--r VENT IS NOT ALLOWED TO

~ VENT CONNECT TO OTHER VENT PIPING 4" STANDPIPE OR (SEE SECTIONt-------7 710.10) ~VENTED RECEPTOR

I I I I

OPTION #1 I I I I I IOPTION #2

I ACCESSIBLE II GATE VALVE OR

DISCHARGE TO FULL-PORTVENTED FLOOR SINK I BALL VALVE

I L._---t-- -+ ACESSI BLE

----1------+------<;====t===;,----------.i....---1---~.l,..____,j CHECK VALVE

~-DRY PAN DRAINSUMP BASIN

ELEVATOR PIT

THE SUMP, PUMP, AND DISCHARGE PIPING MUST COMPLY WITH THE REQUIREMENTS OF M.R. CHAPTER 4714, SECTION 710. SUMP

PUMP---4"DRAIN AT 1 / 4-INCH PER FOOT SLOPE CAN SERVE TWO ELEVATORS (100 GPM).

M.R. CHAPTER 4714. SECTION 418.6 AND M.R. PART 1307.0067: - AN ELEVATOR PIT DRAIN MUST DISCHARGE TO THE SANITARY SEWER USING AN INDIRECT CONNECTION THAT

PRECLUDES THE POSSIBILITY OF SEWAGE BACKUP INTO THE PIT. IF A SUMP IS USED, IT MUST BE LOCATED OUTSIDE OF THE PIT WITH A DRY PAN DRAIN FLOWING TO IT.

- SIZING OF PIT DRAINS AND SUMP PUMPS MUST BE AT LEAST 3,000 GALLONS PER HOUR (50 GALLONS PER MINUTE) FOR EACH ELEVATOR INTENDED FOR EMERGENCY FIRE SERVICE (SEE M.R. CHAPTER 1307, AND ASME STANDARD A17.1/CSA B44-2016 2.2.2.4).

M.R. CHAPTER 4714. SECTION 804.1: - PLUMBING FIXTURES OR RECEPTORS RECEIVING THE DISCHARGE OF INDIRECT WASTE PIPES MUST BE OF SUCH SHAPE

AND CAPACITY AS TO PREVENT SPLASHING OR FLOODING.

Elevator Pit DrainDEPARTMENT OF LABOR AND INDUSTRY

Phone: (651) 284-5063 www.dIi . mn. gov/business/plumbing-contractors/alternates-checklists-and-other-information

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