# Before the Year-End Rains and Holidays: Plumbing Checks for KL Homes (December 2026) | KL Plumbing Handbook > Heading into December 2026 rain and year-end travel? Check gutters, floor traps, tank, pump and heater, and know how to shut off water before you leave. URL: https://klplumbing.my/blog/year-end-rain-holiday-plumbing-checks-2026/ Last-Modified: 2026-11-12 Author: KL Plumbing Handbook editors December 2026 brings two things that are hard on home plumbing in the Klang Valley: heavy rain and an empty house. Rain tests your gutters, drains and waterproofing. Year-end school holidays mean many homes sit empty for days, so a small leak can run unnoticed. A few checks in late November and early December can save you a stained ceiling or a nasty surprise when you get back. ## Before the heavy rain Heavy rain through the year makes blocked gutters, overflowing drains and failed waterproofing common causes of ceiling stains here. Before the wettest weeks: - **Clear gutters and downpipes** of leaves and silt, from the ground or a stable ladder with someone holding it. Do not walk on the roof. - **Check where each downpipe empties.** It should run into a drain that can take the water, not onto the porch. - **Clear outdoor drains** around the house. Our guide on an outdoor drain overflowing after rain [/guide/outdoor-drain-overflowing-rain/ →](/guide/outdoor-drain-overflowing-rain/) explains what to check and when to report a public drain to the council. - **Clear the balcony drain** in a condo, so rainwater does not pool against the door. - **Look at your ceilings** below the roof and bathrooms, and note any stains now so you can tell if they grow. If a stain appears after rain, read Roof Leak or Pipe Leak? [/guide/roof-leak-or-pipe-leak/ →](/guide/roof-leak-or-pipe-leak/) to work out where the water is coming from. ## Before you travel An empty house is when a dripping hose or running cistern does the most damage, because nobody sees it. 1. **Know where your main valve is.** In a landed house it is the stopcock near the meter. In a condo it is usually your unit valve. Our guide on how to turn off your main water supply [/guide/how-to-turn-off-main-water-supply/ →](/guide/how-to-turn-off-main-water-supply/) shows where to look. 2. **Close the main supply** if the house will be empty for several days and nobody needs water while you are away. 3. **Switch off the water heater** at its switch. 4. **Switch off the booster pump,** so it cannot run dry or keep starting because of a small leak. 5. **Close the angle valves** under sinks and toilets if you are not closing the main supply. ![Packed luggage by a front door with a hand closing the stopcock near the meter outside](/images/content/packed-luggage-by-a-front-door-with-a-hand-closing.webp) ## Top up floor traps Every floor trap holds a little water that stops sewer smells coming up. In an empty house, that water evaporates. Pour a jug of water into every floor trap, including balconies and service yards, before you go. A small splash of cooking oil on top slows evaporation. Our guide on a bad smell from a drain or floor trap [/guide/bad-smell-drain-floor-trap/ →](/guide/bad-smell-drain-floor-trap/) explains why. ![Hand pouring a jug of water into a balcony floor trap before travelling](/images/content/hand-pouring-a-jug-of-water-into-a-balcony-floor-t.webp) ## Landed house or condo unit | Check | Landed house | Condo unit | | --- | --- | --- | | Gutters and outdoor drains | Yours to clear | Building management | | Roof tank and pump | Yours: check tank, switch pump off | Building management | | Balcony drain | Yours | Yours | | Main valve | Stopcock near the meter | Your unit valve | | Ceiling leak from above | Not applicable | Report to building management | In a condo, tell the management office if you will be away for a long time, and leave a contact number in case of a leak from the unit above. ## When you come back - **Open the main valve** slowly and let taps run until the water is clear. - **Switch the pump and heater back on** once water is flowing. - **Check ceilings** for new stains. - **Run a meter test.** Close every tap, read the meter, wait a few hours, and read it again. Our Water Meter Leak Test Calculator [/tools/meter-leak-test-calculator/ →](/tools/meter-leak-test-calculator/) turns the readings into litres per day. ## When to call a plumber Call a plumber if you find a leak after the meter, a cistern that keeps running, or a pump that will not move water when you return. For stains that clearly follow the rain, you need a roofer or waterproofing contractor. The Roof Leaks and Waterproofing section [/roof-leaks-and-waterproofing/ →](/roof-leaks-and-waterproofing/) explains the options. For anything else that turns up, start from the home plumbing guide for KL homes [/ →](/) , which lists every problem by section. **Ready for the rain?** Read the Roof Leaks and Waterproofing section [/roof-leaks-and-waterproofing/ →](/roof-leaks-and-waterproofing/) About the authors KL Plumbing Handbook editors The KL Plumbing Handbook editors write plain-language guides on home plumbing problems, repair costs and hiring a plumber for homes in Kuala Lumpur and the Klang Valley. Each guide covers one problem and states the source and date of every cost figure. Spotted an error? Send a correction [/contact/ →](/contact/) . See our editorial policy [/editorial-policy/ →](/editorial-policy/) . ## Read next Roof Leaks and Waterproofing Ceiling stains, roof leaks, bathroom and balcony waterproofing. Go arrow\_forward [/roof-leaks-and-waterproofing/ →](/roof-leaks-and-waterproofing/) KL Plumbing Handbook Launches: 14 Guide Sections for Kuala Lumpur Homes (November 2026) KL Plumbing Handbook is live: free plain-language guides on leaks, drains, toilets, heaters, tanks, costs and condo leak rules, with prices dated 15 Nov 2026. Go arrow\_forward [/blog/kl-plumbing-handbook-launch/ →](/blog/kl-plumbing-handbook-launch/) All guides Every guide, grouped by section. Go arrow\_forward [/guide/ →](/guide/)