UL 70

Please note: All interim revisions for this edition available at time of your purchase will be included.



These requirements cover single and multiple compartment, bituminous-coated metal septic tanks for use i n residential sewage systems.

The minimum liquid capacity of septic tanks covered by these requirements is 500 gallons (1985 L).

For the purpose of these requiremen ts, a residential septic tank is an enclosed, watertight, sewage-settling tank intended to retain the solids in immediate contact with the sewage flowing through the tank for a period of time t o secure satisfactory decomposition of settled solids by biochemical action.

The liquid capacity is the capacity of the tank below the bottom of the outlet when the tank is level.

A product that contains features, characteristics, components, materials, or systems new or different from those in use when the Standard was developed, and that involves a risk of fire, electric shock, or injury to persons, shall be evaluated using the appropriate additional component and end-product requirements as determined necessary to mai ntain the level of safety for the user of the product as originally anticipated by the intent of this Standard.