Fernox DS40 System Cleaner 1.9kg - 61102

Fernox DS40 System Cleaner 1.9kg - 61102

7 reviews

£32.38 (Inc. VAT)

In Stock


Plumbworld has the lowest price for this product!


The DS40 from Fernox is a fast-acting cleaner for removing limescale, magnetite (sludge) and other material deposits which may have collected from your central heating system.

Ideal for use with powerflushing units for extra efficiency and rapid cleaning.

It can also be used to descale a boiler separately.

Features and Benefits:

  • Removes limescale, black sludge and other deposits rapidly.
  • Heating efficiency can be improved and circulation restored.
  • Suitable for use with all mixed metal systems.
  • The free-flowing nature of the powder makes use with powerflushing units a breeze.
  • Supplied with neutraliser sachets.
  • 1.9kg box
CE Approved


Fernox DS40 System Cleaner 1.9kg - 61102

£ 32.38 (Inc. VAT)

Stock status: In Stock
Order in next for delivery on Thursday - 02/12/2021
Interest Free in 4 Easy Payments

Pay £8.09 every two weeks with

Final credit amount & repayments subject to Zip terms & conditions. Maximum spend £1000.

Parcel Shipping - Free

Delivery to your home, 6 days a week with a next-day option for orders placed before 3:00pm.

All our parcel deliveries are FREE

365 Day Returns

Returns Policy - Changed Your Mind?

If you change your mind about the product when you receive it you can notify us any time within 365 days and return it for a full refund at your own cost. Any refunds will be made within 30 days of receiving your returned item. You are expected to cover the cost to return the item and your initial delivery charge will not be refunded.

More details here

Lowest Price Guaranteed
Plumbworld £32.38
Plumb2u £34.29
Bathrooms and Showers Direct £34.35
Cleeve Supplies £38.22
Mr Central Heating £43.03
bes.co.uk £53.74

Prices last checked on 30/11/2021
All prices are inc VAT and include delivery charges

Price Guaranteed For

7 Product Reviews

  • Rob Miles
    5/ 5

    Bought this after a call to Fernox (very helpful) to sort out a heavily sludged system. The system had been cleaned with a number of other cleaners and the system water was running reasonably clear but the flow was poor. Its a 3 story /13 rad set up so I used 2 packs. Drained after 24 hours and the best description of what came out is pea soup. Made a massive difference, shifted kilos of muck and took 3 hours of flushing to run clear. System flow is transformed. This stuff really works.

  • Graham Rose
    5/ 5

    Have used this product before with excellent results. now my 12 old boilers is getting a bit noisy with the occasional banging so I will do a complete clean when the weather gets a bit warmer. My neighbour who had the same aged boiler has just had his replaced as his plumber said it's not worth cleaning older boilers. We shall see!

  • Robert Williams
    5/ 5

    Best price and very rapid delivery from Plumbworld. Resurrected my old system without powerflushing ... big cost saving ... marvellous.

  • Stephen Lithgow
    5/ 5

    An excellent product. It was delivered on time and did a great job unblocking a radiator pipe.

  • paul hancock
    4/ 5

    I got this to clean out an old system. Tried one pack and within 20 minutes the red colour changed to yellow indicating that it was exhausted. Did a flush and the water ran for about 2 hours with black particles in before it went clear. Radiators are much better now but I think it needs another dose as the cleaning action only lasted for 20 minutes

  • Graeme Smith
    4/ 5

    We used this to clean out my 25 year of heating system- it worked well except for one old pipe that was beyond repair and has to be cut out, worked really well though.

  • Richard. Lathbury
    4/ 5

    did exactly as quoted on the box. at a very good price. cleaned system well. good product.