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Plumbers of Knoxville
Plumbers of Knoxville
Plumbing · Tennessee
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Sump Pump Repair

A pump that's failing needs sorting between storms rather than during one, because the night it's really needed is the night nobody can get under the house.

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When this becomes an emergency

What a pro does

Sump work around Knoxville is mostly crawlspace work. Full basements aren't the norm here, so the pump is usually sitting in a pit dug into the dirt floor under the house, dealing with groundwater that arrives after a hard spring rain or seeps in year-round on a lot cut into a hillside. The plumber watches a full cycle before touching anything, because how a pump misbehaves narrows the cause. Constant running with the pit not emptying points at the impeller or the discharge. Silence with water rising is the float or the power. Rapid short cycling often means a check valve that's letting the discharge run back down into the pit. That discharge line gets followed outside too, since a pipe that dumps water four feet from the foundation just recirculates it, and on the sloping lots common through this area the outlet sometimes sits uphill of where it needs to be. Battery backup gets discussed on properties that genuinely depend on the pump, because the storms that fill a pit fastest are the storms that knock the power out.

Frequently asked questions

Because crawlspaces flood too. On a hillside lot the uphill side of the crawl takes groundwater during wet weather, and a pit with a pump is how that water gets moved out before it sits under the floor joists and feeds moisture into the house.
The motor is getting power while the impeller isn't moving water, which usually means it's jammed with grit or the discharge is blocked. Crawlspace pits collect clay and gravel, and either will stop an otherwise sound pump.
Most often a failed check valve. Without it, the water that just went up the discharge pipe drains back into the pit and trips the float again, so the pump keeps restarting and wears out much faster than it should.
It's the best time. A stuck float or a seized motor gives no warning until water is already rising, and a dry-period check means running it deliberately to confirm it still cycles and still discharges where it should.

Sump Pump Repair?

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