UltraTech self bailers allow you to passively filter hydrocarbons from stormwater in outdoor containment products. The best protection from non-monitored containment sites. They help eliminate problems associated with the collection of rainwater in outdoor containment products. This unit is simple to install, and can be connected to any outdoor containment product. Modest spills and hydrocarbon "sheens" are captured, and larger or more concentrated spills will activate an auto-shut off mechanism. There is also a manual shutoff valve which can be used to secure all draining operations. The filter cartridge do need to be replaced, and the stormwater drain has to be cleaned through the outflow port.