Should a backwater valve be installed on the building drain beginning at the lower level to prevent sewage backflow for all fixtures?
What will be an ideal response?
No, only the fixtures lower than the public sewer’s manhole overflow level must be protected.
You might also like to view...
A geothermal well needed 
?lbs, of grout to complete the 
ft. well. How much grout was used per foot of well?
Fill in the blank(s) with the appropriate word(s).
Which list states the correct order of equipment for the vapor compression cycle?
A) Condenser, then compressor, then evaporator, then expansion valve. B) Expansion valve, then evaporator, then compressor, then condenser. C) Compressor, then expansion valve, then evaporator, then, condenser.
A relay with heavy-duty contacts is called a ____.
A. contactor B. latching relay C. pilot-duty relay D. time-delay relay
Training for workers in underground construction must cover what topics?
What will be an ideal response?