| www.pmmag.com Plumbing & Mechanical Online |
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| www.valvulas-var.com.co prevent backflows in any type of sewage system. An efficient alternate solution where check or flap valves are not appropriate. |
American
Society of Sanitary Engineering |
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| http://www.petersonvalve.com Now you can protect your home from expensive damage caused by wastewater backups while controlling expensive installation costs, maintenance and problems associated with typical waste backwater valves. |
There is a other company called General Wire and Spring aka General Pipe Cleaners that has something that will work on 2� floor drains http://www.generalpipecleaners.com/ they do not have it listed on their web site but they do sell it, call and ask them | Drinking Water & Backflow Prevention Magazine |