Can 3 tab asphalt shingles be installed on a 2/12" pitch roof?
Yes, but only if there is two layers of felt paper.
What two locations is a check valve typically installed to prevent sewer backup into the basement?
Floor drains &
Main drain line
What is the minimum diameter and extension height above the roof line of event pipe to prevent frost /snow closure?
3" diameter &
6" above snow line
In addition to a di-electric coupler, copper and galvanized steel can be joined by a brass converter fitting?
It is okay to have a non-grounded receptacle within 6 inches of water?
False, all receptacles around water should be GFCI protected!