Plumbing Flashcards
What causes water hammer ?
- loose pipes
- instantaneously closing valves
- hydrostatic shock
A copper-to-steel connection undergoes a/an?
Electrolytic reaction
Name three common locations of cross connections in a plumbing system.
Bidet
Garden hose
Broiler connection
Name two locations to install a check valve in a house with a combination sewers to reduce the risk of backup into the basement
Floor drains and main drain line
The recommended slope for waste plumbing is typically ?
1/4” per foot
What type of trap is no longer used in residential construction ?
S-trap
Describe the function of a trap primer
To add water to the trap to replace water lost through evaporation.
The most common clue to venting problem is?
Sewer odor
Gurgling drains
Slow drains
A vent pipe does binned to extend past the attic .T/F
False
What is the minimum diameter and extension above the roof line of a vent pipe to prevent frost/snow closure?
3inch diameter and 6 inch above snow line
What is a wet vent ?
A vent that also serves as a drain
Describe a French drain or dry well
A buried gravel pit designed to allow water to accumulate quickly and dissipate slowly by soaking into the soil
A temperature pressure relief valve on a water heater that is installed above the tank in the pipe is wrong why?
Must be installed within the top 6 inches of the tank.
Temperature /pressure relief valves are typically rated at ?
150 psi and 210F
What is maximum length of a flexible gas appliance connector to a dryer or range ?
6 feet
How do you check if a shower door had safety glazing ?
Marked in the corner
If a natural gas appliance is changed to LP gas , you need ?
A smaller orifice
How much water does a modern residential toilet discharge into the waste system?
1.6 GPF
Cooper and galvanized steel can be joined by what method?
Brass converter fitting
Di-electric union
A flexible appliance connector can be cut?
False
Two 3 foot appliance connectors can be connected to make a 6 foot connection .T/F
False
What kind of connector is needed to attach plastic DWV to cast iron DWV?
Hubless
Gas water heaters are allowed in all of the following locations except?
Laundry rooms open to the living area
Plumbing vent must terminate at least?
10 feet from window and 6 inches above roof
