This economical containment for 275 (Part #2800 and 2801) and 550 ( Part # 2823 and 2820) gallon fuel and oil tanks is constructed of 100% polyethylene and will not rust or corrode and provides superior chemical and weather resistance. An optional 3/4” drain fitting is available. Use this unit with the optional Ultra-Self Bailer Part # 9935) for outdoor containment. This unit meets Stormwater, SPCC and EPA Containment Regulations. The Ultra- Self Bailer helps eliminate problems associated with the collection of rainwater in outdoor containment products by allowing clean stormwater to passively drain from the sump while capturing hydrocarbons. Larger or concentrated spills activate an ‘auto-shutoff’ mechanism. A manual shutoff valve can be used to secure all draining operations and to change out the filter cartridge.