Skip to content
Need Help
Screwfix Logo
Activating the button will move focus to the expanded search input field
StoresSelect a store
Checkout
CLICK & COLLECT in as little as 1 minute
CLICK & COLLECT in as little as 1 minuteNEXT DAY DELIVERY AVAILABLE 7 days per week887 Stores Nationwide find your local store60 Minute Delivery with Sprint
DEWALT POWER WEEK! SHOP NOW

Fernox F1 Protector Central Heating Inhibitor 500ml (342PP)

Product rating 5 stars out of 5
Product rating 5 stars out of 5
 
Fernox F1 Protector Central Heating Inhibitor 500ml
Latest Offers
  • 1 Year Guarantee
Save21%
£14.99Inc Vat
Was £18.99

Fernox F4 Central Heating Leak Sealer 500ml (766PP)

Product rating 4.7 stars out of 5
Product rating 4.7 stars out of 5
 
Fernox F4 Central Heating Leak Sealer 500ml
Latest Offers
  • 1 Year Guarantee
  • Fixes System Pressure Loss Quickly
  • Concentrated Fast-Acting Formula
Save10%
£14.29Inc Vat
Was £15.99

Fernox F3 Central Heating Cleaner 500ml (757PP)

Product rating 4.4 stars out of 5
Product rating 4.4 stars out of 5
 
Fernox F3 Central Heating Cleaner 500ml
Latest Offers
  • Treats 130 Litres
  • Neutral pH
  • Non-Hazardous & Non-Foaming
Save20%
£14.29Inc Vat
Was £17.99