Recently had a sewer backup in our basement and wanted to install
backflow prevention valve (regular Home Depot special....put it in
drain, tighten screws to expand rubber gasket and voila!)
However, my floor drain (4" clay pipe) has another small rubber 'hose'
which feeds into it from just below the concrete floor. I am told this
hose feeds water into the trap to keep sewer gases from getting into
My problem is that I cannot install the backflow preventer because the
little hose prevents a uniform seal between the valve and the edge of
the drain. Is there an alternative method, device that I can use on
this drain opening (without major cost/tearing up the floor)?