Berg Vault

Berg Vault

Septic Tanks and Supplies

We manufacture concrete septic tanks and offer plastic septic tanks as an alternative to concrete for those tough to reach sites.

We also offer a full line of on-site septic system components from the septic tank effluent filter, pump and pump controls to the piping and gravel-less drainfield chambers.

Our concrete tanks are currently approved in the following Washington State counties: Island, San Juan, Skagit, Snohomish & Whatcom. Our Norwesco brand plastic septic tanks are approved by Washington State.

Please contact us for a quote.

Plastic Water Tanks

We stock Norwesco brand polyethylene plastic water tanks for both above and below ground use. We also stock Norwesco tanks from 35 gallons to 525 gallons for the transport of potable water.

Our Norwesco water tanks are NSF International approved under NSF/ANSI Standard 61 for potable drinking water.

Please contact us for a quote.

Access Risers and Lids

We offer one piece access risers and green locking gasketed access lids for concrete tanks.

Septic tank access risers are a time and money saver. Easily access your tanks for the county required inspections, no guess work or digging required.

Please contact us for a quote based on the height and quantity needed for your particular septic system.

Septic Tank Measurements
Precast Concrete
Tank Drawings

A septic tank is the first component in an on-site septic system and is critical in the proper treatment of your wastewater. 

We manufacture concrete septic tanks and offer plastic septic tanks as an alternative to concrete tanks. 


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Contact Info


Phone: 360-424-4999
Fax: 360-424-5839

We are conveniently located in Skagit County at:
2308 Cedardale Road, Mount Vernon, WA 98274

Our mailing address is:
Berg Vault Company, PO Box 1205, Mount Vernon, WA 98273


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