I have infrequent problems in very heavy rain with sewer backups in my basement. I have a shut off valve on the line that I can operate to restrict the problem, but there have been times with unexpected heavy rains while I was away from home and neglected to close the valve before leaving. Is there a product available that will automatically close that valve in times of heavy rain? A rain sensor? Any ideas?

Thanks!!

M.

Yes a check valve -- they only let fluid flow in one direction. -- Savage

I wll suggest you to find such sewer valve in B2B plateform such as SeekValve (http://www.seekvalve.com/).