End-of-Summer Plumbing Checklist: Protecting Your Michigan Home Before Fall

The Quick Answer

Michigan’s fall arrives fast. One week it’s 80°F and dry; three weeks later you’re waking up to frost warnings. The plumbing problems that most often turn into expensive emergencies between October and January are ones that had warning signs in August, but weren’t acted on.

This checklist takes most homeowners 30–60 minutes to run through. The items that need professional attention (sump pump test, water heater flush, pipe insulation in the crawl space) are straightforward service calls that cost far less in August than in December.

Your August Plumbing Checklist: 8 Items Before Fall

💧 Inspect and Test Your Sump Pump

West Michigan’s heaviest rainfall often comes in September and October. A sump pump that’s sitting dormant through a dry August summer may be unresponsive when it’s suddenly needed in a fall storm. Testing now gives you time to address a failing pump before the rain season peaks — not while water is already entering your basement.

How to test your sump pump:

• Pour a bucket of water slowly into the sump pit until the float rises and the pump activates
• Confirm the pump runs, moves water, and shuts off when the float drops
• Check that the discharge line runs freely to the exterior and isn’t obstructed
• If you have a battery backup, verify the battery holds a charge — replace if it’s more than 3 years old
• If the pump doesn’t activate, runs but doesn’t move water, or makes unusual noises, schedule a service call now

See our full guide: Plumbing Problems You Should Never Ignore in Your Michigan Home.

🚰 Check Every Outdoor Hose Bib and Faucet

Michigan’s first hard freeze typically arrives between mid-October and early November. Any outdoor faucet that isn’t frost-free — or that has developed a slow drip or faulty shutoff — needs to be addressed before then. A dripping outdoor faucet that freezes in October is a burst pipe repair in November.

What to check:

• Make a note of which faucets have interior shutoffs and where they are — you’ll need to know this in October
• Turn each outdoor faucet fully on and off — confirm it stops completely with no drip
• Check the faucet body and the area where it enters the wall for any cracks, separation, or moisture
• Identify whether your faucets are frost-free (longer body, angled design) or standard — standard bibs in Michigan should be shut off and drained each fall or replaced with frost-free models

Related: Outdoor Faucet & Hose Bib Repair in Michigan: Spring Startup Guide.

🔥 Flush the Water Heater

Your water heater works harder in winter — more heating demand, colder incoming water, longer recovery times. Sediment that accumulated through the year reduces efficiency and shortens heater life. An annual flush in late summer gets the heater running clean before peak winter demand.

What to look for:

• Note the age of the unit — if it’s 10+ years old, budget for replacement in the next 1–2 years
• Listen for popping or rumbling during heating cycles — this indicates sediment buildup
• Check the T&P relief valve discharge pipe for signs of weeping or corrosion
• If you haven’t had the heater flushed in more than a year, schedule a Kenowa Plumbing service call

❄️ Inspect Pipe Insulation in Unheated Spaces

Pipes in crawl spaces, attached garages, uninsulated basements, and along exterior walls are the most vulnerable to freezing once temperatures drop. August is the right time to walk these spaces and check the condition of pipe insulation — not January when you’re already managing frozen pipes.

What to check:

• Walk your basement, crawl space, and attached garage with a flashlight
• Look for exposed pipe sections — particularly where pipes run close to exterior walls or through uninsulated joist bays
• Check condition of existing foam pipe insulation — it should be intact, fully covering the pipe, and secured with tape; replace any that is cracked, compressed, or missing
• Note any locations where pipes pass through foundation walls to the exterior — these penetrations should be sealed and insulated

If you find significant exposed pipe in a crawl space or unheated garage, schedule a Kenowa Plumbing visit to assess and insulate properly before October.

🚽 Test Every Toilet for Running Water

A running toilet costs you money every day it runs — and the municipal water rate in Grand Rapids doesn’t go down in summer. A mid-August toilet audit finds any running fixtures before you get the September bill and wonder what happened.

The dye test: drop food coloring into the toilet tank (not the bowl). Wait 10 minutes without flushing. If color appears in the bowl, the flapper is leaking and needs replacement. This is a quick homeowner repair or an easy service call.

Related: Toilet Repair vs Replacement in Michigan: When to Fix and When to Replace.

🔦 Check Under Every Sink for Slow Leaks

Open every sink cabinet — kitchen, bathrooms, laundry — and look carefully at the supply lines, P-trap, and drain connections. Feel along supply lines for moisture. Look for water staining on the cabinet floor, swollen cabinet material, or mold. A slow supply line drip that’s been running for weeks has been saturating the cabinet interior and potentially the floor below. Catching it now means a $150 repair. Missing it means a $3,000 cabinet and subfloor restoration.

Inspect the Irrigation System Before Shutting It Down

Michigan irrigation systems need to be winterized (blown out) before the first hard freeze — typically by mid-October. Before you do that, run each zone in August and check for: heads that aren’t popping up, zones that aren’t activating, visible spray pattern irregularities that suggest a cracked head, and any soft or wet spots in the yard that might indicate a lateral leak underground. Identifying and repairing these issues before the blowout is easier and cheaper than discovering them at spring startup.

• Run each zone and walk the area to confirm all heads activate and retract
• Check the backflow preventer for any signs of leaking or damage
• Note any zones with obviously reduced or misdirected coverage for repair before winterization
• Schedule your fall blowout appointment now — Kenowa Plumbing’s fall schedule fills in September

🔧 Know Where Your Main Water Shutoff Is

Every household member who is regularly home should know exactly where the main water shutoff is and be able to operate it. In a burst pipe or appliance failure scenario, the difference between turning off the water in 30 seconds and spending 10 minutes searching for the shutoff can mean thousands of dollars in water damage. This is the simplest item on the list and consistently the most overlooked.

• Locate the main shutoff (typically near the water meter, in the basement, or in a utility room)
• Turn it off and back on to confirm it operates freely — seized shutoffs are extremely common in older Michigan homes
• If the shutoff valve doesn’t operate or doesn’t fully stop flow, have it replaced now — not during an emergency
• Label the shutoff if it isn’t already labeled, and show every household member where it is

August Plumbing Checklist at a Glance

Checklist Item	What to Do	Urgency
Sump pump test	Pour water in pit, confirm activation and discharge	Same day if pump fails to activate
Outdoor faucets	Test all bibs; check for frost-free type; locate shutoffs	Before October freeze season
Water heater flush	Schedule annual flush; check age and T&P valve	August service call; urgent if 10+ years old
Pipe insulation	Walk crawl space, garage, basement for exposed pipes	Address before October
Toilet dye test	Dye test all toilets; replace failing flappers	Immediate — costs money every day
Under-sink inspection	Check all sink cabinets for moisture, staining, mold	Immediate if moisture found
Irrigation system check	Run each zone; inspect heads and backflow preventer	Repair before fall blowout
Main shutoff valve	Locate, test, label; replace if seized or failing	Now — don’t wait for an emergency

What Comes Next: Fall Winterization

This August checklist is the early-warning step. Completing it now gives you time to schedule any needed repairs before October — when Kenowa Plumbing’s schedule gets heavy with winterization calls. Once September arrives, the deeper fall preparation begins — watch the Kenowa Plumbing Resources & Guides library for our fall prep, winterization and frozen-pipe guides.

Frequently Asked Questions