Did you know that fluctuations in winter water pressure might have created tiny cracks in your washing machine hoses and water heater valves? If left unaddressed, these can lead to unnoticed leaks or sudden water damage. Now that winter's gone and ground pressure is on the rise in April, it's a great time to perform a simple DIY test to identify any weak spots.

Diagnosing this spring maintenance risk is straightforward with just a paper towel. Wrap a sheet around your connection points, and if it gets damp within 24 hours, you've got a hidden leak that needs attention.

Ignoring this issue could result in costly repairs, especially since April showers increase pressure on drainage systems. Washer leaks rank among the top five reasons for insurance claims in U.S. homes. If one occurs while you're away, you might face the need for a total floor replacement, costing upwards of $10,000. Take proactive steps now with this easy DIY check.

Using the Paper Towel Test for Leak Detection

Unseen leaks can lead to expensive repairs as they may cause damage without any visible signs until floors start to warp or mold appears. Tiny cracks can also break open suddenly, causing extensive flooding that can be costly to fix. The expense of replacing a floor, for instance, can reach $10,000.

Josh Mitchell, an experienced HVAC pro and plumbing technician, explains how the paper towel test works to help you identify issues before they worsen.

  1. Grab a dry paper towel and wrap it snugly around the connection points of washing machine hoses, under-sink shutoff valves, dishwasher lines, and the base of the water heater valve.
  2. Ensure the towel touches the metal or fitting directly.
  3. Leave it there for 12 to 24 hours. If the towel feels damp or changes color, you have a leak.

This quick yet effective method can prevent expensive repairs, requiring no special DIY skills.

'I frequently use this technique because it reveals hidden problems,' Josh says. 'Winter damage often doesn't show as visible leaks but as moisture that repeatedly forms and dries on supply lines and valves. Paper towels catch that moisture promptly, making even a tiny leak noticeable within hours.'

These leaks typically start during winter, when water pressure varies significantly. Pipes contract in the cold and expand as temperatures rise.

'This movement weakens rubber seals and fittings,' Josh explains. 'By April, groundwater pressure rises and systems cycle more frequently, turning those small weaknesses into steady leaks or complete failures. That's when minor winter damage evolves into serious leaks.'

Josh stresses the importance of taking preventive action to find leaks before they lead to significant water damage.

Addressing Micro-Cracks in Your Washer Connections

'Fixing the problem earlier is inexpensive. Swapping a standard rubber hose for a stainless steel braided one costs around $15 to $20,' Josh suggests.

This $17.98 Everbilt stainless steel supply line is corrosion-resistant and easy to install.

Additionally, consider a leak alarm for around $10 to $15, which alerts you immediately if water starts pooling. This simple $14.54 leak alarm goes off if it detects water near hoses, valves, or supply lines.

Compare that to the consequences of a hose bursting while you're away. A broken hose can release 500 to 700 gallons in just a few hours, enough to ruin flooring, baseboards, drywall, and even cabinetry. Repair costs can range from $5,000 to $10,000 or more, depending on the extent of the flooding,' Josh notes.

What You Need to Shop For

To find and fix leaks in your supply lines, consider these affordable tools that can protect you against pressure shifts during April showers.

All prices were accurate at the time of writing.

Scott Paper Towels, Choose-A-Sheet, 6 Double RollsStock up

Scott Paper Towels, 6 Double Rolls

Make sure to have paper towels on hand for checking for hidden leaks around your home.

Zircon Leak Sensor Alarm against white background.Hands-off detection

Zircon Leak Sensor Alarm

Set these battery-operated sensors by water valves and hoses for immediate alerts to leaks.

X-Sense Wi-Fi Water Leak Detector Kit, Smart Water Sensor With App Alerts, Ultra-Slim Water Alarm for Basement, Kitchen & Bathroom, 4 Water Sensors + 1 Base Station, WhiteSmart leak detection

X-Sense Wi-Fi Water Leak Detector Kit

These intelligent sensors do more than sound an alarm; they send alerts to your phone, keeping you informed even when you're away.

Everbilt stainless steel washing machine supply line against white background.Durable

Everbilt Stainless Steel Washing Machine Supply Line

Switching from rubber to stainless steel supply lines enhances your defense against hidden leaks due to their durability and corrosion resistance.

Everbilt stainless steel dishwasher connector and parts against white background.For dishwashers

Everbilt Universal Stainless Steel Dishwasher Connector

This stainless steel connector serves as an affordable alternative to less durable rubber hoses for dishwashers.

Apollo 1/2 in. x 1/2 in. Stainless Steel Full-Port Ball Valve with Latch Lock Lever against white background.Under-sink protection

Apollo Stainless Steel Valve

This stainless steel valve offers robust leak protection beneath your kitchen sink.


Next, discover the two-minute DIY rule to maintain your home effectively, along with how to locate and repair typical household leaks.