Section 7-House Sewers and Storm Water Flashcards
DWV and plumbing system that is new shall be ________ and _____ of other buildings and the building shall have a(n) ____________ connection with the sewer
separate and independent
independent
A building sewer may serve addition buildings and still be considered as one sewer if the additional buildings are
used in conjunction with the primary, contained within the same deed as primary, restricted within the deed form being sold separately as primary building
An excavation for a sewer shall be _______ work and shall be _________ until
open trench work, kept open, it has been inspected, tested, and approved
The sewer shall be at a _______depth to ______
sufficient, properly serve a plumbing connection installed in the basement
A house sewer shall be laid on a grade of
not less than 1/8 in nore more than 1/4 per foot
A sewer shall have at least ______ of cover
18in
Sewer piping installed under property subject to vehicular traffice) shall have at least _______ of cover unless
24 in
sch 40 or 80 cast iron encased in a min 6in of concrete on each side and top and covered to prevent direct contact with concrete
Sewer shall be backfilled by hand and _________
tamped 6in above or filled with 6in grillage above.
If less than 18 in of cover is available what should be done
a request for a variance submitted to the division in writing
A house sewer or combined sewer shall be made of ….
extra heavy and service weight CI, vitrified clay, concrete, PVC or ABS, Cell core PVC or ABS, Truss pipe, extra heavy SDR 35, type PS 46, PVC sizes 4in-15in, PVC ribbed and coextruded composite, PE
A storm sewer inside a building extending 2ft outside in sizes 8in and smaller shall be made of
CI, aluminum, sch 40 ABS or PVC DWV pipe
A storm sewer size 10in or larger shall be made of
CI, aluminum, schedule 40 ABS or PVC DWV pipe, SDR 35, vitrified clay or contrete, PE
Roof drain shall have _______ extending not less than _____ above the surface of the roof immediately adjacent to the roof drain and shall be no less than ______ the area of the conductor or leader
strainers, 4 in
1.5 X
Roof drain strainer on _____________ may be of the flat surface type, installed ____ with the deck , with inlet area not less than _____ the area of conductor or leader
sun decks, parking decks or similar
level
2X
Secondary (emergency) roof drains shall be provided where and what is required for them
the roof perimeter construction allowing ponding if primary roof drains become blocked
requirements: piping and point of discharge separate from primary, discharge above grade plane in location normally observed by building occupants or maintenance personnel
Primary and secondary roof drains shall be sized according to
size of storm systems table
Change of direction of a sewer shall be made only with
long curves, 45 wyes, half wyes, quart, sixth, eighth, 16th bends or sanitary tees in on back or side but not more than 45 degrees
Minimum size of a house sewer
4in nor less than that of house drain
A storm sewer shall not be laid paralell to or within ___ft of a ______
2, bearing wall
A storm sewer shall be laid at sufficient depth to protect it from
freezing
Combined house drain or sewer shall not be less than _____
4in and not smaller than required for same FU’s or same roof area in seperate systems
For building after Aug 1 1996, each plumbing fixture or opening connecting to combo sewer shall either be installed __________ or discharge _________
above elevation of the cover of nearest manhole serving the main
through a sewage ejector to the combo sewer system at an elevation high enough to prevent flooding of the building
A house sewer laid in undisturbed ground shall be laid at on at least ______
4in pea gravel, sand, or other approved grillage
A storm sewer laid in undistributed ground requires
no grillage
Storm or house sewer laid in filled ground shall__________
be embedded to lower quadrant with at least 4in concrete pad below invert or other equivalent
A support filled in ground shall be on a ______center to a solid footing, either undisturbed earth or rock
10ft
A house sewer constructed of flexible thermoplastic shall be installed with at least
6in of gravel on all sides
In a public building, where whole or part of building drain/DWV is below level of sewer main, waste shall be __________
lifted according to sump/receiving tank requirements or a vented ejector
In a residential building with sewer level above basement floor, waste shall be lifted by means of and constructed how
an approved sump pump that is gas and air tight and constructed of poured or precast concrete, approved fiberglass or PE material
A sump pit shall be provided with __ vent which can also ___
a 2in vent which can also be a waste and vent for laundry tray
Sump pump discharge piping shall be _____ waste pipe extended ______
2in, inside the building to a least 12in above outside grade plan
Sump pit shall be provided with _______
tight fitting concrete cover
On the outside of the building, the waste piping [from sump pit] shall connect into a _______ and _____
4x2 sanitary tee connected to 4in trap and then into sanitary sewer
the tee at least 2in above finished grade plan and shall have ventilated cap
A subsoil drain shall discharge into _____
an airtight sump or receiving tank located to receive sewage by gravity
__________ or ________ shall lift sewage and discharge into house sewer
pump or ejector
Sewage sumps shall be a min of ________ size and no less than ______ depth
24 in for both
Sewage pump system that relies solely on a pump shall be equipped with
audible and visual alarm to be place in occupied space
A sump shall discharge how
automatically
A sewage ejector shall be vented with what size in residential? commercial or industrial? Exception
2in res
3in comm
Except in comm if 3 in vent stack serves a fixture that empties into ejector pit is less than 25ft away from pit a re vent with 2in back to 3in stack is acceptable
The ejector vent shall not be smaller than
recommended by the manufacturer of the pump
If a subsoil catch basin is installed below sewer level ______ shall be used and shall discharge into __________ or _________
automatic ejector
properly trapped fixture or into storm water drain
A roof, paved area, court or courtyard shall be drained into
storm water, combo, or surface drainage area unless prohibited
If a roof, paved area, court or courtyard drain is connected to combined sewer it shall be,
trapped (inside or below frost line) unless opening at top is more than 10ft from window, scuttle, air shaft
Trap for roof, paved area, court(yard) drain shall be
set below frost line or inside the building
Conductor or roof leader in the building or interior court or vent pipe shaft shall be contructed of
CI, Galv iron, Galv steel, copper, Schedule 40 ABS or PVC DWV, resin
PVC or ABS for conductors or leaders shall be limited to buildings with conductor not exceeding _______ in height unless _________
45ft
certain ASTM stamps for piping, install is made per manufacturer’s recommendations (and can prove) and firestop systems inspected by approved inspection agency
If outside sheet metal conductor or downspout is connected to house drain it must be with
a CI pipe extending vertically at least 1ft above grade plane
A conductor pipe shall not be used as a ______ pipe
DWV or vice a versa
Overflow pipe shall connect how with house sewer, drain or waste pipe
indirectly
The ejector vent shall not be smaller than
recommended by the manufacturer of the pump
A subsoil drain below sewer level shall discharge into ___________ and shall be ______________ into the _____________or ________________.
a sump or receiving tank
automatically lifted and discharged
storm drainage system or upon the ground outside the building it serves.
