How can I tell a slow leak from a spill?
A spill dries and stops. A leak returns: the floor stays damp, flooring edges lift, cabinets darken or swell, and a musty smell builds. Check behind the appliance with a flashlight and run it once while you watch the hose and connections. If the water appears again, call for a plumber and a moisture check.
Moisture meters used by a crew can tell a spill from a leak by mapping the wet area and checking whether it extends beyond the visible spot.
A bill that rises with no change in habits is another sign. Compare the last few months and look at the water meter with everything off.
Which hoses should I replace?
Rubber washing-machine hoses commonly age and crack, so many owners replace them every few years with braided stainless supply lines, and check them for bulges. Refrigerator lines, dishwasher connectors and under-sink supplies deserve a look too. A plumber can replace them, and a shut-off valve that works makes any failure far smaller.
Turn the washing machine's valves off when you go away, and test the shut-off valves once a year so they do not seize. A valve that has not moved for a decade may not turn when you need it.
A drain pan with a drain line under a washer on an upper floor is inexpensive insurance.
Does a leak behind a refrigerator matter?
Yes, because it hides. Water behind the unit can run under the floor, into the wall and into the room below for weeks without being seen. If you find a damp spot or a stain near a refrigerator, pull the unit out carefully with the water line shut off and check the wall and the floor underneath.
The thin line that feeds an ice maker is a frequent culprit. It may have been bumped when the refrigerator was pushed back or may have simply aged.
Hardwood and engineered floors under a refrigerator are especially vulnerable. They cup and stain if the water sits.
What happens to the flooring under and around the appliance?
It depends on the material and how long the water sat. Tile and sealed hard floors usually dry in place, solid wood can often be saved if dried quickly, and laminate, engineered wood and vinyl plank tend to swell or lift. Water travels under the surface, so the crew checks the subfloor with a meter before deciding.
Laminate and engineered products swell at the edges and rarely return to shape once they have taken on water. If the planks are click-locked, a few may be lifted and the area underneath dried, which saves the rest of the room.
Sheet vinyl can trap water against the subfloor for weeks and hide a leak. A bubble or a soft spot in the vinyl near an appliance is a reason to check, not to wait.
What should I check before the next leak?
Look at the hoses and valves behind the washer and fridge, under the dishwasher and under every sink, once or twice a year. Replace hoses that are bulging, cracked or very old, test the shut-off valves, keep a drain pan under an upstairs washer, and consider a plug-in leak alarm on the floor. A ten-minute check is cheaper than a repair.
Write the date on new hoses, so you know their age, and keep a small bucket and towels where you can reach them. Make sure everyone in the household knows where the shut-off valves are.
If you will be away for more than a few days, shut off the washing machine valves, which is a simple habit that avoids a common kind of loss.
