Vacation Plumbing Checklist: How to Protect Your Singapore Home While You’re Away

Few things ruin a holiday like a message from your neighbor saying water is dripping through their ceiling. In Singapore’s humid climate and densely packed housing, a small leak in one unit can quickly become a costly problem for several households. This vacation plumbing checklist walks you through what to do before you leave, whether you live in an HDB flat, condo or landed home.

Quick Answer: What Should You Do Before You Travel?

Before a holiday, do these seven things:

1. Turn off the water at your isolation valve (for trips longer than a few days).
2. Switch off the water heater.
3. Check taps, toilets and under-sink pipes for drips.
4. Top up floor traps with water.
5. Turn off the taps feeding your washing machine and dishwasher.
6. Check that your aircon drain pipe is clear.
7. Give a trusted person your key and emergency plumber contact.

The sections below explain each step.

Should You Turn Off the Main Water Supply?

For any trip longer than a weekend, yes. Shutting off the water at your home’s isolation (stop) valve removes the pressure from your pipes, so if a hose splits or a joint fails, the water has nowhere to come from.

In most Singapore homes, the isolation valve is near where the water supply enters the unit. In HDB flats, check the kitchen, service yard or utility area. In condos, look near the water heater, in the household shelter, or in a pipe duct. Close it clockwise until snug, and test by turning on a tap to confirm the flow stops.

When to leave it on: If someone is staying in the home, or if an appliance such as a pet water dispenser depends on it, you can leave it on. Be sure to check the other items on this list.

Switch Off Your Water Heater

Water heaters are one of the more overlooked items in a holiday plumbing check. A storage water heater holds water under pressure and keeps drawing power even when no one is home. Before you travel:

• Turn off the heater’s isolation switch.
• Close the water supply valve to the heater if you have one.
• Check for rust, moisture or drips around the unit and its connections.

Instant heaters carry less risk but should still be switched off. Besides safety, this saves electricity while you’re away.

Top Up Floor Traps to Prevent Odors and Mosquitoes

This is a Singapore-specific step that many travelers miss. Floor traps hold a small amount of water that blocks sewer smells and pests from rising through the drain. In our hot, dryish indoor air, that water can evaporate over a few weeks.

Dry floor traps can lead to:

• Unpleasant sewer odors when you return.
• Pests such as cockroaches coming up from the drain.

Stagnant water elsewhere can also breed mosquitoes, so the National Environment Agency (NEA) advises Singaporeans to keep drains and water containers in check, especially during dengue season. Before you leave, pour a jug of water into each floor trap and flush the toilets. If you’ll be away more than two weeks, ask a friend to top up the traps and flush the toilets once a week.

Check for Leaks Before You Leave

A small drip you ignore at home can turn into a flood when no one is there. 

Do a five-minute walk-through:

• Look under the kitchen and bathroom sinks for moisture or stains.
• Check behind and around the toilet cistern and base.
• Inspect the water heater connections.
• Run each tap briefly and confirm it shuts off fully.
• Look for damp patches, bubbling paint or discolored ceilings, which can signal hidden leaks.

Hidden leaks and high water bills: If your PUB water bill jumps after a trip when no one used the water, a hidden leak may be to blame. If your home has a smart water meter, you can usually monitor consumption through the SP Utilities app. A simple test is to shut off everything and see whether the meter keeps moving. If it does, call a licensed plumber for leak detection rather than ignoring it.

Washing Machine, Dishwasher and Aircon

Appliances cause many holiday leaks:

• Washing machine and dishwasher: Turn off the water tap feeding each appliance and inspect the hoses for cracks or bulges. Replace old hoses before you travel.
• Aircon drainage: A blocked condensate pipe is a common cause of water dripping from ceilings and walls in Singapore homes. If your aircon hasn’t been serviced recently, book a service before you leave, and make sure the unit is turned off.

Short Trip vs Long Trip: What to Do

Who to Call: Why You Need a Licensed Plumber

In Singapore, plumbing work involving the water supply must be carried out by a licensed plumber, so avoid unlicensed handymen for repairs or pipe changes. A licensed plumber also knows PUB regulations, which helps keep your home compliant and your insurance claims clean.

Before you leave, prepare for the unexpected:

• Give a neighbor, relative or house-sitter a spare key.
• Tell them where the isolation valve is, and ideally show them.
• Save an emergency plumber’s number in your phone and theirs.

EzPlumber.Sg can inspect your pipes, taps, water heater and floor traps before you travel, and respond to leaks when you return. 

Frequently Asked Questions

Is it okay to leave my taps running or dripping while I’m away?

No. Leaving taps on wastes water, raises your PUB bill and risks overflow. Make sure every tap is fully closed.

Will turning off the main valve affect my toilet?

Your cistern will stop refilling once the valve is closed. This is normal. Don’t flush until you reopen the valve and let the cistern fill again.

What if a leak damages my neighbor’s unit while I’m away?

Responsibility depends on the source and cause of the leak, so you may be liable if it came from your fixtures. Check your home insurance coverage for water damage, and get a licensed plumber to assess any leak promptly.

How early should I do a plumbing check before travelling?

Aim for a week before your trip so you have time to repair anything you find.

What should I do when I return?

Open the isolation valve slowly, run each tap for a minute, flush all toilets, and check for leaks or discoloration. If you spot a problem, switch the water off again and call a plumber.

Final Thoughts

A little preparation goes a long way. Shutting off the water, switching off the heater, topping up floor traps and checking your appliances takes under 30 minutes and can save you thousands in repairs, plus a lot of stress. If you’d like a professional pre-holiday plumbing check, contact EzPlumber.Sg before you pack your bags.