Master Plumber Exam - National Plumbing Code of the Philippines

Sewage Ejector

Type of pump that discharges waste in the sump pit and transfers the waste to the house drain. (Max Fajardo)

503 mm

Minimum dimension of a septic tank manhole.

Industrial drain

drain that discharges objectionable waste such as acids and other chemicals from industrial equipment .

75 mm

Minimum diameter of pipe of any water closet.

3

Maximum number of water closets able to discharge into a shared 75mm diameter horizontal soil branch

Combination Sewer

Type of sewer that discharges both storm water and sewage from households, rendered obsolete due to the health hazards it poses

Septic Tank

Airtight receptacle used to expedite the decomposition of elements contained in raw sewage, usually located 1.5 meters from the property line and 15.2 meters from the water main or any potable water source. It is comprised of two chambers that contain anaerobic bacteria that break down wastes.

Sedimentation

Term defined as the settling down or separation of solid matter suspended in a liquid.

1%

Minimum slope or grade (in %) permitted with 100mm (4'') pipes.

Scum

Lighter organic solid particles found in sewage, cesspools and septic tanks, found floating on the liquid.

Sludge

Term defined as the organic particles that have settled down in septic tanks, cesspools or sewage.

900 mm

Minimum WIDTH of a septic tank for residential dwellings. (mm)

1500 mm

Minimum LENGTH of a septic tank for residential dwellings. (mm)

1200 mm

Minimum DEPTH of a septic tank for residential dwellings. (mm)

Hair

Leading cause of pipe clogs in waste and soil pipes.

Drainage, Waste and Vent

Definition of DWV

Acrylonitrile butadiene styrene

Definition of ABS

Oval

Cross sectional shape of the interior of Polybutene pipes (PB).

38 mm

Minimum size of cleanouts. (mm)

Corporation Stop

Type of valve found in the service main, used as a control of the water service and shut off valve when service is disconnected.

Check Valve

Type of valve used to prevent backflow or reversal of flow of water, usually found after the water meter.

Union Patente

Fitting used to describe the connection of the service pipe and water meter. Usually used as the demarcation between the property of the water service and water supply pipe system residential dwelling or building.

Booster Pump / Pneumatic Pump

Type of pump used to distribute water within a building or residence, when an upfeed system cannot provide adequate pressure to supply fixtures with potable water.

Durham System

Type of piping system that is characterized by threading and connecting cast iron pipes in the building.

Teflon Tape

Material used to fuse joints or connections of GI pipes.

Caulking

Process of joining the joints and connections of cast iron pipes.

Motor Oil

Type of oil used when threading GI pipes.

Centrifugal Pump

Type of pump used for high-rise or mid-rise buildings, when booster or piston pumps are unavailable or inadequate.

Piston Pump

Type of pump used for residential or low-rise buildings, and comes in single action, double action or twin.

Drum Trap

Type of trap that is installed only in bathtubs.

Flushometer Valve

Type of flushing valve used in commercial water closets, usually installed with a pressure tank that expels air pressure and a set amount of water when flushing.

14

Number of teeth per inch in a hacksaw blade used to cut GI pipes.

Looped Vent

Type of vent used in an island counter type kitchen sink.

Trap Seal

Maximum vertical depth of liquid that a trap can contain.

Sump Pit

Type of detention pit usually found in basements, used to gather and discharge waste water, sometimes with the help of a pump.

Standpipe

Vertical pipe that is used for the storage of water, usually contains pressure and is used for fire suppression.

Return Bend

Type of pipe with a 180 degree bend.

2

Water Supply Fixture unit of a bath tub.

2

Water Supply Fixture unit of a shower

38 mm

Diameter of pipe used for bath tub drum traps. (Max Fajardo, p. 172) (mm)

38 mm

Diameter of pipe used for wash basins / lavatories. (Max Fajardo, p. 172) (mm)

75 mm

Diameter of pipe used for water closets. (Max Fajardo, p. 172) (mm)

50 mm

Diameter of pipe used for floor drains. (Max Fajardo, p. 172) (mm)

Bleeder

Type of connection found in a looped vent, connecting the looped vent pipe to the waste pipe.

50%

Percentage required of liquid flow for a waste or soil pipe to have adequate drainage or discharge.

Circuit Vent

Type of vent that connects a battery of fixtures to a stack vent.

Privy

A concrete sealed vault with a wooden shelter constructed for the collection of raw sewage.

Cesspool

Hole in the ground curbed with stones, bricks, CHB or other materials to allow raw contaminated sewage to leach into the ground.

Trap Seal Loss

A common problem in traps due to inadequate ventilation.

Unit Vent

Type of vent that is shared by two fixtures of the same type.

Solvent System

Type of system used in plumbing that eliminates the vent stack, relying of downward pressure and suction.

The waste and sewage discharges form slug-like (bullet) pressings or pressure.

volume/flow rate

Formula for detention time of a tank