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the interval distance from the "Grade Line"to the highest point of the coping of a flat roof or to the top line of a mansard roof or to the average height of the highest gable of a pitch or hip-roof.
Height of Building
is a drain pipe extending laterally from a soil or waste stack or building draing with ot witohut vertical sections or branches, which receives the discharge from one or more fixture drains and conducts it to the soil or waste stack or to the building drain.
Horizontal Branch
is any pipe fitting installed in a horizontal position or which forms an angle of not more than 45 degrees with the horizontal plane
Horizontal Pipe
is that part of the lowest horizontal piping of a plumbing system which receives the discharges of soil, waste and other drainaige pipes inside of a building and conveys it to the house sewer outside of the building.
House Drain
is that part of a plumbing system extending from the house drain at a point 0.60 meters from outside face of the foundation wall of the building to the junction with the street sewer or to any point of discharge, and conveying the drainage of one building site.
House Sewer
is the pipeline from the building to the public or street storm drainage system
House Storm Sewer
are cast iron soil pipes with plain ends connected together with bolted stainless steel bands and neoprene gaskets.
Hubless Pipes
is a pipe that does not connect directly with the drainage system but conveys liquid wastes by discharging into a plumbing fixture, interceptor or receptacle directly connected to the drainage system.
Indirect Waste Pipe
is a pipe installed to vent a fixture trap and which connects with the vent system above the fixture served or terminates in the open air.
Individual Vent
any and all liquid or water-borne waste from industrial or commercial processes, except domestic sewage.
Industrial Waste
means Iron Pipe Size.
I.P.S.
a condition contrary to sanitary principles or injurious to health.
Insanitary
isa device designed and installed to separate and retain deleterious, hazardous or undesirable matters from normal wastes and permits normal sewage or liquid wastes to discharge into the disposal terminal by gravity.
Interceptor (Clarifier)
the lowest portion of the interior part of any pipe or conduit that is not vertical.
Invert
the administrative authority under the Department of health, the Department of works and highways, the department of interior and local government, the city mayors and chartered cities, environmental management bureau (D.E.N.R) and other government entities that regulate the practice of registered and licensed master plumber.
Jurisdiction
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