Section 5- DWV Flashcards
Underground waste pipe installed beneath a concrete slab shall not be less than
2in in diameter and extend no less than 12 inches above the concrete slab
Tubular brass, PVC, or ABS trap shall not be installed
below the finished floor serving a fixture
TRAP REQUIREMENTS
Fixtures shall be trapped by a water seal how?
seperately; as near as possible to the fixture; but not exceeding 10in from bottom of fixture to the dip of the seal
A fixture trap shall have a water seal not less/more than
less than 2in nor more than 4in
Waste from a bathtub shall or other fixture shall not discharge
into a water closet bend
Are double traps permitted
no
Traps shall be
self cleaning, true to its water seal, protected from frost and evaporation
Trap primers are required on
Floor drains only in mech rooms or boiler rooms AND all open receptacles that receive TP device discharge only
are crown vents permitted
no
fixture traps shall be protected from
siphonage and backpressure
air circulation shall be assured by
means of an individual vent
an open drain, like a hub drain or open receptacle, shall not be installed in
a plenum space
distance of trap and vent is measured
along centerline of waste or soil pipe from vertical inlet of trap to vent opening
fixture trap vent shall not be
below dip of trap except for water closet
fixture branch on a water closet shall not be more than
4ft 6in
Grease traps must be
as near to fixture as possible, approved by dept, and if business establishment, installed per municiple ordinance or State code from private sewage
Sand traps shall be
readily accessible and serve the purpose intended
Slip joints permitted?
are permitted on inlet side; single 1.5in with elastomeric gasket on the outlet side
PIPE CLEANOUT REQUIREMENTS
In a building served by stack over 45ft, a clean out shall be provided at
base of each vertical of soil stack
There must be at least 1 clean out in the building drain where
Full size inside branch in the wall or outside within 2 ft of foundation with a 2 directional fitting (combo tee wyes)
Outside cleanout shall be extended to…
finished grade
Cleanout size shall be
same nominal size as pipe it serves but not less than 4in for larger pipe
Distance between cleanouts in all sewers shall not exceed
150ft
What shall be considered as a cleanout and with what exception
A floor or wall connection of a fixture, except where house drain enters a building
GRADES AND SUPPORTS OF HORZ PIPING
Horizontal piping shall align at uniform grade not less than what and be supported how
Not less than 1/8 in per foot and according to manufacturer
Horizontal piping supports shall not exceed
10ft
A stack shall be supported
At base and at floor level
No hub pipe and fittings shall be supported at
Each joint of pipe and fittings
PVC shall be supported
Every four feet or less, at base of vertical stack, and at each trap branch as close to Trap as possiblr
PE pipe and fitting supported how
Continuously with v channel
CHANGE IN DIRECTION
Single and double sanitary tees
Maybe used in vertical stack (soil waste and vent)