Summary
Highlights
Manholes are not required for laid drain pipes of 150 mm diameter. A 'sprinkler system' is described as a system of pipes and equipment used exclusively for extinguishing fires.
A 'lock nut' is a nut screwed tightly against another to prevent loosening. A 'clamp saddle' is a pipe fitting used for the interconnection of service and insertion to the water main. 'Teflon tape' is the material applied to a pipe thread to compensate for workmanship in a screwed joint.
The video concludes by defining a 'seamless pipe' as a steel pipe made by piercing a solid cylindrical steel billet with mandrels while passing it through rollers.
The video begins by asking for the full name of the abbreviation 'DTI' pertaining to local trade and government regulating body, followed by a question about the minimum size of a fire hose outlet for an interior wet standpipe (38 mm).
It then asks to identify which device among the choices is not a plumbing fixture (pneumatic pump) and defines a 'sump pit' as a pit or receptacle at a low point where wastewater drains.
The video explains 'Phantom lines' as thin, dark lines on a plan indicating the scope of movement of a part, like a door. It also defines the recovery rate of a water heater as 'gallons per hour'.
A 'split ring hanger' is identified as a type of hanger used for all pipe positions. The video also lists common copper pipe connections, specifying that 'screwed' is not one of them.
It defines 'rim' as the unobstructed open edge of a fixture and 'air gap' as the unobstructed vertical distance in a water supply system between a faucet and the flood level rim of fixtures.
The greatest stress a material can withstand without permanent deformation after stress release is defined as 'tensile stress'. A 'stack vent through roof' is described as the pipe extension of a solid waste or waste stack above the highest horizontal drain.
For stubborn clogs in water closet traps, a 'closet augur' is recommended. 'Surging flow' is defined as the flow that occurs at the base of a vertical drain where it enters a horizontal drain at high velocity.