DIY or Trade Professional:Even if you have a small amount of plumbing knowledge, there’s a good chance you’ll be able to fix a large amount of regular plumbing problems that plague the house. However, you will of course need the correct tools for the job and this is where the cost comes in. You might find that hiring a trade professional to do the one job is of a similar price as the required tools. But this is where you need to make a judgement call and work out whether it’s worth investing in the tools which will allow you complete future jobs that crop up or if you want a one-off fix. For those that have a good amount of DIY common sense and some plumbing experience, it will likely be better to invest in some tools to save yourself a lot of money over time. DIY is also a convenient option as plumbers can be scarce or hard to find in times of need... Fernox DS-3 is used for removing limescale from any type of water heater to restore its efficiency. It is safe to use with steel, stainless steel, cast iron, copper, brass, PVC, ABS rubber polythene and most plastic pipework. Using sulphamic acid, Limescale Remover DS-3 is a powerful but environmentally friendly product which 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.