Vak Pak's Gravity Drainage System
, pioneered by company founder Paul Sutherland, is the safest system on the market, using gravity feed collection tanks that exceed the stringent requirements of the Virginia Graeme Baker Pool and Spa Safety Act enacted in 2007.
The THAI technology offers a number of advantages over the current steam-assisted gravity drainage system
for heavy oil recovery, including 70 to 80 percent higher potential resource recovery, lower production and capital costs, minimal usage of natural gas and fresh water, the possibility of a partially upgraded crude oil product and significantly lower greenhouse emissions.
Development of two gravity drainage systems
on the airfield to improve removal of water in case of flooding.
Pools with multiple drains or gravity drainage systems
do not have to replace their covers.
All pools that have a single main drain, other than an unblockable drain, must be provided with one or more additional devices or systems designed to prevent suction entrapment, such as safety vacuum release systems, suction limiting vents, gravity drainage systems
or automatic pump shut-offs