Why risk not being able to block a storm drain in time or at all to prevent hazardous spill, leak, or natural run-off contamination? …If you can quickly and easily close the storm drain, regulate the amount of flow through it, and even filter the liquids flowing through it with a Safe Drain®.
The Safe Drain® is a patented product (Patent Numbers: 5,383,745; 5,582,720; 5,728,294) and is protected by other patents and patents pending.
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