The other advantage is the weight capacity

That’s why it’s not a good idea to deal with them unprotected

includes auto drain

Air Systems Pre-Filter

Back Plate

Ultra-Spill Berm® call for quote The other advantage is theTemporary spill berm seals off spills from the environment, nearby drains and doorways Many storm drains empty directly into waterways making them a key area to protect in the case of a spill. The Ultra Spill Berm is a quick and easy to deploy spill response product that will divert hazardous material away from drains and other sensitive areas. Applications include: Spill response Temporary secondary containment Sealing off of doorways during washdown