Septic repair
A backup or a buzzing alarm doesn't always mean a new system. Here's what septic repairs usually involve in the Flathead.
Plenty of septic problems trace back to one part. The line from the house to the tank plugs, an outlet baffle rots off, a filter clogs, or a float in the dosing chamber hangs up and the pump never turns on. A septic company can track down the cause and tell you whether it's a quick fix or a sign of something bigger.
Common repairs
- Clearing or replacing the sewer line between the house and tank
- Replacing missing or broken baffles
- Cleaning, replacing or adding an effluent filter
- Swapping out a failed dosing pump, floats or control panel
- Replacing cracked lids and adding risers
- Fixing a leaking tank or a damaged distribution line
The pump alarm is going off. What should I do?
- Cut water use right away: hold off on laundry, the dishwasher and long showers.
- Check whether the breaker for the pump has tripped.
- Silence the alarm if it has a button, but treat it as a warning, not a nuisance.
- Call a septic company. The chamber has some reserve space, but not a lot.
Pressure-dosed systems are common in Flathead County because the county required them on new drainfields from 2004 until the 2026 rule change, so pump, float and alarm calls are a big share of repair work here.
Do repairs need a permit?
The county's homeowner handout says not to make repairs without a health department permit. Septic installers working in Flathead County must also be licensed through the Flathead City-County Health Department. If your system is failing, the county asks owners to submit a land research request right away and say so, which starts the process. Your septic company should know which jobs need a permit and handle the paperwork.
Sewage in the house?
Stop using water, keep people and pets away from the sewage, and call. Don't pour drain cleaners or chemicals into the system, since they can kill the bacteria the tank relies on.
Pricing comes from the septic company after it learns about your property and, for repairs or new systems, looks at the site and the county paperwork. We don't quote prices, and a figure given over the phone before anyone has seen the system is only a ballpark.
Where we connect you with help
Common questions
Why does my system act up every spring?
Groundwater in the Flathead Valley peaks in spring, and saturated soil can slow or stop a drainfield from taking water. If problems repeat each year, have the system evaluated.
Can I fix my own septic system in Flathead County?
Repairs generally need a county permit, and installers must be licensed. Homeowners can apply for a self-installer license; call Environmental Health to ask about the process.
Related services
- Septic tank pumping
- Septic inspections
- Drainfield repair and replacement
- New septic system installation
More background: Flathead County septic guide.
Toilets slow, yard wet over the drainfield, or a pump alarm sounding?
Call and we'll put you in touch with a septic company that serves the Flathead Valley.