We are installing a toilet in our basement and the drain pipe has a very small incline to the outside city sewer. Hence as per city regulations, we need to install a backflow valve to prevent he flow back into the house in case of city sewer flooding. All of that makes sense to me.
Now here is my problem - the city is also asking us to install a relief valve and an overflow tank with an alarm. The reason? They are concerned that if some one flushes the toilet in the unlikely event of city sewer flooding, there is a risk (however small) that the sewage will flow back into the house (not good!). Unfortunately the overflow tank with a built-in alarm is pretty expensive ($700-800).
Question - Does anyone know of a cheaper but equally effective solution? I should add that installing an overflow pipe to the outside of the house is not a feasible solution.
Thanks in advance
Now here is my problem - the city is also asking us to install a relief valve and an overflow tank with an alarm. The reason? They are concerned that if some one flushes the toilet in the unlikely event of city sewer flooding, there is a risk (however small) that the sewage will flow back into the house (not good!). Unfortunately the overflow tank with a built-in alarm is pretty expensive ($700-800).
Question - Does anyone know of a cheaper but equally effective solution? I should add that installing an overflow pipe to the outside of the house is not a feasible solution.
Thanks in advance