How to Sterilise / Sanitise Your Reverse Osmosis Filtration Unit

It can be a good idea to disinfect your RO to make sure no bacteria builds up in the tank and tubes that sit in line after the main filtration process.

(The RO filter removes bacteria. But bacteria could slowly grow up in the tank and tubes after that stage.)

When to do this

Guidelines vary between every time you change the filters to once every year or two - to almost never!

Basically the hotter the country - where bugs grow more easily - the more often you should do it.

Carry out the following process before changing to a new set of filters.

Time Required

Ten minutes to remove the cartrdiges and sterlise the system.

Then wait between one to three hours to let the tank fill and empty three times (exact time depends on your local water pressure.)

How to / Steps

(For Codes RO-UKWFC | RO-PMP | RO-DEN-PMP | RO-HP-PMP

1) Turn off the water supply to the unit

2) Drain the tank by turning on the sink top tap/faucet and let it run dry

3) Remove the pre filter cartridges from the bottom / upright housing chamber

4) Remove the membrane cartridge - it’s inside the largest housing lying flat on the top of the system. (It can be tight so use a coat hanger or thin pliers to pull this out

5) Leave the other old smaller filters lying flat on the top of the system in place (i.e. do this sterilising process before changing the cartridges).

6) In the first housing chamber put two x 30ml capfuls of MILTON disinfectant (or similar) then re-attach / close the housing

7) Close all the other empty housing chambers fully

8) Make sure the sink top tap/faucet is CLOSED

9) Now turn on the water supply and let the tank fill up (this might take 30 mins to 2 hours depending on your incoming pressure)

Note When the tank is near to being full you might hear some strange noises from the auto shut-off valve because the pressure on each side of the diaphragm will be roughly the same. Ignore them)

10) Drain the tank by repeating steps 1 and 2

11) Flush the remaining disinfectant from the system by repeating steps 8, 9 and 10.

12) Turn off the water supply

13) Install all the new cartridges and the membrane. The system is now ready to use

14) Turn the water supply back on (Make sure the sink top tap/faucet is Closed)

15) Let the tank fill up again and you’re good to go!

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Keywords
Service / Servicing / Disinfect / Sterilise / sterilize / sterlizing

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