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Interactive Septic TankBy Speedy Septic

Learn About Your Tank!

Click on a component to learn about it's function...

Input Baffle

Where sewage enters from house

Output Baffle

Wastewater goes to drainfield

Sludge Layer

also referred to as the solids layer contains all the solid material that is not supposed to leave the tank or enter any other system components. This is the material that needs to be pumped out on a regular basis.

Inspection Pipe

When pumping two-compartment septic tanks, both sides should be pumped to allow for a complete visual inspection of the tank and baffles.


The scum layer contains the grease, fat, and other non-water soluble materials that go down the drains and toilets.


The wastewater layer, also known as the effluent layer, contains the treated water that has cleared and can safely leave the septic tank to the next step in the septic system.

First Compartment

This is where sewage is processed. Only the clear effluent or wastewater layer should leave and go into the second compartment.

Second Compartment

This compartment contains the effluent filter which helps ensure no solids leave the tank and enter the dosing tank. Once clear effluent or wastewater enters this compartment, it will then go out into the next system component.

Air Space

Septic tanks are designed to leave some room at the top in case of a blockage or in the event a large amount of effluent water comes into the tank. It prevents backing up out of the tank lids or into the home. .

Septic Tank Info Graphic in Portland OR and Vancouver WA

Also Serving Customers In These Regions

Portland Vancouver Metro
Portland OR | Gresham OR | Troutdale OR | Sandy OR | Cascade Locks OR | Clackamas OR | Happy Valley OR | Oregon City OR | Canby OR | Molalla OR | Beaverton OR | Hillsboro OR | St Helens OR | Scappoose OR
The Dalles
The Dalles OR | Hood River OR | White Salmon WA | Bingen WA | Parkdale OR | Mosier OR | Biggs Junction OR | Dufur OR
Hermiston OR | Arlington OR | Boardman OR | Umatilla OR | Irrigon OR | Pendleton OR | Tri-Cities WA | Kennewick WA | Richland WA | West Richland WA | Pasco WA