COSC 325 Houston
(plumbing) Questions
and Answers
Why must horizontal vents be sloped? - ANS-so water cannot
accumulate
Main Vent (Vent Stack) - ANS-A vertical vent pipe that provides
air circulation to/from any part of a drainage system. Branches
connect here.
How far above the flood level rim of the highest fixture should a
branch vent be? - ANS-6"
Why are storm water and sanitary waste separated? - ANS-Rain
water takes up large volumes and sanitary must go to a
treatment plant
Purpose of roof drain - ANS-receive rainwater and discharge
into leader
When are storm drain traps required? - ANS-When roof drain
body is within 10' of an opening
Max water pressure allowed in buildings - ANS-80psi
, Purpose of a pressure-reducing valve - ANS-to reduce the
pressure of the MAIN system to a predetermined lower
pressure in the SUBsystem. When street main fluctuates in
pressure, water supply to building must be constant.
GPM - ANS-Gallons per minute. Quantity of fluid flow.
wsfu - ANS-water supply fixture units. Measure of the
estimated water demand of a plumbing fixture
Water closet mounting - ANS-floor set and wall hung
Max volume of water used for flushing wc - ANS-1.6 gallons per
flush
flush tank - ANS-a tank located above or integral with the water
closet, urinal or similar fixtures
for flushing or removing excrements in the fixture
Flushometer valve - ANS-is a device, which discharges a
predetermined quantity of water
into fixtures for flushing purposes and is actuated by direct
water pressure
diaphragm flushometer valve - ANS-flushometer valve in which
a segmented diaphragm within the valve body controls the
flushing water by equalizing pressure on both sides of the
diaphragm
(plumbing) Questions
and Answers
Why must horizontal vents be sloped? - ANS-so water cannot
accumulate
Main Vent (Vent Stack) - ANS-A vertical vent pipe that provides
air circulation to/from any part of a drainage system. Branches
connect here.
How far above the flood level rim of the highest fixture should a
branch vent be? - ANS-6"
Why are storm water and sanitary waste separated? - ANS-Rain
water takes up large volumes and sanitary must go to a
treatment plant
Purpose of roof drain - ANS-receive rainwater and discharge
into leader
When are storm drain traps required? - ANS-When roof drain
body is within 10' of an opening
Max water pressure allowed in buildings - ANS-80psi
, Purpose of a pressure-reducing valve - ANS-to reduce the
pressure of the MAIN system to a predetermined lower
pressure in the SUBsystem. When street main fluctuates in
pressure, water supply to building must be constant.
GPM - ANS-Gallons per minute. Quantity of fluid flow.
wsfu - ANS-water supply fixture units. Measure of the
estimated water demand of a plumbing fixture
Water closet mounting - ANS-floor set and wall hung
Max volume of water used for flushing wc - ANS-1.6 gallons per
flush
flush tank - ANS-a tank located above or integral with the water
closet, urinal or similar fixtures
for flushing or removing excrements in the fixture
Flushometer valve - ANS-is a device, which discharges a
predetermined quantity of water
into fixtures for flushing purposes and is actuated by direct
water pressure
diaphragm flushometer valve - ANS-flushometer valve in which
a segmented diaphragm within the valve body controls the
flushing water by equalizing pressure on both sides of the
diaphragm
