Fernox F1 Central Heating Inhibitor & Protector 265ml

By Fernox Product code: 27260 Pack size: Each

£9.18 Exc. VAT £7.65

Product Details

Provides long term protection against corrosion and limescale formation in domestic central heating systems.

Inhibitor which prevents corrosion and limescale formation in central heating systems. Includes enhanced pH buffering to ensure the system water pH level does not drop below 6.5 or above 8.5 - the optimum pH range for preventing corrosion and limescale build-up. In line with BS 7953:2019 regulations and best practice, and for long-term protection of the system, concentration levels should be maintained and checked annually as part of the boiler or system service. Compatible with all other Fernox products and is suitable for use with all materials and metals used in central heating systems, including aluminium.

• Stops corrosion and scale to extend system life and efficiency
• Use in mixed metal heating systems, including aluminium
• High performance pH buffering for optimum system pH control
• Prevents radiator cold spots, sticking pumps and boiler noise
• Treats an average sized UK home of up to 100L, 12 radiators and 190 sqm of underfloor heating. Smaller volume product – less packaging waste and lower environmental impact
• Can be conveniently dosed via any Fernox TF1 Filter

Technical Specification
Brand Fernox
Manufacturer ID 62454
Safety Data Sheet click here
Delivery details

DELIVERY OPTIONS (UK mainland only)

Next Day Delivery – £5.00 or FREE for orders over £25

  • Order before 7pm Monday to Thursday for next business day delivery
  • Order Friday to Sunday before 5pm for Monday delivery
  • Orders placed after Sunday at 5pm will be delivered the following Tuesday

Pre-12pm Delivery – £10.00 or £5.00 for orders over £25, to arrive before 12pm on the scheduled days above

Saturday Delivery – £10.00 or £5.00 for orders over £25 & FREE for orders over £75 (order by 6pm Friday)

Sunday delivery – £10.00 or £5.00 for orders over £25 & FREE for orders over £75 (order by 4pm Saturday)

Times may vary for items being delivered directly from the supplier. For more information, please visit our delivery information page below.

Items over 30kg can only be delivered from Monday to Friday. If ordered before 6pm, please allow up to two business days for delivery. Orders placed after 6pm Thursday will be delivered after the weekend.

More about Delivery
Click & Collect details

Collection Details

Our opening times are 7am-8pm Monday-Friday, 7am-7pm Saturday and 9-4pm Sunday. Please check your local branch is open on the branch locator page, before you visit.

Once you have placed your order online, we’ll have it ready for you at the branch you have selected in as little as 5 minutes. We will hold your order for 14 days, after which we will automatically generate a refund to the payment type you used to place the order.

Don’t forget your mobile number – Make sure your mobile number is added so that we can text you when your order is ready to collect. Please wait for your text or email before coming to collect your items.

If an item is eligible for Next Business Day Collection in branch, the order must be placed by 7pm Monday to Thursday for collection the next day. Orders placed after 7pm on Thursday, and up to 5pm on Sunday, will be available for collection on Monday. For larger items over 30kg, please allow two business days.

Fernox F1 Central Heating Inhibitor & Protector 265ml is rated 4.8 out of 5 by 71.
Rated 5 out of 5 by from Nice size to treat whole system Easily added after draining a bit out of a radiator, used the Flo masta filling tube screwed into the radiator blanking plug
Date published: 2022-05-23
Rated 4 out of 5 by from Good product but connection problems 4 stars given as i needed a ½" bsp to ¾" bsp adptor to connect to the filling loop.
Date published: 2022-05-07
Rated 5 out of 5 by from F1 does good as evidenced Having drained down existing system with F1 in water it seemed to have kept water rust free. So refilling with same seemed a sensible action. My system is closed with expansion tank so can be tricky overcoming non return valve in filling loop. Solution was to remove nrv temporarily then refit.
Date published: 2022-04-26
Rated 5 out of 5 by from Quality Quality inhibitor used b4 about 5yrs ago quality stuff
Date published: 2022-04-26
Rated 5 out of 5 by from Central heating liquid Added to the radiator when fitted.
Date published: 2022-04-22
Rated 5 out of 5 by from Fernox F1 Recommended to use this protector by my local plumber who serviced my gas boiler. It was easy to put into my system.
Date published: 2022-03-30
Rated 4 out of 5 by from Easy to use I don’t know how effective this is as a product but it is very easy to “inject” into the heating system. Wish I had discovered it before now.
Date published: 2022-03-20
Rated 5 out of 5 by from Worth the extra Easy to squirt into a radiator use as long as you can shut down both ends of a radiator, several of my thermostatic valves could not be shut down completely but I did find 1 radiator I could use. Quick and easy to insert through the bleed valve just follow the instructions. Has quietened down our system, and no adding to the tank and the drawing off water from the system to get the stuff circulating. Would buy again, well worth the extra cost
Date published: 2021-12-21
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