Can You Install an RO Water Purifier in a Rental? Is Plumbing Required? 4 Damage-Free Solutions for Hong Kong Tenants in 2026
Short answer:Yes, andno alterations to the premises are required。The most common choice for tenants is a “no-installation countertop model” — simply place it on the countertop, plug it in and fill the water tank; take it with you when you move out. No drilling or pipe connections are required. If you want to connect it to the mains water supply, you can use a “diverter (splitter valve)” attached to the faucet or angle valve, and the setup can likewise be fully restored. What you must not do is drill holes in the countertop or modify the concealed water pipes.
What are the differences between the three methods? (from safest to most ambitious)
The conclusion is clear:A and B already meet the needs of 90% of renters, D should only be considered for owner-occupied properties or with the landlord’s written consent.
| 1 HK$ = | S$ SGD | A$ AUD | £ GBP | US$ USD |
|---|---|---|---|---|
| Reference exchange rate | S$0.16332 | A$0.18128 | £0.09565 | US$0.12748 |
Why are renters most afraid of “water leaks”?
Because plumbing modifications involve two risks: first, liability for water leaks (rental agreements typically require tenants to be responsible for damage caused by negligence); second, disputes when moving out (the landlord may require the premises to be restored to its original condition). Diverters and T-connectors are bothadd-on componentsthat do not alter the original structure and leave no trace after removal, making them the lowest-risk option.
Practical tip: Before installation, place a towel or small basin under the connection, and check for any water seepage at the joint within 24 hours of first use.Most water leaks are caused by insufficiently tightened connections, not product defects.
🏠 How much do no-installation models cost? (Verified on 2026-10-28)
The table below lists only models that can be used without modifying the unit or connecting to the water supply. Prices are automatically generated by our SHOPLINE product API. Verification date: 2026-10-28.
Tank-based or plumbed-in: which should renters choose?
Answer:If you drink less than 5 liters of water a day, choose a tank-based model—— No plumbing, no need to turn off the water supply, and the most convenient option when moving;If there are 3 or more people in the household, or you use more than 8 liters a day, choose a plumbed-in model—— No need to refill it every day, but one installation is required.
The practical limitation of tank-based models is capacity: the common capacity is 3–5 liters, which means you need to refill it 1–2 times a day. Many people only realize how inconvenient this is after buying one, so think it through before making a purchase.
Which clauses in the lease should you pay attention to?
The three most relevant ones are:① The “Alterations and Additions” clause(whether written consent is required),② The “Reinstatement” clause(the responsibility to restore the property when the lease ends),③ The “Repair Responsibility” clause(who is responsible for damage caused by water leaks).
If your lease states that “the landlord’s written consent is required for any additional equipment installation,” the simplest approach is touse Plan A(no installation required at all), or obtain written consent via WhatsApp first and keep a record.
How should you take it with you when moving?
Three steps:① Turn off the water supply, remove the diverter, and reinstall the aerator on the original faucet;② Drain any remaining water from the water purifier (most models have a drain outlet; if not, let it run until the water tank is empty);③ Remove the filter cartridges and place them in sealed bags separately to prevent leaks from contaminating other items during transport.
After reinstalling the unit at your new home, it is recommended to run water through it for 2–3 minutes before drinking, especially if the machine has not been used for an extended period.
What other common questions are there?
Can I really not install it if the landlord does not approve?
Plan A (countertop, non-plumbed) generally does not constitute an “alteration,” but it is still recommended that you notify the landlord first to avoid disputes when the lease ends.
Will the diverter affect the water flow from the original faucet?
It will slightly reduce the flow rate because the water has to pass through the diverter. Most people will not notice, but if you are using a low-pressure faucet, it is recommended to check the water pressure first.
Do I need to hire a technician to remove it when the lease ends?
No. The diverter and three-way connector can both be removed and installed using a wrench, and the process generally takes less than 10 minutes.
The water purifier is quite heavy. Can the countertop support it?
Most countertop water purifiers weigh 10–20 kilograms when filled with water; if you have a thin shelf or a movable countertop, it is recommended that you confirm its load-bearing capacity first.
Sources and Methodology
Lease terms: Common residential lease templates in Hong Kong (not relating to any specific case). Installation method: Compiled based on the actual installation experience of models sold by our store. Limitation: Faucet models vary significantly between residential estates, so diverter compatibility must be confirmed individually; this articledoes not constitute legal advice。
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