Product Data & Information
All our concrete is constructed with rebar reinforcement,
and reaches a minimum compressive strength of...
Services
Customization
Molds can be modified to match
site needs. Inventory can be cut, core drilled, or patched according to your needs.
Delivery and Placement
When digging the hole, dig about 36” longer and wider than dimensions of
the tank.
WANT TO KNOW MORE ABOUT US ?
M-1 Tanks serves Grant county Washington and surrounding counties.
We specialize in septic systems. We are not designers nor installers.
We do carry an inventory of complete septic system parts including
drain field supplies.
The purpose of this site is to be used as a guide with charts, graphs,
performance curves, dimensions, and product lists.

Feel free to contact our staff professionals for expert advice!
M1 Tanks
SUPPLYING CONCRETE PRODUCTS TO THE
NORTHWEST SINCE 1984
M-1 Tanks - SINCE 1984
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Call for a quote! 509-766-2914
HAVE A PROJECT WITH US? FEEL FREE
Monday to Friday: 7:00 - 4:00 // Saturday/Sunday: Closed
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