Please update the quantity before checking out your order.
Only 4 products can be compared at a time
Please un-tick any additional selected products before comparing items.
Fernox Cleaner | Central Heating Treatments | Screwfix.comOur range of boiler descaler, sludge remover and central heating cleaner from Fernox, Sentinel and No Nonsense helps keep your boiler working when you need it most - keeping you warm through the winter. | 1000's of products available in-store and online at low trade prices | FREE next day delivery available | FREE collection in 5 minutes | FREE Returns
We've noticed that you have cookies disabled. Screwfix.com requires cookies to be enabled in order to work properly - find out how to enable cookies. If you'd prefer not to enable cookies you will be able to view products but won't be able to purchase. Remember you can shop with us on the phone on 0500 414141 (mobile friendly 03330 112 112) or at over 280 stores.