Is this any good removing limescale in a hot water cylinder

Yes I have used this on an indirect hot water storage cylinder in fact there are instructions in side how to do this. The illustration of a hot water cylinder on the outside of the tub is what drew my attention. However what I did was turn off cold water supply to cold water header tank in loft then drained hot water storage cylinder enough to allow removal of emersion heater, the added weight of the water inside the cylinder helps with the removal of the immersion, then drained hot water cylinder enough to allow coverage of internal coil and added lime scale remover this I found allows a stronger solution to be added and allows you to monitor progress once de-scaled flush system thoroughly and re-assemble. Hope this helps.

Can this be used in central heating system

No, you need one specifically for central heating. This is for taps/ kettles etc

Can this be used to clear a blocked cold water pipe?

If the blockage is scale related then potentially yes - it could take some time and it may be easier and cheaper to cut and replace the blocked section. If it used then a full flush to ensure the chemical has completely gone out of the system will be required after the blockage has cleared - especially if potable/drinking water supply as the product is harmful to humans and environment if not used correctly and safely.

Fernox DS-3 How do you add it to hot water system?

Why would you do that? It then means you will have descaler coming out of your hot taps in the house. It won't make for a very nice bath. I use it to descale kettles etc. Use a tablespoon in half a kettle of water, boil and rinse several times before using.

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DS-3 LIMESCALE Remover 2KG

Product ID: 51753756

Details

Brand
Fernox
Contains liquid contents
No
Item form
Granule
Item volume
2 Kilograms
Item weight
2 Kilograms
Number of items
1

💧Non-foaming surfactants

⚙️2kg powerful granules

🛡️Sulphamic acid with inhibitors

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Description

⚡ Power up your appliances with spotless efficiency!

ECO CONSCIOUS POWER - Powerful yet mindful formula with long-lasting aquatic safety considerations
NON FOAMING FORMULA - Ensures smooth application without messy bubbles or residue
ALUMINIUM SAFE CLEANING - Specially designed to protect delicate surfaces while dissolving tough scale
HEAVY DUTY 2 KG GRANULES - Bulk pack designed for multiple deep cleans, saving time and money
PRECISION LIMESCALE REMOVAL - Formulated with sulphamic acid and inhibitors for effective, safe descaling

FERNOX DS-3 Limescale Remover is a 2kg pack of potent granules formulated with sulphamic acid, inhibitors, and non-foaming surfactants. Designed for domestic appliances, it effectively dissolves limescale while being safe on aluminium surfaces. Trusted by professionals and rated 4.5 stars, this product delivers powerful, bulk descaling with eco-conscious ingredients.

Specifications

ASIN	B006UI4HC8
ASIN	B006UI4HC8
Best Sellers Rank	37,136 in Grocery ( See Top 100 in Grocery ) 289 in De-Scalers
Brand Name	Fernox
Contains Liquid Contents?	No
Customer Reviews	4.5 4.5 out of 5 stars (65)
Customer reviews	4.5 4.5 out of 5 stars (65)
Delivery information	We cannot deliver certain products outside mainland UK ( Details ). We will only be able to confirm if this product can be delivered to your chosen address when you enter your delivery address at checkout.
Guaranteed software updates until	unknown
Item Form	Granule
Item Volume	2 Kilograms
Item Weight	2 Kilograms
Item model number	DS-3
Manufacturer	FERNOX
Manufacturer	FERNOX
Model Number	DS-3
Number of Items	1
Package Dimensions	20.5 x 20.2 x 10.4 cm; 2 kg
Part Number	DS-3
Size	2 kg (Pack of 1)
Special Features	Removes limescale
Specific Uses For Product	Dissolving scale, Limescale remover
Surface Recommendation	Aluminium
Unit Count	2000.0 gram

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B/.227

Duties & taxes included

In stock

Sold byAmazon PanamaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Panama.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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Excellent communication throughout the order process. Product is perfect.

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