Master plumbing study
guide
1. Air break A piping arrangement in which a
drain from a fixture appliance or divice
discharges into a receptor at a point
below the flood level rim and above
the trap seal
2. Air chamber Now called water hammer arrestor
3. Air gap drainage Unabstructed vertical distance between
the outlet of the waste pipe and the
flood level rim of the recptor it is
discharging "air gaps are required
where backflow can occur due to back
siphonage"
4. Air gap water distribution/ effective open- Vertical distance between the
lowest open-
ing ing,pipe, faucet supplying water to a tank
fixture or other device and the flood
level rim of the receptor. diameter of
the fixture discharge is the ettective
opening.
5. Battery fixtures Any group of two or more similar
adjacent fixtures that discharge into a
common horo- zontal waste or soil
branch. Can be battery vented in up to
groups of 8 fuxtures
6. Clinical sink A sink primarily for waste very similar to
the characteristics of a toilet
7. Combination fixture Kitchen sink or laundry tub that has
, Master plumbing study
guide
one trap for 2 compartments tied in
within 30 inches of the trap
8. Conductor/ rain leader Vertical drain pipe within the building
that convays storm water from the roof
to its con-
, Master plumbing study
guide
nection to the building storm drain or other
point of disposal
Rain leader is the same but on the exterior of
the building.
9. Critical level The bottom of the back flow preventer
un- less stamped on the back flow
prevention device by the manufacturer
that determines the minimum elevation
above flood level rim.
10. Load factor The percentage of the total connected
fixture unit flow which is likely to occur
at any point in the drainage system
11. Local ventilating pipe A pipe on the fixture side of the trap
which vapor or foul air is removed from
the fixture
12. Reduced pressure zone backflow Provides the highest level of protection
preven- ter assembly against back pressure backflow.
13. SDR Abbreviation for standard dimensional
ratio
that relates to the specific ratio of the
average specified outside diameter to
the minimum wall thickness for outside
diAmeter controlled plastic pipe
14. Prohibited traps Traps that depend upon moving parts
to maintain their seal, Bell traps, crown
vented traps, separate fixture traps that
depend on interior partitions for their
, Master plumbing study
guide
seal,, S traps of uniform internal
dimension, drum traps
15.
guide
1. Air break A piping arrangement in which a
drain from a fixture appliance or divice
discharges into a receptor at a point
below the flood level rim and above
the trap seal
2. Air chamber Now called water hammer arrestor
3. Air gap drainage Unabstructed vertical distance between
the outlet of the waste pipe and the
flood level rim of the recptor it is
discharging "air gaps are required
where backflow can occur due to back
siphonage"
4. Air gap water distribution/ effective open- Vertical distance between the
lowest open-
ing ing,pipe, faucet supplying water to a tank
fixture or other device and the flood
level rim of the receptor. diameter of
the fixture discharge is the ettective
opening.
5. Battery fixtures Any group of two or more similar
adjacent fixtures that discharge into a
common horo- zontal waste or soil
branch. Can be battery vented in up to
groups of 8 fuxtures
6. Clinical sink A sink primarily for waste very similar to
the characteristics of a toilet
7. Combination fixture Kitchen sink or laundry tub that has
, Master plumbing study
guide
one trap for 2 compartments tied in
within 30 inches of the trap
8. Conductor/ rain leader Vertical drain pipe within the building
that convays storm water from the roof
to its con-
, Master plumbing study
guide
nection to the building storm drain or other
point of disposal
Rain leader is the same but on the exterior of
the building.
9. Critical level The bottom of the back flow preventer
un- less stamped on the back flow
prevention device by the manufacturer
that determines the minimum elevation
above flood level rim.
10. Load factor The percentage of the total connected
fixture unit flow which is likely to occur
at any point in the drainage system
11. Local ventilating pipe A pipe on the fixture side of the trap
which vapor or foul air is removed from
the fixture
12. Reduced pressure zone backflow Provides the highest level of protection
preven- ter assembly against back pressure backflow.
13. SDR Abbreviation for standard dimensional
ratio
that relates to the specific ratio of the
average specified outside diameter to
the minimum wall thickness for outside
diAmeter controlled plastic pipe
14. Prohibited traps Traps that depend upon moving parts
to maintain their seal, Bell traps, crown
vented traps, separate fixture traps that
depend on interior partitions for their
, Master plumbing study
guide
seal,, S traps of uniform internal
dimension, drum traps
15.
