On-Site Waste Water

Commercial Septic Tanks

Jensen Precast has been making septic tanks since 1968. We are the largest manufacturer of septic tanks in the Western United States.

Septic tanks are the first vital element of an onsite wastewater treatment system. The septic tank, used in conjunction with one of the many treatment and dispersal options comprises a complete onsite wastewater treatment system.

When you chose a Jensen Precast Septic Tank you get:

Structural Integrity - All Jensen Precast septic tanks are designed by Professional Civil & Structural Engineers based on the expected loading conditions.

Watertightness - All Jensen Precast septic tanks are designed to be 100% watertight. Our manufacturing processes follow detailed & comprehensive quality control procedures consistent with the National Precast Concrete Associations Plant Certification Program. Inlet and outlet pipe connections are all gasketed.

Guarantee - Jensen Precast guarantees the structural integrity of our septic tanks for five years. We guarantee the water tightness of our septic tanks for one year. This far exceeds industry standards. Standard conditions apply.

Uniform Plumbing Code (UPC) Accepted - Jensen Precast septic tanks are listed in the Uniform Plumbing Code (UPC) published by International Association of Plumbing and Mechanical Officials (IAPMO).

ASTM C1227 Standard Specification for Precast Concrete Septic Tanks Compliant - Jensen Precast septic tanks are designed and manufactured in accordance to the stringent and comprehensive requirements of this national standard.

Availability, Sizes, & Delivery - Jensen Precast has the largest selection of septic tanks sizes available anywhere. We keep a large inventory of septic tanks in stock which allows for fast delivery anywhere in our market area. Our fleet of boomtrucks makes installation quick and easy. 

Unlimited Storage and Capacity - Jensen Precast grease interceptors are available for any capacity needed.  Our production methodsmake it possible for us to make a Grease Interceptor for any application imaginable.

 Accessories: Effluent Filters, Lids & Risers, Leaching Chambers, & Carbon Filters - With a few simple & cost effective accessories added to your septic tank you can significantly lower your long term costs of ownership. The addition of an effluent filter in the septic tank is an extremely economical and simple addition to extending the life and effectiveness of any treatment system. Risers & aesthetically pleasing lids allow easy inspection, pump-out access and cleaning. Carbon filters are effective at reducing sewer gas odors on vents. Leaching chambers can in many cases reduce the size of leachfields by increasing efficiency.

Treatment & Dispersal Systems - Jensen Precast is a complete line supplier of numerous septic tank treatment systems, parts, components, and accessories. Pumps, control panels, sand filters, AdvanTex textile treatment systems, and much more.