Max trap arm lengths
Flow rates for grease interceptor
Building Traps
Construction and size of interceptors
Oil and Flammable liquid interceptors
100

What is the maximum trap arm length for 1-1/2" drain? 

3.5'

100

What is the max Gpm for a 2" pipe on grease interceptor?

20GPM

100

Building traps shall not be installed except where required by the ____________

Authority Having Jurisdiction

100

True or false?

Sand interceptors can be built out of bricks

True

100

Does a car repair garage require a interceptor?

Yes

200

What is the maximum trap arm length for 3" drain pipe?

6'

200

What is the max Gpm for a 4" pipe on grease interceptor?

125 GPM

200

What does each building trap need for maintenence?

Cleanout

200

What is the minimum inlet size for a sand interceptor?

3"

200

What is the minimum vent size for a flammable waste interceptor 

2"

300

What is the maximum trap arm length for a 2" drain pipe

5'

300

What is the max Gpm for a 3" pipe on grease interceptor?

60gpm

300

What also is required on the inlet side of the trap to ensure proper flow?

Vent

300

What size is the outlet of a 3" sand interceptor? 

3"

300

Oil and flammable interceptors shall be installed with what kind of cleanout?

gas tight cleanout

400

What is the maximum trap arm length for a 4" drain pipe?

10'

400

What is the max Gpm for a 5" pipe on grease interceptor?

230gpm

400

What is the minimum required vent size for a building trap?

Half the diameter of the building trap size

400

Are the inlet and outlet of a interceptor inline with one another or offset?

offset

400

Can waste oil from an interceptor be pumped out or gravity fed?

Both

500

What is the formula to find the cross sectional value of a pipe?

Pipe size X Pipe size X .7854

500

What is the max Gpm for a 6" pipe on grease interceptor?

375gpm

500

Where does the the building trap terminate?

Above grade outside of building

500

Can the inlet pipe be lower than the outlet pipe on a interceptor?

NO

500

What else is required on the cleanout that severs the flammable waste interceptor? 

Must be readily accessible.

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