509-766-2914
Mon-Thu: 7-4, Fri: 7-3 (Nov-Mar), Sat/Sun: Closed
13058 N Frontage Rd E, Moses Lake, WA 98837
M1-Tanks
M-1 Tanks Facility
Washington State Approved

Why Choose M1-Tanks

Experience unmatched quality in precast concrete and wastewater solutions, delivering durability and performance that stands the test of time.

Built to Last

  • Controlled conditions = superior quality
  • Precision and consistency
  • Efficiency and cost savings!

Delivery & Placement

  • Ready when you are
  • Efficient & precise placement
  • Reduced site impact

Custom Solutions

  • Molds can be modified to match site needs
  • Inventory can be cut, core drilled, or patched according to your needs
  • Custom projects in 3–5 weeks

Product Catalog

Explore our comprehensive range of high-quality precast products and septic systems designed for durability and performance.

Quality Service, Lasting Impact

M-1 Tanks was founded in February 1991 by Jim and Deni Morgan in Grant County, initially with just one septic tank mold. Over the years, we've expanded our offerings to include a diverse range of products like manholes, concrete steps, and various pipe products.

Our growth has been marked by our move to a new location in 2007, allowing for significant expansion. As Jim Morgan reflects, "This business was started and continues with God's leading," embodying the principle from Philippians 4:6-7:

"Do not be anxious about anything, but in every situation, by prayer and petition, with thanksgiving, present your requests to God."
30+
Years of Excellence
Serving with Integrity Since 1991
M-1 Tanks Team

What Our Clients Say

Hear from customers who trust M-1 Tanks

Easiest review I've ever done... From owners to bookkeepers to drivers to shop managers….everyone cares. They make the installers job really easy. They really do. Jim has walked me through multiple different designs and got me lined out and ready to go. Great team and very consistent.

Jake Gann

Gann Construction

I have been using M1 Tank products for over 25 years. I have never had a problem with any products or service. They are one stop shop when delivering septic systems to the job site. The time savings they bring to the job (all the material to complete a septic system) means I don't have to run around and find it at other pipe stores. If all companies ran this efficiently my life would be easier.

Steve

Desert Winds, Inc.

M1 tanks has been more than helpful. Their product and service it's truly above and beyond. I can't say enough good things about the staff and the owner. Always willing to help and adjust schedules when needed. Jim is so full of knowledge. M1 will always be my go to supplier for septic tanks and materials.

Tyler Throm

Throm Custom Dirtworks, LLC

Frequently Asked Questions

Find answers to common questions about our products and services.

What types of septic tanks do you offer?

We offer a complete range of WA state-approved septic tanks, including standard residential tanks, commercial systems, and custom solutions. All our tanks meet or exceed state regulations and documentation is available upon request.

Do you provide delivery services?

Yes, we offer delivery services throughout the Pacific Northwest. Our experienced team ensures safe and timely delivery of all products to your job site, with proper equipment for placement.

What quality standards do your products meet?

Our precast concrete products are manufactured under controlled conditions with rigorous quality control measures. We use high-strength concrete mixes and reinforcement that meet or exceed industry standards for durability and longevity, ensuring our products will perform reliably for decades.

Can you create custom precast solutions?

Absolutely! We specialize in custom precast concrete solutions. Our team will work with you to design and manufacture products that meet your specific requirements and specifications.

What is your typical production timeline?

Production timelines vary by product. Standard items are often available immediately from stock. For custom orders that can be completed in-house, we can typically complete and deliver within 3-5 weeks. If we need to order special parts, custom work will take longer. Contact us for specific timeline information for your project.

Do you provide installation services?

While we don't provide complete installation services, we are equipped to set our structures in pre-excavated holes or unload in a designated place. We can also provide detailed installation guidelines for all our products.

Don't see your question here?

Contact Our Support Team

Ready to Start Your Project?

Get in touch with our team for expert guidance on your precast concrete needs. We're here to help bring your vision to life.