The 10-Minute Monthly Leak Inspection: Everywhere Water Hides in Your Home
Ten minutes a month, room by room. Most of the losses we respond to were visible as a small drip or a stain for weeks beforehand.
Written by the San Ramon Water Damage Pros crew — IICRC-certified technicians working to the ANSI/IICRC S500 standard on water losses across San Ramon and the Tri-Valley. Guidance here reflects how we actually run jobs, not general advice.
A surprising share of the water damage we respond to was findable in advance. Not the burst pipes — those genuinely arrive without warning — but the slow appliance leaks, the failing supply connectors, the toilet seeping at the base, the water heater weeping at the fitting. Those show themselves for weeks, in places nobody looks.
Ten minutes a month, once a month, catches most of it. Here is the route.
Water damage happening right now?
We answer live 24 hours a day and commit to a 60-minute response across San Ramon.
+1 (201) 277-9344Kitchen — 3 minutes
- Open the sink cabinet and look with a torch. Check the supply connectors, the angle stops, the P-trap and the disposal connection. Feel the cabinet base for softness and look for staining or a water line.
- Check the dishwasher supply connector, usually a braided line running through the cabinet wall from under the sink.
- Look at the dishwasher door gasket for perishing or displacement — a common source of slow leaks onto the floor in front.
- Pull the toe-kick panel off once or twice a year and look underneath with a torch. Slow leaks stain long before they flood.
- Check the refrigerator ice-maker line where you can see it, and pull the fridge out annually to look behind it.
Bathrooms — 3 minutes each
- Open the vanity cabinet: supply connectors, angle stops, trap. Feel the base.
- Check around the toilet base for dampness or discolouration on the flooring — a failing wax ring shows there first.
- Rock the toilet gently. Movement means the flange or the floor beneath may be compromised.
- Put a few drops of food colouring in the tank and wait twenty minutes without flushing. Colour in the bowl means the flapper is leaking silently.
- Look at the shower or tub caulk and grout for gaps, and at the base of the surround.
- Check the ceiling below an upstairs bathroom for any staining.
Laundry and Water Heater — 2 minutes
- Pull the washing machine forward and check both supply hoses for bulging, cracking, stiffness or corrosion at the fittings. Replace rubber hoses with braided stainless.
- Confirm the drain hose is secured in the standpipe and cannot work loose during spin.
- Look at the floor behind and under the machine for staining.
- At the water heater: check for moisture or rust at the base, listen for rumbling or popping when the burner runs, and look at the T&P relief valve discharge pipe for signs of recent discharge.
- Confirm the drip pan is present and actually plumbed to a drain.
- Check the seismic straps: two of them, upper and lower third, anchored into structure.
Whole House — 2 minutes
- Walk the house listening. With everything off, a faint hiss or trickle in a wall or floor is pressurized water escaping.
- Walk barefoot across slab floors looking for a warm spot — the classic hot-side slab leak sign.
- Look at ceilings for new staining, particularly under bathrooms and around roof penetrations.
- Check exposed copper in the garage and crawl space for green or white crusty deposits, which indicate pitting corrosion on runs you cannot see.
- Note whether any door has started sticking, which can indicate structural movement.
- Look at your EBMUD bill against the same month last year.
Quarterly and Annual Additions
- Quarterly: run the meter test. Shut everything off and watch the low-flow indicator for fifteen minutes.
- Quarterly: exercise the main shutoff valve and the angle stops so they still turn when needed.
- Annually: pull the fridge and the dishwasher out and look behind them properly.
- Annually: get into the crawl space with a torch, or at least look in from the access, checking for standing water, damp soil and fallen insulation.
- Annually: flush the water heater to slow scale accumulation, and check its age from the serial number.
- Annually before the rains: the full storm prep checklist — gutters, downspouts, drains, grading.
What Ten Minutes a Month Actually Prevents
It is a hard routine to sustain because nothing ever happens, which is precisely the point. These are the losses we attend that a monthly walk-through would have caught while they were still trivial.
- The angle stop weeping into a vanity cabinet. Found at month one, it is a two-dollar washer; found at month eight, it is the cabinet base, the subfloor and the wall behind it.
- The toilet passing silently into the bowl. Costs money continuously, shows on no floor, and is the most common cause of an unexplained bill.
- The washing machine hose starting to bulge at the crimp. Visible for weeks before it bursts and replaceable in ten minutes.
- The water heater weeping at the base. A dried mineral trail on the pan or the slab is the warning that precedes a tank failure, often by months.
- The dishwasher seeping at the door seal. Runs under the machine and into the cabinet run where nothing is visible until the flooring lifts.
- The refrigerator ice-maker line at the connection behind the unit — a location nobody ever looks at, feeding a leak that runs under the fridge.
- The under-sink trap that has loosened. Cheap to tighten, and the cabinet base underneath is one of the most common pieces of water damage in any house.
Frequently asked questions
Monthly for the ten-minute walkthrough, quarterly for the meter test and exercising valves, annually for the deeper items — behind appliances, the crawl space, the water heater flush. Set a recurring calendar reminder; that is what makes it actually happen.
The toilet flapper, because it is completely silent and can waste a substantial volume continuously. The food colouring test takes twenty minutes of waiting and no effort. After that, the space behind the dishwasher and under the cabinet toe-kick.
It is worth fixing now rather than watching. Small continuous leaks cause the same cumulative damage as large ones — they just take longer to show. And a weeping connector is usually telling you the component is at the end of its life, which means the next stage is not a drip.
Feel with your hand rather than looking with your eyes. Run a dry hand along the underside of every supply connector, trap and valve under every sink in the house. Slow leaks that are invisible in a dim cabinet are unmistakable to touch, and most of the failures on the list above are found this way months before anything is visible.
A modest but real one. Noting the date and anything you noticed takes seconds, and it gives you a timeline if something does develop — knowing a cabinet was dry six weeks ago is genuinely useful information for both diagnosis and a claim. It also makes it obvious when you have skipped a few months, which is when things start being missed.
The short version
Kitchen, bathrooms, laundry, whole house. Ten minutes with a torch, once a month.
If you find something you cannot trace, we do leak detection across San Ramon with acoustic and thermal equipment — locating precisely rather than opening walls to look.
