pauljs75, Thanks for the comments. :) I didn't design the product, but it is made for instances were it is "required by law" to have the storm drain protected in some manner. It isn't just used in curbside situations alone. The Safe Drain is used in a varity of situations which include using it within and around factories that store hazardous chemicals. It is even used at airports and construction sites to control run-off. The company that sells the SafeDrain also services it if the client so wishes. Also, the SafeDrain comes in a varity of forms with different filtration devices for different situations. It is even possible to control and monitor it by remote. And, yes, some forms of the product allow for less maintance. Jeeze, I sound like a bloom'n advertisement for the dang thing. :)