(see attached) What is it used for and how does it work? This has perplexed me since I bought our house.
Thanks,
Keith
Thanks,
Keith
Can anyone identify this fitting?
- Thread starter stedmakr
- Start date
Question 12: What is a suction limiting vent system?
Answer: Suction-Limiting Vent System -- a pipe vented to the atmosphere that connects to the suction pipe between the pool and the pump.
When a high vacuum event occurs, air from the vent pipe replaces the water in the suction pipe thereby breaking the suction.
The vent opening is protected by a tamper resistant cover.
Answer: Suction-Limiting Vent System -- a pipe vented to the atmosphere that connects to the suction pipe between the pool and the pump.
When a high vacuum event occurs, air from the vent pipe replaces the water in the suction pipe thereby breaking the suction.
The vent opening is protected by a tamper resistant cover.
In a 2002 suction entrapment incident, a seven year old girl named Virginia Graeme Baker was trapped underwater by a direct suction main drain.
Virginia was the granddaughter of Secretary of State James Baker III and as a result powerful forces were set in motion and on December 19, 2007 the Virginia Graeme Baker Pool and Spa Safety Act became Law.
The Virginia Graeme Baker Act requires that after December 19, 2008 every swimming pool or spa drain cover manufactured, distributed or entered into commerce in the United States conform to the entrapment protection standards of the ASME/ANSI A112.19.8 performance standard or any successor standard regulating such swimming pool or drain cover.
These drain covers are specially designed to prevent suction entrapment and were required on all public pools by that date.
But because suction entrapment often occurs when there is a missing or broken grate the law requires pools with a single main drain other than an unblockable drain to have a secondary layer of protection.
The second layer can be one of the following five options:
I. Safety Vacuum Release System – A safety vacuum release system which ceases operation of the pump, reverses the circulation flow or otherwise provides a vacuum release at a suction outlet when a blockage is detected, that has been tested by an independent third party and found to conform to ASME/ANSI standard A112.19.17 or ASTM standard F2287.
II. Suction Limiting Vent System – A suction limiting vent system with a tamper resistant opening.
III. Gravity Drainage System – A gravity drainage system that utilizes a collector tank.
IV. Automatic Pump Shut-off System – An Automatic Pump Shut-off System.
V. Drain Disablement – A device or system that disables the drain.
Florida regulations have required gravity drainage for public pools since 1977 and for public spas since 1993 to prevent entrapment” according to Patti Anderson, Bureau Chief for Water Programs with the Florida Department of Health (DOH).
Virginia was the granddaughter of Secretary of State James Baker III and as a result powerful forces were set in motion and on December 19, 2007 the Virginia Graeme Baker Pool and Spa Safety Act became Law.
The Virginia Graeme Baker Act requires that after December 19, 2008 every swimming pool or spa drain cover manufactured, distributed or entered into commerce in the United States conform to the entrapment protection standards of the ASME/ANSI A112.19.8 performance standard or any successor standard regulating such swimming pool or drain cover.
These drain covers are specially designed to prevent suction entrapment and were required on all public pools by that date.
But because suction entrapment often occurs when there is a missing or broken grate the law requires pools with a single main drain other than an unblockable drain to have a secondary layer of protection.
The second layer can be one of the following five options:
I. Safety Vacuum Release System – A safety vacuum release system which ceases operation of the pump, reverses the circulation flow or otherwise provides a vacuum release at a suction outlet when a blockage is detected, that has been tested by an independent third party and found to conform to ASME/ANSI standard A112.19.17 or ASTM standard F2287.
II. Suction Limiting Vent System – A suction limiting vent system with a tamper resistant opening.
III. Gravity Drainage System – A gravity drainage system that utilizes a collector tank.
IV. Automatic Pump Shut-off System – An Automatic Pump Shut-off System.
V. Drain Disablement – A device or system that disables the drain.
Florida regulations have required gravity drainage for public pools since 1977 and for public spas since 1993 to prevent entrapment” according to Patti Anderson, Bureau Chief for Water Programs with the Florida Department of Health (DOH).
