If you’ve lived in Mesa for more than a year, you already know the drill: one day it’s dry as a bone and pushing 110°F, and then — seemingly out of nowhere — the sky turns orange, the wind kicks up, and suddenly you’ve got a wall of water dumping inches of rain in about 45 minutes. That’s Arizona’s monsoon season, and while it’s genuinely exciting (okay, terrifying), it’s also one of the most stressful times of year for your home’s plumbing.
At One Call Plumbing Services, we’ve been handling monsoon-season plumbing emergencies in Mesa and across the East Valley for over 25 years. We’ve seen it all — flooded garages, backed-up sewer lines, cracked pipes from soil shifting, and drain systems that just couldn’t handle the sudden surge. The good news? Most of these problems are preventable with a little prep work before the storms arrive.
Why Arizona’s Monsoon Season Is Uniquely Rough on Plumbing
Arizona’s monsoon season plumbing challenges are different from what homeowners in other states deal with. You’re not just fighting rainfall — you’re fighting a perfect storm of factors. Mesa sits on clay-heavy soil that expands dramatically when it gets wet and contracts hard when it dries out. During a monsoon event, underground pipes can shift, crack, or separate at joints as the soil moves. Storm drain systems get overwhelmed fast when 2 inches fall in 90 minutes, and that overflow sometimes backs up through your sewer line.
Your Pre-Monsoon Plumbing Checklist
1. Clean and Test All Exterior Drains
Walk around your home and locate every exterior drain — patio drains, driveway drains, pool deck drains. Pour a bucket of water into each one and watch what happens. If it’s slow, there’s probably a buildup of dust, debris, and caliche. If it’s still slow after flushing with a garden hose, you may need professional drain cleaning.
2. Inspect Your Sewer Cleanout
Your sewer cleanout is a pipe sticking a few inches out of the ground somewhere near your foundation. Make sure the cap is on tight and not cracked. A missing cap is an open invitation for debris and floodwater to enter your sewer system during a monsoon.
3. Look for Signs of Slow Drains Inside
Run every sink, shower, and tub. Slow drains in multiple fixtures — especially if your toilets are gurgling — can indicate a partial blockage in your main sewer line. Get that checked before monsoon season.
4. Check for Existing Leaks
Walk through your home and check under all sinks, around toilet bases, and in your laundry room. Small leaks now become major problems when monsoon rains spike humidity levels.
5. Protect Your Water Heater
If your water heater sits in the garage (common in Mesa), make sure it’s elevated on a stand or platform at least 4 inches off the ground. Monsoon flooding in garages is extremely common, and a water heater sitting in standing water is both a damage risk and a safety hazard.
What to Do During a Monsoon Plumbing Emergency
If the worst happens and you experience a plumbing emergency during a monsoon, here’s what to do:
- Know where your main water shutoff valve is and turn it off immediately if you have a burst pipe or major leak
- Don’t use any drains, toilets, or faucets if your sewer is backing up — every flush adds to the problem
- Move valuables away from any flooding area
- Call a licensed plumber immediately — don’t wait for the storm to pass
Frequently Asked Questions
How often should I have my drains cleaned before monsoon season?
We recommend a professional drain cleaning at least once a year, ideally in April or May before monsoon season starts in mid-June. If you have mature trees near your sewer line, twice a year is even better.
Can monsoon season damage pipes that are in good condition?
Yes. Even newer pipes can be affected by soil movement during heavy rains. Arizona’s clay-heavy soil expands and contracts significantly, which puts stress on underground pipe connections and joints.
What’s the most common plumbing emergency during Arizona monsoons?
Sewer line backups. When municipal storm drains overflow, that pressure can push wastewater back into your home through floor drains and toilets. Having a backwater valve installed is one of the best preventive measures.
Get Your Plumbing Monsoon-Ready
Don’t wait until the first storm hits to find out your plumbing isn’t ready. One Call Plumbing Services has been protecting Mesa, Gilbert, Chandler, Tempe, Scottsdale, Phoenix, and Queen Creek homes for over 25 years. Call us at 480-663-2255 to schedule a pre-monsoon plumbing inspection and give yourself peace of mind before the storms arrive.