It depends how much back pitch there is
The sewer
Yes, there are things that you can do to stop the sewer from backing up in a rainstorm. For example, you can use a floor drain standpipe, a backup valve, a floor drain plug or an overhead sewer.
Size of any drain is calculated by fixture units (7.48 gallons) and pitch of pipe with many codes giving a bare min sizes
If you are talking about a roof water drain pipe to sewer it is illegal. If you are talking about a sink drain pipe well that is where they all connect to so yea.
It depends how much back pitch there is
the sewer is where things that you flush or put down the drain go, a drain is the opening is a sink or shower that sends things to the sewer
Blocking drain and sewer lines in a home is a common problem, so you don't have to worry too much about it, you can just take a camera inspection service by a professional to get an accurate estimate of what they are. reason. If your home's drain line is blocked, you can contact a Tacoma WA plumber for a drain and sewer camera inspection service.
You hire a plumber to put in a one way sewer drain valve.
Affordable Plumbing & Drain Cleaning is your premier choice for sewer and drain service contractors. www.affordabledraincleaning.com
a drain more than likely goes to a sewer.
lets just say alot
use a rope on it and talk to that guy with you in the sewer
The sewer
hire a plumber
That would depend on the fixture load and the pitch of the line and the local codes as far as connecting to the public sewer /storm system
The building code where I live requires a drain pipe to slope approximately 1/4 inch per foot (+ or - 1/8 inch). The recommended pitch for a 50 foot drain would be 12-1/2 inches.