Question

a trap seal is
the fastener that joins the trap to the tailpiece
the fitting that joins the trap to the trap arm
another name for the drain stopper
the vertical distance from the trap dip to the weir
the connection from the trap to the vent
question 30
sewage sumps are required for toilets
located below the elevation of the curb at the street
located below the municipal sewer
located in the basement
installed in underground structures
located in a home with a septic system

Explanation:

A trap - seal is defined as the vertical distance from the trap dip to the weir. This is a standard definition in plumbing. For sewage sumps, they are required for toilets located below the elevation of the curb at the street because the waste needs to be lifted to reach the main sewer line.

Answer:

1. the vertical distance from the trap dip to the weir
2. located below the elevation of the curb at the street