The short answer
Heat and Pipe Expansion
When summer temperatures climb, metal and plastic pipes expand. If a pipe is rigidly mounted or has no room to move, the expansion can stress joints and fittings. Over time, this repeated stress can cause cracks or splits. Hot water lines are especially prone, as they carry heat from the water heater.
Another factor is the temperature of the water itself. In summer, incoming water from outdoor spigots or wells can be warmer, which increases internal pressure. Combined with high ambient heat, this can push pipes past their limits. If you notice a small leak during hot weather, it may be a sign of stress that could worsen.
High Water Pressure in Summer
Summer often brings increased water usage, such as filling pools, watering lawns, and running sprinklers. This can cause pressure spikes in your plumbing system, especially if your pressure regulator is faulty. Excess pressure can weaken pipe walls and cause sudden bursts, particularly at weak points like elbows or solder joints.
You can check your home's water pressure with a simple gauge attached to an outdoor spigot. If it reads above 80 psi, it is worth adjusting or replacing the regulator. Keeping pressure within a safe range protects all your pipes, not just the ones that burst.
- Monitor your pressure gauge monthly during hot months.
- Look for damp spots on ceilings or walls near pipe runs.
- Listen for hissing sounds from walls or floors.
- Check exposed pipes in crawl spaces or utility areas for bulges.
- Inspect outdoor hose bibs for drips after heavy use.
Soil Shifting and Ground Movement
Summer storms and irrigation can saturate the ground, causing soil to expand and contract. This movement can shift the earth around your home, putting pressure on underground pipes. Even a small shift can crack a pipe, especially if it is made of older cast iron or clay.
For homes on slabs, shifting soil can stress pipes running under the foundation. You might notice cracks in your driveway or walkway that align with pipe routes. If you suspect ground movement, a professional inspection can help determine if your pipes are at risk.
What to Do Right After a Burst
First, shut off the main water valve to stop the flow. This is usually near your water meter or where the main line enters your home. If you live in Mesa, keep the location of your shutoff valve written down so you can act quickly in an emergency.
Then, turn off your water heater to prevent damage from a lack of water. Open faucets to drain remaining water and relieve pressure. Move valuables away from the affected area and start removing standing water with towels or a wet vacuum. The sooner you dry things out, the less damage you will have. Policies vary, and your insurer decides what is covered.
- Locate and label your main shutoff valve today.
- Drain the system by opening the lowest faucet in the house.
- Use fans and dehumidifiers to dry the area.
- Photograph the damage for your insurance records.
- Avoid using electrical appliances near standing water.
Preventing Future Summer Bursts
Insulate pipes in attics and crawl spaces to reduce temperature extremes. Even in summer, cool nights can cause rapid contraction. Also, consider installing a pressure-reducing valve if your water pressure is high. This simple device can extend the life of your plumbing.
Regularly check for leaks and fix them promptly. Small drips can indicate weak spots that may fail under stress. If you are unsure about your pipe condition, a water damage inspection can identify potential issues. Taking these steps can save you from a messy and costly repair.
Need help right now?
Call (480) 898-4279 any time, day or night, and describe what happened.
Call Now (480) 898-4279Frequently asked questions
Can a pipe burst without freezing?
Yes, pipes can burst without freezing. High water pressure, thermal expansion, and ground movement are common causes. Even a small defect can fail when stress builds up. Regular maintenance and monitoring can help prevent this.
What are signs of a slow leak in summer?
Look for unexplained increases in your water bill, damp spots on walls or ceilings, or a musty odor. You might also hear a faint hissing sound. Catching a slow leak early can prevent a full burst and reduce water damage.
Should I turn off my water when on vacation?
Yes, turning off your main water valve before a summer trip is wise. This prevents bursts while you are away, especially if pressure spikes or a pipe fails. It also protects against leaks from appliances like washing machines.