Term
| A vertical pipe is any pipe or fitting that makes an angle of 45° or less with the vertical plane |
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Definition
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Term
| Sanitary drainage piping is sized according to the drain fixture unit system |
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Definition
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Term
| Sanitary drainage piping conveys wastewater and waterborne waste from the plumbing fixtures and appliances to the sanitary sewer |
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Definition
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Term
| No more than two water closets made draim into a 3 inch horizontal drainage pipe |
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Definition
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Term
| Properly sized horizontal drainage pipe should be approximately one third full of sewage to ensure proper scouring action |
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Definition
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Term
| Vertical pipes or stacks that empty into horizontal drainage pipes must be sized after the horizontal building sewer and building drain pipe are sized |
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Definition
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Term
| No soil or wait staff is permitted to be smaller than the largest horizontal branch connected to it |
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Definition
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Term
| Soil or we stacks must be offset if the stacks cannot continue vertically over their entire length |
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Definition
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Term
| A one and a half inch pipe is required as a common event for two lavatory traps |
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Definition
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Term
| Since sewer gas is foul smelling a vent terminal should be located at least 10 feet from Windows doors or other ventilation openings |
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Definition
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Term
| Waste pipes are typically size smaller than soil pipes in the building |
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Definition
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Term
| Most plumbing codes require all underground drainage pipes to be at least 2 inches in diameter |
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Definition
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Term
| Vent pipes are size based on drainage fixture units connected to the vent pipe and developed length of vent pipe |
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Definition
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Term
| Negative pressure is pressure less than 1 atmosphere |
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Definition
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Term
| a stack that is offset 45° or less from vertical plane is sized as though it is a straight vertical stack |
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Definition
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Term
| A partial vacuum may develop in the drainage system affecting its discharge capacity |
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Definition
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Term
| Retarded flow in a drainage system is the result of improper atmospheric conditions insufficient venting or in proper fitting installation |
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Definition
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Term
| Common venting is used on two similar fixtures with the same vertical dain heights |
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Definition
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Term
| A branch friend is a vent pipe connecting two or more individual vents with a stack vent or vent stack |
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Definition
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Term
| The storm water drainage system conveys rainwater and other precipitation to the storm sewer or other place of disposal |
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Definition
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Term
| When venting wall hung or cabinet set fixtures such as sinks and lavatories the trap discharges into the side opening of a sanitary drain tee |
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Definition
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Term
| Horizontal drainage piping is graded a quarter of an inch eighth of an inch and 1/16 of an inch per foot length of pipe depending on pipe diameter |
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Definition
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Term
| Any building in which plumbing is installed must have at least one 3 inch or larger diameter stack vent or vent stack extended full size through the roof |
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Definition
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Term
| When drains are installed flashing is installed around the drain body and sealed to the roof to form a watertight connection |
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Definition
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Term
| Rain leaders usually run along a column or are placed in vertical shafts constructed specifically for pipe |
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Definition
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Term
| Projected roof area is the primary factor in determining size of building storm drains and rainwater leaders |
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Definition
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Term
| The international Association of plumbing and mechanical officials developed the uniform plumbing code |
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Definition
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Term
| In addition to being foul smelling sewer gases contain chemical elements that when combined with moist air create acids that corrode vent pipes |
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Definition
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Term
| Roof terminals for vents must be sealed to the roof surface to prevent rain water snow and other moisture around the pipe from leaking into the building |
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Definition
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Term
| Roof jackets or roof flanges are installed around the vent terminals to make the roof watertight |
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Definition
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Term
| The maximum distance between a fixture trap and vent is based on the fixture drain size |
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Definition
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Term
| When sizing offset stacks the portion of the offset is sized first followed by the offset then the portion below the offset |
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Definition
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Term
| Flat venting of water closets should be avoided since stoppage of the fixture drain can result in waste baKing into the vent and plugging it |
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Definition
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Term
| One DFU equals 7 1/2 gallons of water per minute of waste discharge |
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Definition
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Term
| A drainage fixture unit is a measure of possible discharge of waste water and waterborne waste into the drainage system by various plumbing fixtures |
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Definition
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Term
| Discharge capacities for different sizes of horizontal drainage pipes are typically found in plumbing codes |
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Definition
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Term
| In general one branch interval equals one floor of plumbing fixture drains |
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Definition
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Term
| A main event is the principal artery of the vent system to which vent branches may be connected |
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Definition
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Term
| A yoke vent is a type of relief event that provides additional air circulation between drainage and vent systems |
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Definition
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Term
| A four-inch cleanout is typically the largest size cleanout installed in the sanitary drainage system |
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Definition
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Term
| Drainage piping that is less than 3 inches and changes in direction from vertical to horizontal requires a long turn TY fitting |
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Definition
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Term
| A properly installed vent system provides air circulation with sanitary drainage piping and ensures the trap seals will not be subject to a pressure of more than 1 inch of water column |
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Definition
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Term
| The most common individual vent is a continuous vent |
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Definition
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Term
| Soil pipes convey discharge containing fecal matter from water closets or similar fixtures to the building drain or building sewer |
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Definition
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Term
| Changes in direction material and grade affect the discharge capacities of drainage pipes and were considered in design of sizing tables |
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Definition
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Term
| No water closet is permitted to discharge it's waste into a horizontal drainage pipe less than 3 inches in diameter |
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Definition
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Term
| Building sewers must be at least 4 inches in diameter |
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Definition
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Term
| A stack group is a group of fixtures located next to stack so vents may be reduced to a minimum using proper fittings |
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Definition
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Term
| Sewage disposal plants are where sewage treatment process consists of liquefying suspended organic materials |
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Definition
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Term
| Rainwater is relatively clean and can be discharged into a natural drainage terminal such as a drainage basin without negatively affecting the environment |
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Definition
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Term
| Building storm drains convey rainwater from roof drains through a Rainwater leader and into a storm sewer |
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Definition
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Term
| When sizing stacks no water closets are permitted to drain into a stack less than 3 inches in diameter |
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Definition
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Term
| A plumber sizes sanitary drainage vent and stormwater drainage systems based on the number and type of plumbing fixtures and appliances locations of plumbing fixtures and appliances and pipe and fittings available |
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Definition
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Term
| Trap siphonage and back pressure are a result of pressure differences between the drainage system and the atmosphere |
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Definition
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Term
| Storm drain traps should be used when a roof drain body is located within 10 feet of wood door window or any other opening to a building |
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Definition
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Term
| And individual vent is the most practical method of venting a fixture trap because trap seal loss is virtually eliminated |
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Definition
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Term
| Trap seal loss due to back pressure is prevented if fixture drains near the base of the stack or stack offset connect to the horizontal pipe at least 8 feet from the offset |
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Definition
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Term
| A basic wet vent is a common vent with two fixtures who's horizontal drain openings are at different heights and installed back to back |
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Definition
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Term
| vent terminals typically extend at least 1 foot through the roof to prevent rain water on the roof from draining into the terminals |
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Definition
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Term
| Horizontal drainage piping is designed to flow about one third full |
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Definition
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Term
| in cold climates vent pipes passing through the roof should be at least 2 inch pipes |
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Definition
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Term
| A yoke vent is connected to a soil stack with a Y and a 1/8" bend |
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Definition
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Term
| Not more than 4 DFU may drain into a 2 inch wet vent |
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Definition
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Term
| Before applying primer or solvent cement to plastic pipe and fittings check for the proper interference fit |
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Definition
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Term
| Universal solvent may not be used to join all types of plastic pipe and fittings |
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Definition
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Term
| Brazing filler metal is available in several silver phosphorus and copper alloys |
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Definition
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Term
| Bell and spigot cast iron soil pipe joints are mechanical joints made with molded neoprene compression gaskets |
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Definition
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Term
| The American Standard taper pipe thread or in NPT is tapered 3/4" per foot of thread link so that the pipe and fittings will thread together or make up tightly to form a leak proof joint |
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Definition
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Term
| Cast-iron soil pipe ABS and PVC are commonly used for underground drainage and waste pipe |
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Definition
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Term
| Brazing fluxes are water-based to prevent the formation of oxides |
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Definition
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Term
| Compression joint fitthings are used to make above ground connections that may need to be disassembled |
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Definition
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Term
| DWV fittings are used for drain waste and venting applications with types L M and DWV copper tube |
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Definition
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Term
| Steel pipe is available in no hub and Bell and spigot patterns |
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Definition
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Term
| For underground stack bases a brick solid concrete block or concrete must be placed under the fitting at the base of the stack |
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Definition
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Term
| Flared joint fittings are used with K L M type annealed copper tube and are typically used for underground water service applications |
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Definition
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Term
| Malleable iron threaded fittings are tapered with female pipe thread when the fittings are manufactured |
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Definition
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Term
| In steel frame construction clamps maybe used to fasten pipe hangers or supports to the framing members |
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Definition
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