Fridge water line leak: damage, cleanup and prevention

Why this small tube causes large claims

A fridge with an ice maker or water dispenser is fed by a narrow supply line, often six millimetres across. It runs from a cold water pipe, usually under the kitchen sink or in the basement below, to the back of the fridge. The line is under full household pressure all day, every day.

Three things make it risky:

• It is hidden behind a heavy appliance that is rarely moved
• Many are thin plastic tubing that hardens and cracks with age
• A leak is small enough to go unnoticed and constant enough to do a great deal of damage

How it leaks

• Plastic tubing splits, or is cut by the fridge being pushed back over it
• Copper tubing kinks when the fridge is moved, and later cracks at the kink
• Compression fittings loosen at the fridge or at the supply valve
• Saddle valves fail. These clamp onto a pipe and pierce it with a needle. They are prone to leaking and are not permitted by plumbing codes in many places.
• The fridge’s inlet valve or internal tubing cracks
• The filter housing inside the fridge leaks
• The defrost drain blocks and water runs out under the crisper drawers. This is not the supply line, but it produces a puddle too.

Signs

• Water on the floor at the front or side of the fridge
• Flooring that is lifting, cupping, soft or discoloured nearby
• A musty smell from behind the fridge or the next cabinet
• A stain on the basement ceiling below the kitchen
• Low water flow at the dispenser, or small, hollow ice cubes
• A hissing or dripping sound behind the fridge
• A higher water bill

Stop the water

1. Find the shut-off for the fridge line. Look under the kitchen sink, in the basement ceiling below the fridge, or in a recessed box in the wall behind it.
2. Turn it off. If you cannot find it, shut the main.
3. Switch off the ice maker.
4. Mop up what you can see.

Check how far it went

Unplug the fridge and pull it straight out, with care for the line and the floor. Then look at:

• The floor under and behind the fridge. Hardwood cups and stains. Laminate swells. Vinyl hides water beneath it.
• The subfloor. Press on it. Softness means it has been wet for some time.
• The wall behind. Stains, swollen baseboard and mold low down.
• Adjacent cabinets. Look at the base and the toe-kick for swelling. Water runs under cabinets.
• The room on the other side of the wall.
• The ceiling below, and the basement joists and subfloor seen from underneath.

A moisture meter shows the full extent, which is nearly always wider than the visible staining.

Drying and repair

A sudden split found at once is a straightforward drying job. A slow leak found late usually means more.

• The fridge is moved out of the way
• Flooring that is trapping water is lifted. Floating floors and underlay come up. Hardwood may be dried in place if caught early.
• Baseboards are removed, and wet drywall is opened or cut out
• Toe-kicks are removed so that air can be driven under cabinets
• Dehumidifiers and air movers run until readings are normal
• Any mold found is removed
• The ceiling below is opened where it is saturated
• Flooring, drywall and finishes are replaced

Matching is the usual difficulty. Kitchen flooring often runs under cabinets and into the next room, and a product that is no longer made cannot be patched invisibly. Raise this with your adjuster early.

Replace the line properly

• Use braided stainless steel supply line made for ice makers, or copper installed without kinks. Avoid thin plastic tubing.
• Replace a saddle valve with a proper quarter-turn shut-off valve on a tee fitting.
• Leave a loop of slack behind the fridge so that it can be pulled out without straining the line.
• Do not push the fridge back hard against the wall. Check that the line is not trapped or kinked.
• Check the connections for drips after a few hours and again after a few days.

Prevention

• Put a battery water alarm on the floor behind the fridge. They cost little.
• Consider an automatic shut-off valve that closes the water when a sensor gets wet.
• Pull the fridge out once a year, vacuum the coils and look at the line and the floor.
• Replace the line when you replace the fridge. Do not reuse the old one.
• Change the water filter on schedule and check the housing for drips.
• Know where the shut-off is.
• Turn the line off if you are away for an extended period.

If you do not use the ice maker or dispenser, have the line capped at the supply valve.

Insurance

A line that splits suddenly is the kind of accidental escape of water that home policies commonly cover, for the resulting damage. The line itself is not covered. The difficulty with fridge lines is duration. If the adjuster finds rot, long-established mold or staining that shows the leak ran for months, the claim may be treated as gradual damage and limited or declined. Report it as soon as you discover it, keep the failed line and take photographs before anything is moved.

In a condo, a leak from your fridge that damages the unit below can result in the corporation charging its deductible to you. See condo water leaks.

More: burst pipe and water damage.