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Instructions for Replacing FIL/SC-REF16 | FIL/SC-REF32 whole house anti-scale media

Product Codes: FIL/SC-REF16 | FIL/SC-REF32


Thank you for your purchase and for choosing the greener option for replacing your media

How to Replace Your Media/Powder

Turn off the water supply.

Take a bucket and place it under the filter housing to catch any water spillage.

Then press the red or black button on top of the housing unit (if you have one) to release pressure.  Otherwise open up the cold water kitchen tap.

Remove the bottom housing from the head (Lefty loosey / righty tighty!)

Remove the cartridge and open it Green topped “SC” coded Scale Centurion cartridges are a quarter turn twist / pull off)

White “FIL” coded cartridges are either as above or have a jam jar type lid at the bottom which unscrews

Discard the old media. (The water filter black media can go on flower beds etc - but not on compost. The old Scale Centurion should be put in the bin - it cannot be recycled).

Rinse out the cartridge casing with cold soapy water and wash the rubber washer on top of the cartridge casing in warm soapy water - to remove any residue. Then rinse.

Carefully pour the new media into the cartridge casings.

CAUTION: With the water filter / white cartridge you will get a very fine carbon dust in the air. This will be minimal but if you’re very asthmatic you may choose to do the pouring outside.

Media / Powder Quantities

To make one FIL16 use TWO bags of FIL-REF
To make one
SC16 use ONE bag of SC-REF
To make one FIL32 use FOUR bags of FIL-REF

To make one SC32 use TWO bags of SC-REF 

Do Not Overfill

Both types of media / powder have been carefully measured.

- White FIL cartridges / black powder: There should be a GAP / SPACE of at least 3 inches between the black powder and the top of the cartridge. This is because the powder slowly expands when wet. 

- With the Scale Centurion / white powder . The cartridge should be less than a third full. This expands in the water.


Re-Insert Cartridges

When done, close and put back the cartridges into the housing unit.

Position top and bottom correctly ie carefully guide the top of the cartridge up into the centering slot making sure you guide it  carefully past any centralising prongs.

Close housing unit.

Once you are sure the cartridge is seated correctly inside the housing, tighten it by hand, then use the wrench to tighten it reasonably - don’t overtighten.

Optionally, before closing put some Vaseline around the large black rubber orings to lubricate them. You can also dab some on the screw threads to make it easier to open next time (but do not put Vaseline on the cartridges).

Note re Blue Head / White Bottom style Housings: A fully closed housing has a gap of 2mm to 3mm max between the lower blue nut and the blue top. You can get fairly close to this gap screwing it by hand. Then use the wrench to give it a final tightening. BUT if you need to use a lot of force with the wrench to achieve that 2mm / 3mm then there is a problem. If so check the internal cartridge is inserted correctly.

Note re Black Head / Blue bottom style Housings: When closing the housing up, watch out for the prongs / guides under the black header unit. A  loose cartridge might mis-align and be damaged / pierced by them.

When closed turn the water supply back on. (If you have a bypass valve make sure it is turned back on).

Open up your cold water taps for 5 minutes and flush toilets to let any trapped air escape.

The water may look cloudy for a while but will settle down. 

Any Problems? Please Telephone 020 8761 6611

Important Note re Reminders

To avoid long term bacteria build-up it is important to change or disconnect your water filter cartridges on time.

We will email you reminders when it's time to change, but please make sure you whitelist our email address so these reminders aren't sent to spam.

And/ or set an alarm now on your mobile or use Siri etc

Please note your feedback and any suggestions as to how we can improve our service are always appreciated.


Thank you

Sales Admin Team
Telephone 020 8761 6611

Water Filter instructions / Guides for fitting and installing


Need advice?
Please call us on
020 8761 6611


UK Water Filters Ltd
Unit D120
Parkhall Industrial Centre
SE21 8DE

UK Water Filters Ltd a Company Limited by Guarantee,
Registered in England,
Company Number: 05249436,
VAT Reg. No. 863 7634 91


Questions? Call us for friendly advice
+44 (0) 20 8761 6611




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