Septic Tanks

For more than 50 years, Willamette Graystone has manufactured concrete septic tanks. As a licensed distributor of Orenco Systems products – the industry innovator in wastewater filtration products – you can be assured that you're getting the highest quality product possible.

We manufacture septic tanks for gravity systems, dose tanks for pumping systems, oil/water separators, grease interceptors, sand filter systems, and tanks for various special purposes.

Each of our seven retail stores also stocks a full line of Orenco products, including pumping systems, effluent filters, residential sand filters, manhole risers and lids, as well as a full line of tank accessories.