Sump and sewage tanks Flashcards
Sump tanks may only receive discharge from
Fixtures that cannot drain to the building sewer by gravity
Stormwater sumps are installed where
All of the answers
________ type of pump are most common types of pump used for storm and sewage pumps
Centrifugal
Pumps where the motor is actually in the sum are referred to as
Submersible
Some storm some pumps are equipped with__________ to protect the impeller from damage
A screen or strainer
So pumps are designed to handle solids of up to
2 inch
Effluent pumps are typically used to pump….
Septic tank discharge elevated absorption bed
Control switches that relay on the weight of the water acting on a flexible disc….
Diaphragm switches
A storm or sewage pump installation that has one pump is referred to as
Simplex system
A storm or sewage pump installation that has two pumps is referred to as
Duplex system
Duplex pumps are typically controlled by
Alternating lag lead controller
A storm sump pump may not discharge into a
Sanitary building drain
The minimum size of a sewage or sump pump discharge is
The same size as the pump connection
The discharge of a water sewage pump must be installed with____________ _________ and_________ that order in the direction of flow
Union, check valve and shut off valve
In a duplex installation, the valve train referred to in question 14
Must be installed for each pump
The sewage ejector must connect to either the sanitary building, drain or a
Sanitary building, sewer
When a building trap is installed, the force main must connect
Downstream of the building trap
Sewage tank must be provided with
Both A and C
So eject is manually controlled the sewage tank must
Be large enough to hold 24 hours of accumulation
The absolute minimum size of rent for a sewage tank is
2 inch
If a sewage tank has a 4 inch inlet, the minimum vent size is
3 inch
If the inlet to a sewage tank is 5 inch or larger the minimum size vent is
4 inch
The vent for sewage tanks are connected to
The venting system
Fixtures that connect to a sewage tank must be
Trapped vented
One calculating the vent loading form, a bathroom group, discharging into a huge tank the vent for the huge ejector itself has a vent load
Equal to no factor
The size of vent required for a sewage tank that serves three water closet 4 lavs and two wall hung urinals from a single sub drain would be
3 inch
Sanitary forced mains are indicated on drain plants and stack elevations as
Broken red lines
Storm forced mean or indicated on drain plans and stack elevations as
Broken blue lines
One calculate the size of a sanitary building drain that receives a forced main discharge the….
The L/sec. Rating of the ejector is converted to fixture unit and added to the total fixture unit load from the fixture served by the building dream.

