The Michigan sump pump checklist: 10 minutes that can save your basement.

The whole checklist takes about 10 minutes: pour a bucket of water into the pit, watch the float, listen for the check valve, clean out the pit, walk the discharge line outside, and test the battery backup if you have one. Do it twice a year, before the spring thaw and again in fall, and you'll catch most sump pump failures before they cost you a basement.

We've been working on sump pumps around Milford since 1979, and the calls always come in waves. A March thaw, a heavy spring storm, and the phone rings all day. Most of the pumps that fail in those weeks gave some kind of warning first. Nobody was looking for it. This checklist is how you look for it.

Why this area is hard on sump pumps

Southeast Michigan sits on heavy clay soil, and clay doesn't drain. It holds water right against your foundation, which means your sump pit fills any time the ground is saturated. In March, the snowpack melts into ground that's still half frozen, and the water has nowhere to go but down your drain tile. Your pump works its hardest right after it's been sitting idle all winter. That's a bad combination, and it's why a pump that seemed fine in November can quit in the first week of warm weather.

Around Milford, Highland, and White Lake, plenty of homes also sit in low spots near lakes and wetlands where the water table runs high. Those pumps cycle more, wear faster, and deserve this checklist more than most.

The 10 minute checklist

1. Run the bucket test. Pour about 5 gallons of water into the pit, enough to lift the float. The pump should kick on within a few seconds, empty the pit, and shut off cleanly. If it doesn't turn on, hums without pumping, or keeps cycling after the pit is empty, you've found a problem worth fixing now instead of in April.
2. Watch the float. While the water level rises and falls, watch how the float travels. It should move freely through its full range. Floats get wedged against the pit wall, tangled in the power cord, or hung up on debris, and a stuck float is the most common reason a perfectly good pump fails to run.
3. Listen for the check valve. When the pump shuts off, you should hear one solid clunk as the check valve closes. If instead you hear water rushing back down into the pit, the valve has failed, and your pump is now lifting the same water twice. That doubles the wear for no reason.
4. Clean the pit. Pull out anything that isn't water: silt, gravel, shreds of plastic liner, the occasional toy. Debris gets pulled into the impeller and jams it, and it can hang up the float too. A shop vac makes quick work of it.
5. Walk the discharge line. Go outside and find where the pipe lets out. Water should exit several feet from the foundation and keep moving away, not pool against the house and soak right back into that clay. In March, check that the outlet isn't still frozen shut or buried under a snowbank. A blocked discharge deadheads the pump, which means it runs and runs while moving no water at all.
6. Test the battery backup. If you have one, unplug the primary pump and pour water in again. The backup should pick up the job on its own. Check the battery's age while you're down there; most need replacement every 3 to 5 years. If you don't have a backup, it's worth reading our honest take on whether a battery backup sump pump is worth it here, because the storms that flood basements in this area tend to take the power out at the same time.

When to run it

Twice a year covers most homes. Late February or early March is the big one, before the thaw asks your pump to do its hardest work of the year. Then again in October, before the ground freezes, so the discharge line and pit go into winter clean. If a long power outage has come and gone, or your pump is past 7 years old, run the bucket test again before any forecast that promises heavy rain.

What the checklist can't tell you

A pump can pass everything above and still be near the end. Sump pumps last about 7 to 10 years, and age doesn't always announce itself during a 10 minute test. If yours is in that range, or if you noticed anything marginal while testing (new noises, slow starts, rust in the pit), look through the 7 signs a sump pump is failing and be honest about what you're seeing. Replacing a tired pump in March on your schedule beats replacing it in April with two inches of water on the floor. Our sump pump service page covers what a replacement involves.

Quick answers

How often should I test my sump pump in Michigan?

Twice a year at minimum: late winter before the spring thaw, and again in fall before the ground freezes. Past year 7, add a quick bucket test before any forecast with heavy rain.

How do I test a sump pump?

Pour about 5 gallons of water into the pit. The pump should kick on within a few seconds, empty the pit, and shut off cleanly without short cycling. If any part of that doesn't happen, it needs attention before the next storm.

How long do sump pumps last?

About 7 to 10 years around here. Pumps in high water table areas that run often wear out at the early end of that range. Past year 7, test more often and start budgeting for the replacement.

Countryside Plumbing is a licensed master plumber serving Milford, Novi, Farmington Hills, and southeast Michigan since 1979. Sump pump service, including battery backups, is one of our specialties. Free quotes at 248-705-7543.