How to Clean Your Water Purifier at Home — Step-by-Step Guide

You should clean your water purifier at different intervals depending on the component. The exterior and dispensing faucet should be wiped clean weekly with a damp cloth to prevent dust and grime buildup. The drip tray, if your purifier has one, should be emptied and cleaned weekly as stagnant water in the tray breeds bacteria and mosquitoes. The storage tank should be sanitised every 3 to 6 months by a technician during scheduled service visits, as this requires partially disassembling the unit. The dispensing nozzle or faucet tip should be cleaned monthly with a soft brush and mild soap to prevent biofilm buildup at the water exit point. The area behind and under wall-mounted or countertop purifiers should be cleaned monthly to prevent moisture damage and mould growth. These are user-level cleaning tasks that do not require technical knowledge. Internal cleaning such as flushing the RO membrane, cleaning filter housings, and sanitising the internal water path should only be done by trained technicians.

You can safely perform basic external cleaning and some accessible internal tasks, but deep internal cleaning should be left to trained technicians. Tasks you can do yourself include wiping the exterior, cleaning the dispensing faucet or nozzle tip, emptying and washing the drip tray, and flushing the system by dispensing and discarding the first glass of water each morning after overnight stagnation. Tasks that require a technician include opening filter housings to clean or replace filters because improper reassembly causes leaks, sanitising the internal storage tank because it requires draining the tank and using food-grade sanitiser in the correct concentration, flushing the RO membrane with cleaning solution because incorrect solutions or concentrations can irreversibly damage the membrane, and cleaning or replacing internal tubing because improper reconnection causes leaks or air locks. Attempting internal work without training risks contaminating the system, damaging components, and voiding the warranty.

For cleaning your water purifier exterior, use a soft damp cloth with plain water for regular weekly wiping. For stubborn stains or kitchen grease that accumulates on the surface over time, use a mild dish soap solution on a soft cloth. Wring the cloth well before wiping to prevent water from entering the unit through ventilation slots or gaps. Dry the surface with a clean dry cloth afterward. Never use abrasive cleaners, scouring pads, or steel wool as these scratch the surface and damage the finish. Never use chemical cleaners, bleach, or strong detergents near the purifier as fumes or residue can contaminate the water path. Never spray water directly onto the purifier as this can damage electronic components, the pump motor, and circuit boards. For stainless steel faucets like the Boon Tap dispensing faucet, use a soft cloth with mild soap. Stainless steel specific cleaners are safe but not necessary. Avoid abrasive cleaners that scratch the brushed finish.

The internal storage tank should be cleaned and sanitised every 3 to 6 months, ideally during a scheduled service visit. The process involves draining all water from the tank, then cleaning the interior with a food-grade sanitising solution at the correct dilution. Common sanitisers used by technicians include sodium hypochlorite at 50 to 100 parts per million concentration or citric acid solution. The sanitiser is left in contact with the tank walls for 15 to 20 minutes to kill biofilm and bacteria, then thoroughly rinsed with purified water until no sanitiser residue remains. The tank is then refilled and the first 2 to 3 litres are discarded. This is not a recommended DIY task for two reasons. First, incorrect sanitiser concentration can either be ineffective at killing bacteria or leave harmful chemical residue in the water. Second, accessing the tank requires partial disassembly of the purifier, and improper reassembly causes leaks or contaminates the post-purification water path.

The dispensing faucet or nozzle tip gets dirty for reasons unrelated to water purity. First, kitchen air carries grease, dust, and cooking particles that settle on all surfaces including the faucet tip. Over time, this external contamination forms a visible film on and around the dispensing point. Second, mineral deposits from water droplets that dry on the faucet surface leave white calcium or salt residue, especially in hard water areas. This is cosmetic but can harbour bacteria if not cleaned. Third, biofilm can develop at the faucet tip where moisture is always present. Biofilm is a thin layer of bacteria that colonises any moist surface, including the last centimetre of the dispensing point after purification. This is why the faucet tip should be cleaned monthly with a soft brush and mild soap. Fourth, in under-sink purifiers, the faucet is exposed to sink splashes, food particles, and cleaning chemical residue from regular kitchen use. Regular cleaning of the faucet exterior and tip ensures that clean water does not pick up contamination at the last point of contact.