Plumbing Tips for Hawaii's Rainy Season: Protect Your Home

Rainy Season Is Coming — Is Your Plumbing Ready?

I'm Jack Perry from Hawai'i Plumbing & Drain Cleaning Squad. Every year from November through March, Oahu gets hit with heavy rains that test every plumbing system on the island. After 8+ years of emergency calls during storms, I can tell you — the homeowners who prepare in advance almost never call us in a panic. The ones who don't? They're the midnight emergency calls.

Here's how to protect your home before the rains hit.

Clean Your Drains NOW

The single best thing you can do before rainy season is get your drains professionally cleaned. Clean drains handle heavy water flow. Partially clogged drains back up when the volume increases. It's that simple.

Schedule a drain cleaning in September or October. We'll clear your kitchen drain, bathroom drains, and main sewer line so everything flows freely when the heavy rains arrive. Think of it as winterizing your plumbing — Hawaii style.

Check Your Outdoor Drains and Gutters

Walk around your property and check:

• Gutter downspouts: Make sure they direct water at least 3 feet away from your foundation. Clogged gutters overflow and dump water right next to your house.
• Yard drains: Clear leaves, dirt, and debris from any yard or area drains. A blocked yard drain turns your yard into a pond.
• French drains: If you have them, make sure they're clear and flowing. Pour water into the inlet and verify it exits at the outlet.

Know Your Shutoff Valves

During a storm is the worst time to figure out where your water shutoff is. Find these NOW:

• Main water shutoff: Usually at the water meter near the street
• Individual fixture shutoffs: Under sinks, behind toilets
• Water heater shutoff: On the cold water inlet pipe above the unit

Test each one to make sure it actually turns. Old valves can seize up from disuse — better to find that out now than during a flood.

Inspect Your Sewer Line

Heavy rain puts enormous pressure on sewer systems. Groundwater infiltrates cracked pipes, adding volume that the system can't handle. If your sewer line has any existing damage — cracks, root intrusion, offset joints — rainy season will expose it in the worst way possible.

A pre-season camera inspection ($150-$250) shows you exactly what condition your sewer line is in. If we find issues, you can address them on your schedule rather than dealing with a sewage backup during a storm.

Protect Low-Lying Fixtures

If your home has any plumbing fixtures below the street level — basement bathrooms, ground-floor laundry, low-lying water heaters — they're at risk during heavy rain. Consider:

• Backwater valve: Prevents sewage from backing up into your home ($500-$1,500 installed)
• Sump pump: Removes water that collects in low areas
• Elevated water heater: Raising your water heater 18+ inches protects it from minor flooding

Emergency Preparedness

Even with preparation, storms can surprise you. Keep these on hand:

• Our number: (808) 353-8445 (we answer 24/7)
• A basic plumbing tool kit (plunger, adjustable wrench, bucket)
• Towels and a wet/dry vacuum
• Your insurance company's claims number

At Hawai'i Plumbing & Drain Cleaning Squad, we're here for you before, during, and after the storm. Call us at (808) 353-8445 to schedule your pre-season drain cleaning and inspection. A little preparation now saves a lot of stress later.