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Instructions for Installing Your Pre Filter Housing Unit - Heavy Metals Removal

Product Codes:  BB-HM-20/LD

Fitting a by-pass valve is highly recommended so that the unit can be isolated for cartridge changing or to prolong the life of the filter when not required.

If fitting outside the property insulate the system to avoid frost damage. (The unit should not freeze).

Insist that your plumber fits a Pressure Reducing Valve (PRV) to protect the unit from unexpected water pressure increase.

This is rare but does happen - owing to overnight water utility works etc - and can result in failure / possible flooding. A good one is a Watts 2282500 which costs about £12

Notes for the Plumber

Please read the customer information above.

A bypass valve should be installed on every system to facilitate installation and service.

Fit a Pressure Reducing Valve (PRV) to protect the unit from unexpected water pressure increase

The water enters the filter on the left hand side.

The filter ports are 22mm.

System must be operated in a vertical position. Do not lay it down during operation. The system may be placed in any position for shipping and installation but must be operated in the vertical position.

Make sure the system is level.


Please ensure the blue housing unit(s) remain in a vertical position while screwing on the black top. Otherwise the loose cartridge inside might mis-align and be damaged by the prongs / guides under the black top. This damage will void warranty for the filter cartridge(s).

Do not let the system freeze.

Commissioning the Unit

Check for any leaks. Run the cold water tap nearest to the filter for 5 minutes to release any trapped air. Repeat this process with all other cold water taps in the property and flush any toilets once.


Inlet/Outlet Connection:... 22mm Female Compression

Temperature:................... 40° - 110°F

Water Pressure: 15 min.,  100 max (PSI)


Important Note re Reminders

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

Cartridge Life: Change every 12 Months Depending on Local Water Conditions Re-order code CA-BB-HM

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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