Re: To Descale Boiler or not?
Posted by: Donald Cook
Date: January 17, 2019 04:11PM
Hi Mike, If you search for my thread from 2010 titled “leaking boiler tubes” you will see why I first used the Fernox DS-3. I also use TSP (Trisodium Phosphate) added to the feed water & check its ph daily.
Here is some info for you:-
Limescale Remover DS-3 2Kg Product Code: 61027, 24066
Using sulphamic acid, this powerful but environmentally friendly product is ideal for use to remove baked-on limescale deposits from domestic appliances and boiler heat exchangers. Designed with the consumer in mind, the product is safe and easy to use; after each application the product changes colour to indicate when DS-3 is exhausted and ready for disposal to foul drain.
• Restores efficiency to all types of water heater
• Powerful acid limescale remover, dissolves up to 50% of its own weight of limescale
• Corrosion inhibited
• Colour change indicated when exhausted
• Safe to apply and easy to use
• Belgaqua approved product
Application and Dosage
Fernox DS-3 should first be dissolved in hot water at the maximum concentration of 1 kg per 10 litres of water (10%) with a minimum in-use concentration of 250g per 10 litres of water (2.5%). Hot water will accelerate de-scaling but do not exceed 80°C. The de-scaling process will release carbon dioxide gas (CO-2), which can cause foaming. Hence, space should be allowed for this before commencing work. A colour change from yellow, through green, to blue indicates the de-scaling power is exhausted. However, the major part of the solution’s effort is expended when green is reached and if cold the final change to blue can take a long time. When de-scaling is complete, drain and rinse several times until no traces or odours remain. DS-3 can be neutralised with Fernox System Neutraliser.
Fernox DS-3 contains Sulphamic acid with inhibitors, indicators and non-foaming surfactants.
pH: 2.0 at 1% w/w in water
Fernox DS-3 is supplied in 2kg and 30kg containers.