Sump Pump Repair & Installation
The equipment that manages groundwater once it is identified as groundwater.
Learn moreDiagnostics
Is It a Pipe, the Ground, or the Air?
Water on a basement floor has four common sources and only one of them is a plumber's job. Getting that answer right first is the difference between a repair that works and thousands spent on the wrong trade.
Lines are open right now:
(833) 472-2088
Tell us when it happens and in what weather. That narrows it fast.
Source before solution
Plumbing, groundwater, surface water or condensation. They are not the same.
Straight answers
If it isn't plumbing we say so, and name the trade that owns it.
Panhandle and snowmelt
Spring melt and a February thaw produce their own kind of basement water.
Tested, not assumed
Meter checks, isolation, moisture mapping and dye testing where it helps.
Diagnosis
Four sources, and how to tell them apart
A supply leak. Pressurised, so it runs continuously whether or not anyone is using water. Clean water, often warm if it is the hot side, usually worst directly below a pipe run or near the water heater. The water meter moves with everything turned off. This is a plumbing repair, and it is the most urgent of the four because the volume never stops.
A drain or waste leak. Intermittent, tied to use: it appears after a shower, after the washing machine cycles, or after a toilet upstairs is flushed. Often discoloured, sometimes with an odour. Common at cast iron that has rusted through, at separated joints, and at a floor drain or cleanout with a failed seal.
Groundwater and surface water. Seasonal and weather-driven. It arrives during and after rain, during snowmelt, or when the water table rises in spring. It enters at the cove joint where the floor meets the wall, through cracks, or up through the floor. Nothing plumbing-related is involved, this is drainage, grading and foundation work, though a sump pump is part of managing it.
Condensation. Warm humid air meeting cool concrete and cool pipes. It appears in warm weather rather than wet weather, wets large areas lightly rather than pooling in one place, and shows as beading on pipes, tanks, ducts and walls. It is a ventilation and dehumidification problem.
Mixed cases are normal, and they are the reason diagnosis is worth doing rather than assuming. A basement can have a slow supply leak and a spring water table problem at the same time, and fixing one will not fix the floor.
Three questions that narrow it down before anyone arrives
Does it happen in dry weather? If yes, it is not surface water. Does it happen when nobody is using water? If yes, it is supply or ground, not drain. Is it worst in July or worst in March? July points at condensation; March points at snowmelt and the water table.
Meter moving with everything off? That's a plumbing leak. Call.
Method
What a diagnostic visit actually does
The meter test. Everything off, watch the meter for fifteen minutes. Movement means water is leaving the pressurised system. This single test separates the plumbing causes from the non-plumbing ones faster than anything else, and it costs nothing.
Isolation. Closing the house main and re-testing tells us whether a confirmed loss is inside the building or out in the buried service line. Isolating hot from cold narrows it further, and isolating branches narrows it again.
Fixture-by-fixture observation. For suspected drain leaks, running each fixture in turn while watching the suspect area is unglamorous and conclusive. Dye in a toilet tank or at a floor drain traces a path where the geometry is ambiguous.
Moisture mapping. Meters and thermal imaging show how far water has travelled through concrete, block and framing, and where it is most concentrated, which usually points back toward the entry.
Reading the evidence on the wall. Staining patterns tell a story. A vertical track down a wall says water came from above. Efflorescence, the white mineral crust on masonry, says water has been moving through the wall over time, which is groundwater rather than a pipe. Rust at the base of a steel column or a bottom plate that has darkened repeatedly indicates a recurring seasonal event.
Camera work. Where a drain line or the lateral is suspect, a camera shows the break directly, see sewer camera inspection.
Seasonal water
Why so many Idaho basements flood in one specific week
There is a week most years, usually a February or March thaw, sometimes April in the mountains, when basement calls spike across the state. It is worth understanding because almost none of it is plumbing.
Snow on the ground has been storing water. When the temperature comes up quickly, that water is released faster than frozen ground can absorb it, so it moves sideways and down along the path of least resistance, which is frequently the disturbed backfill against your foundation. Add rain on snow and the volume multiplies. The result is a wet basement in a house that is dry for the other fifty-one weeks.
In the Panhandle, Coeur d'Alene, Post Falls, Hayden, Rathdrum, Sandpoint, Spirit Lake, this is a defining regional pattern: full basements, wet winters, heavy snowpack and a high water table in places. Sump pumps are standard equipment rather than an upgrade, and the failure that causes the flood is usually the pump, not the plumbing. In eastern Idaho, deep frost means the ground stays sealed longer, so melt water runs on the surface until it finds a low spot, often a window well or a stairwell drain that stopped working.
What genuinely helps: downspouts extended well away from the wall, ground graded to fall away from the house, window wells covered and drained, a sump pump tested every autumn with a battery or water-powered backup where the basement is finished, and snow cleared away from the foundation before the thaw. What does not help: sealing the inside of the wall, which stops the stain rather than the water.
We'll tell you plainly if the fix belongs to another trade.
The one people misdiagnose
Sweating pipes, sweating walls, and a floor that is wet in July
Concrete below grade stays cool all summer. Idaho summer air is hot, and although the state has a reputation for dryness, humid spells and evaporative cooling both put moisture into the air inside a house. Warm moist air meeting cool surfaces produces condensation, and in a basement that means beads on cold water pipes, damp patches on walls, a wet toilet tank, and a general clamminess that people reasonably interpret as a leak.
The diagnostic markers are consistent: it is worst in warm weather and absent in winter; it appears on surfaces rather than pooling from a point; it affects cold pipes and tanks rather than hot ones; and it gets worse when a basement window or door is left open on a humid day, which is the opposite of what people expect.
The fixes are not plumbing, with one exception. Run a dehumidifier with a drain to a suitable point. Insulate cold water lines to stop them sweating, that one is plumbing work and it is cheap. Avoid ventilating with humid outdoor air in summer. Make sure the clothes dryer actually vents outside, because a disconnected dryer duct puts several litres of water a day into a basement and is one of the more common surprises we find.
Boundaries
What the plumber fixes, and what belongs to someone else
Being straight about this is the point of the page. Plenty of money gets spent on interior waterproofing for what was a leaking supply line, and on plumbing for what was a downspout discharging against the foundation.
Ours. Supply and drain leaks anywhere in the building. The water service where it enters. Water heater failures and relief valve discharge. Floor drain and cleanout problems. Sump pump installation, replacement and repair, including backup arrangements. Insulating cold lines that sweat. Sewer laterals, camera work and root intrusion. Anything that involves a pipe carrying water on purpose.
Not ours, and we will say so. Exterior excavation and footing drains. Foundation crack injection and structural repair. Regrading and hardscape drainage. Interior waterproofing membranes and drainage channels around a slab perimeter. Mould remediation and structural drying. Roof and gutter work, which is behind a surprising share of basement water.
The overlap worth naming. A sump pump is plumbing equipment solving a drainage problem, so both trades touch it. We will fit, replace and service the pump and its discharge; if the reason it runs constantly is that roof water is being delivered to the foundation, no pump the plumber installs is the actual solution, and you should hear that from us rather than discovering it in year three.
Order of operations
Fix plumbing leaks first, they are the only source that runs regardless of weather. Then address water management outside. Then dry the structure. Doing those in the wrong order means paying for drying twice.
Sump pump due for a test before the spring melt?
How it runs
A diagnostic visit, in order
The aim is a named source and a costed fix, including the honest answer if the fix is not plumbing.
History and pattern
When it happens, in what weather, with what water use, and how long it has been going on. The pattern eliminates two of the four sources before anyone touches a tool.
Test and map
Meter test, isolation, fixture-by-fixture observation, moisture readings and thermal imaging. Evidence on the walls read for what it says about direction and duration.
Name it and price it
You get the source, the recommended fix and a price for the plumbing part, plus a plain statement of anything that belongs to a different trade.
Coverage
Basements cluster in the north, but not only there
The Panhandle has the highest share of full basements and the wettest winters, which makes this the region where the work concentrates. Eastern Idaho's deep frost produces a different melt pattern, and older Boise, Nampa and Pocatello housing has plenty of basements too. All 82 communities are covered.
Questions
Basement water questions
Weather and water use are the two levers. If the water appears in dry weather with nobody using anything, it is almost certainly a pressurised supply leak, and the meter test will confirm it. If it only appears during rain or snowmelt, it is coming from outside. If it comes and goes with showers and laundry, it is drain-side.
Often not, and we would rather tell you that on the phone than charge you to hear it. Seasonal-only water is a drainage story: snowmelt, a high water table, roof water at the foundation. The plumbing contribution is a working sump pump with a tested backup. The cure is outside the house.
Possibly, and it is worth establishing which part. Condensation on the tank, a weeping relief valve, a dripping drain valve and a failed tank body all look similar on the floor but mean very different things. Water from the body of the tank means replacement, and it can fail suddenly, so that one should not wait.
Both trades touch it. The plumber installs, replace and services pumps, discharge piping, check valves and backup systems, and that is straightforward plumbing work. Whether a pump is the right answer at all is a drainage question, if the reason it runs is roof water landing against the foundation, the pump is a symptom manager, not a fix.
If the problem is condensation, yes, and it will make a noticeable difference, ideally plumbed to a drain so nobody has to empty a bucket. If the problem is an actual leak or groundwater entry, a dehumidifier is treating the smell rather than the cause, and it will run continuously without ever winning.
Efflorescence, mineral salts left behind as water moves through masonry and evaporates. It is useful evidence: it means water has been travelling through the wall itself, which points at groundwater or surface water rather than at a pipe. It also tells you the problem is not new.
Yes. Supply lines run in or under slabs in plenty of Idaho houses, and they are located acoustically and confirmed with thermal imaging before anything is broken. The repair choice, open the concrete at the point, or abandon and reroute the run, depends on access and the condition of the pipe, and you should be quoted both. See leak detection.
For a supply leak, immediately, it runs continuously and the volume adds up fast. For a drain leak, quickly, because of what is in the water. For seasonal groundwater, before the next melt rather than during it. For condensation, at your convenience, though a chronically damp basement is not harmless over years.
Wet after every thaw? Book before the next one, not during.
Name the source before you spend the money.
Four possible causes, three different trades, one honest answer. That answer is a phone call away, and it costs nothing to ask.
(833) 472-2088