How to Install a Flood Control System | This Old House

Keeping sewage at bay with This Old House host Kevin O’Connor and plumbing contractor Dennis Langowski. (See below for a shopping list and tools.)
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Shopping List for Installing a Flood Control System:
– cast-iron, twin check valve
– ready-mix concrete
– gravel and sand
– rubber couplings
– curved pre-cast concrete blocks
– buckets and rope

Tools for Installing a Flood Control System:
– pointed shovel
– sledgehammer
– nut driver

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How to Install a Flood Control System | This Old House
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View Comments

  • That old check valve is so flimsy and can't compare with modern systems.

  • So since they concreted in the cast iron if it ever fails they have to jack hammer it out?

  • Forcefully pumps sewage into an already blocked sewer line? Seems like a good idea.

  • modern product is so weak, flimsy and cheaply made. I think capitalists wants us rebuy from them every year.

  • OMG, that’s terrible to see the LEAD water service pipe there and it’s Not replace it!!!!!!!!!

  • Does anyone notice that they're illegal as hell with no trench shoring?

  • Not Code in Chicago. Typical find in Chicago. This woman is highly misinformed. A little knowledge is dangerous for some people. (yes that was an insult) Poor and incomplete presentation and installation. Why? The system you present is only a backwater preventing system(double check valve). The home owner cannot use water in the home during a flooding situation because is will back out of the basement gravity sewer drain as it has no where to go. They must have an overflow, a sump basin at the bottom no smaller than 20" x 40" with a 2" ejector pump at the bottom to force domestic waste water from the vault basin into the city system. I have been in the flood control business for 40+ years and have installed thousands of flood control system in Cook County alone. Parks usually hires my rejects. In that neighborhood, overhead sewers would have cost more, but would be a much better option.

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