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20 Years of Service and Quality

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Septic System Services

Areas We Serve

  • Clark County, WA
  • Battle Ground
  • Camas
  • Hazel Dell
  • Orchards
  • Ridgefield
  • Vancouver
  • Cowlitz County, WA
  • Castle Rock
  • Cougar
  • Kalama
  • Kelso
  • Longview
  • Woodland
  • Yale

Do I need a septic system?

Septic systems are used in areas where a community sewage system is not available. Check with your local authorities to find out if you have a sewer in your area. If not, you'll need a septic system. Unless, that is, you're content with an outhouse.

4 pipes in parallel, sunken into the dirt, and snaking into a forest

What types of septic systems are there?

The modern septic system has come a long way from a ditch and a pipe. We can install everything from basic septic tank and drainfield septic systems to the most advanced pre-treatment alternative septic systems. Here is a partial list of some of the septic systems we can install with links so you can learn more about them.

  • AdvanTex - Pretreatment filteration system - we are an AdvantTex-certified installer
  • NuWater - Aerobic treatment unit - we are a BioRobix-certified installer
  • Glendon BioFilter - Upflow pretreatment system - we are a Glendon BioFilter licensed installer
  • White Water - Aerobic system (no certification required to install)
  • Norweco

Here is some other good information about septic systems.

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Perc/Test Holes (Septic Test Pits)

Test pits (commonly called perc holes) are needed to determine what type of soils are at your property and to determine the depth to the restrictive layer. We do not provide the soils analysis aka "perc testing", but we can refer you to several good septic system designers who provide this service if you contact us!

What's wrong with my septic system?

There are many things that can go wrong with a septic system. If you have a problem, take a look at our Frequently Asked Questions page.

What if I currently have a septic system and want to convert to a city or county sewer?

We can do septic-to-sewer conversions. Take a look at our septic to sewer conversions page.

View our On Site Septic Systems (OSS) page to learn more information about these septic systems.

Can you recommend a good septic designer?

You bet we can! We've been working in the industry for 20 years, and have experience with many of the best septic designers in the area. Check out the lists below.

Have questions about your septic system? Check out our FAQ.

Get a bid!

Seppanen Construction, LLC
La Center, WA
(360) 263-7950
Washington: SEPPACL974JC