the unobstructed vertical distance through the free atmosphere between the lowest opening from any pipe or faucet supplying potable water is called

pressure relive valves for hot water heaters shall be set to blow of at the maximum working pressure rating of the water heater but not to exceed

this is a condition which develops on the interior of a pipe due to corrosive materials resulting in the creation of small lumps on the inner walls of the pipe

a device used to protect the quality of water, fail safe in design, securing the potable water system by isolating a heat exchanger when the pressure between the potable water and the heat exchange medium drops below a preset level is called

a combination waste and vent shall be permitted

the maximum number of drainage fixtures units on a 4" horizontal branch drain installed at a 1/4" per foot slope is

the vertical distance between the crown weir and the top dip of the trap is called

in a potable water supply tank, the water supply inlet to the tank shall have a minimum air gap of at least _______ inches

the minimum size vent through any roof is

the relief valve element must extend

all vent and branch vent piping shall have a minimum grade of ________ and connected as to drain back to the soil oe waste pipe

a double fire hose connection that runs from outside the building wall through a gate valve and a check valve to the fore stand pipe is called

the minimum size clean out plug for 4" pipe is

each structure in which building drains are installed shall have one stack vent not less than _____________ inches in diameter carrried full size through the roof to the outside atmosphere for each building

plumbing systems are designed to prevent a pressure differential no greater than

how many drainage fixture units may be put on a 2" horizontal drain?

adding a backflow device to a water supply system creates a/an

what is the D.F.U for a 2" fixture drain or trap?

no piping shall be laid parallel to footings or outside bearing walls closer than

where potable water supply piping must cross a sewer line below grade, a vertical seperation of ______ is required

commercial dishwashing machines and similar dishwashing equipment using hot water for sanitizing shall be provided with a sufficient supply of hot water at

the activating handle of a flush valve in public restrooms shall be a minimum of ______________ above the flood rim of the bowl

A pipe connecting upward from a soil or waste stack to a vent for the pupose of preventing pressure

what is the maximum number of water closet allowed on a three inch horizontal waste pipe

sumps receiving the discharge of more than ___________ water closets shall be prvided with duplex pumping equpment

where a roof is to be used for any purpose other than weather protection, the vent extension shall be run at least _________ above the roof

where is the trap located on a bath water typ "P" trap is used

the vertical distance from the fixture outlet to the trap weir shall

a residential dishwashing discharge

when backfilling a trench, until the crown of the pipe is covered by atleast _________ of tamped earth cre shall be excercised in backfilling trenches to ensure that the pipe beneath is secured

no portion of the drainage system installed underground or below a basement or cellar shall be less than __________ inches in diameter

the minimum service pressure for a direct flush valve

no steam pipe shall connect to any part of a drainage or plumbing system, nor shall any water ____________ degrees be discharged into any part of the drainage system

soil and waste stacks in buildings having more than ten branch intervals shall be provided with a ________ at each tenth interval installed, beginning with the top floor or may be installed midway between the first and twentieth interval

vent connecting to the drain pipe through a fitting at an angle not greater than 45 degrees to the vertical is called

the minimum service pressure at the point of outlet discharge for all fixtures except direct flush valves shall be

saddles to connect ice makers for refrigerators

floor drains shall be trapped and have a minimum water seal of

where commercial food waste grinders are utilized, the waste shall discharge

a solar heated system shall use a double walled heat exchanger which is exposed or double walled to the atmosphere between walls

for a continous or semi-continous flow into a drainage system, such as from a pump, ejector, or similar devices, ___________ fixtures units(s) shall be considered to be equal to each gallon per minute of flow

the minimum size supply line for a water closet with a flush valve shall be

sanitary waste, gray water or mixtures containing harmful substances including but not limited to ethylene, glycol, hydrocarbons, oils, ammonia refrigerants, and hydrazine is called

this type of venting only applies to floor drains and floor outlet fixtures which depend on siphonage for proper operation

when strict water main pressure exceeds 80 psi, what must be installed before the water service enters or ties into the building water distribution system

horizontal drainage piping of three inches in diameter shall be installed with a fall of not less than _____________ inch per foot

the maximum developed length of a dead end in a water supply system allowed is

a cleanout shall be provided at, or no more than_________feet above the base of each vertical waste or soil stack.

a fixture unit drainage is the mathematical factor used by the plumbing industry as a means of estimating the probable load in the drainage system cause by discharge of various plumbing fixtures. note: laboratory test have shown that the rate of discharge of an ordinary lavatory with a normal 1 1/4" outlet trap, and waste is about___________ gallons per minute

drinking fountains or devices shall not be installed