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The cost-efficient ChamberMaxx system - a corrugated, open-bottom plastic arch system to retain stormwater runoff - stores up to 49 cu. ft. of water per chamber. With a short height profile, the system installs belowgrade to maximize available land for development. The chambers are injection-molded with polypropylene resin and are designed to exceed HS-20/HS-25 live loads in accordance with AASHTO specifications for stormwater chambers, so they can be installed under parking lots and roads. They are also lightweight and do not require heavy equipment for installation. Contech Construction Products Inc. www.contech-cpi.com.

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