the options above. Delivery times may vary.

More about Delivery & Returns
Click & Collect details

Covid 19 Update

Click & Collect

  • Branches are now fully open and operating safely in line with government guidelines
  • Safe contactless collection is available 7 days a week at our branches
  • Our branches are open 7am-8pm Monday-Friday, 7am-7pm Saturday and 9-4pm Sunday
  • Keeping our colleagues and customers safe and well and respecting stringent social distancing requirements is our number one priority – 2 metre rule enforced
  • Our available product range will not require more than 1 person to lift
  • Please see our guide to click and collect below

  • Please ensure that your mobile number is added so that we can text you when your order is ready to collect

Call & Collect

Due to current trading conditions we have suspended our Call & Collect service until further notice.

If you are using our Click & Collect service please note the following:
  • Order online or over the phone and collect in branch from 5 minutes later.
  • Ensure you check stock is available for collection at your chosen branch.
  • Check branch opening hours to ensure you have sufficient time to collect.
  • For items not available for same day collection, place order before 7pm Mon-Fri (4pm Sun) and you can collect Next Business Day (Mon-Fri) after 3pm.
  • If we have your mobile number, we’ll send you a text when your order is ready to collect.
Central Heating Cleanser / Descaler & Inhibitor is rated 4.9 out of 5 by 62.
Rated 5 out of 5 by from Cleared blockage in microbore piping I bought this several months ago because the loft room radiator was getting airlocks during the winter so that only the bottom part of the rad was hot. Rad had to be repeatedly bled to release the gas, so not a permanent solution. About a month ago, during the warm weather, I drained the system and flushed through a few times. However, on refilling after the pemultimate flush and testing I found that the ground floor radiators were cold, only the upper floor rads being hot. I suspected that during draining, debris had blocked the 8mm dia microbore piping somewhere. Panic stricken, I toyed with various ideas - using heavy duty cleaners, backflushing using high pressure mains water, etc. Then I thought why not put in this product Cal Chem 3in1 to see if it would free up the blockage? AND IT DID! All radiators became hot. I now have to wait and see how the system will perform during the winter and whether it will cure the original malady, gas lock of the loft room radiator. But after seing it clear the blockage of the microbore pipe I remain optimistic.
Date published: 2020-08-31
Rated 5 out of 5 by from Great stuff!! Bought this last year as advised by our Boiler service engineer, well, it must have worked, as we had none of the usual racket of bubbling and swooshing clatter when the radiators came on... ALL WINTER!! Can only be good for the heating system, would recommend.
Date published: 2020-07-14
Rated 5 out of 5 by from Does It All In One Bottle I've been using this product for six years or so. I used to use Fernox, but a few years back only large containers could be bought and it had gotten pricey. I looked around and found Calchem. Spoke to their technical dept, liked their honesty, knowledge and the abilities/spec of the product and the value for money price. So I was delighted when Toolstation started to stock it.
Date published: 2020-07-07
Rated 4 out of 5 by from Easy install Just went in the roof space lifted the tank lagging and poured the product in,no full or partial drain down required, hopefully over the next year the magnaclean do it’s job as well
Date published: 2020-06-22
Rated 5 out of 5 by from Great stuff Got this after great reviews
Date published: 2020-06-11
Rated 5 out of 5 by from 3 in 1 great stuff great value 3 in 1 works a treat no need to buy 3 separate additives great price too good quality
Date published: 2020-06-01
Rated 5 out of 5 by from Less boiler issues. Great value and it stays in the system.
Date published: 2020-05-26
Rated 5 out of 5 by from Easy to use, works straight away Really easy to use, and starts working quickly (added to header tank and left overnight). Next morning the timed start was quieter, and continues to get better as time goes on. You can dose the radiators directly, and you can just leave it in the system, no flushing.
Date published: 2020-05-08
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