How Extreme Heat Affects Your Plumbing — And What to Do About It

Medford and Greater Boston have been dealing with some serious heat lately. While most homeowners worry about A/C units and power bills, your plumbing system could also be at risk — and most people don’t even realize it.

At In A Flash Heating & Plumbing, we’re seeing more and more summer service calls caused by issues that extreme heat either creates or makes worse.

🚱 1. Pipe Expansion Can Lead to Cracks and Leaks

When temperatures soar, your plumbing pipes expand — especially if they're exposed (like under decks, in basements, or along outside walls). Over time, this expansion can weaken joints, create micro-cracks, or even burst pipes if pressure builds up.

🔧 Tip: Check for visible pipe swelling or tiny drips, especially in older copper or PVC systems.

💦 2. Water Pressure Fluctuations

High heat can cause municipal water systems to work overtime, especially during peak usage. This may result in low or inconsistent pressure, and sometimes even backflow issues.

🔧 Tip: If your water pressure suddenly drops or surges, call a plumber — it could indicate a more serious issue like a valve or pipe failure.

🌳 3. Tree Roots Love the Heat (and Your Sewer Line)

Hot, dry weather encourages tree roots to seek out moisture, and your underground sewer line is the perfect target. Cracked clay or aging cast iron pipes are especially vulnerable.

🔧 Tip: If your drains are slowing or you notice gurgling toilets, you might have root intrusion — don’t wait on this one.

🧯 4. Hot Water Heaters Work Harder

As water temps rise, your heater may cycle less frequently — but sediment buildup happens faster in warmer water. That means less efficiency and more strain, especially if you’re using a traditional tank system.

🔧 Tip: Flush your water heater mid-summer to prevent scale and extend its life.

🚿 5. Outdoor Fixtures Take a Beating

Irrigation systems, outdoor spigots, and hoses are in heavy rotation during heat waves. Without proper maintenance, they can leak, crack, or flood areas near your home’s foundation.

🔧 Tip: Inspect all outdoor plumbing weekly and install hose bib covers if they're in direct sunlight.

✅ Final Thought: A Mid-Summer Plumbing Check Can Prevent a Disaster

Most people don’t think about their plumbing until something breaks. But during record-breaking heat, a little prevention can go a long way.

Whether it’s a small leak or a major sewer backup, we’ve got your back — fast.

📍 Local to Medford or the Greater Boston area?
Give us a call or book a service visit today:
📞 781-572-2575