Filtration system having flow control means and tank adapter with selective venting

A filtration tank assembly for use in a system for removing contaminants from a water supply, the filtration tank assembly receiving air laden water and returning filtered water to service, said filtration tank assembly comprising:

• a tank housing having a filter media therein for filtering contaminants from the water and a neck opening;
• flow control valving means adapted to be received within said neck opening of said tank housing, said valving means controlling fluid flow through said tank for normal operation and backwash operation, said valving means having a fluid inlet to receive the air laden water during normal operation and a fluid outlet to deliver filtered water to service during normal operation;
• and
• an adapter mounted within said neck opening of said tank housing and receiving said flow control valving means, air laden water from said valving means flowing through at least one fluid passageway of said adapter during normal operation into said tank housing, said adapter including means for selectively venting accumulated gases from said tank housing.

In a filtration tank, an adapter to vent accumulated gases from the tank, the filtration tank including a filter media and means for controlling fluid flow through the tank during normal and backwash operations, the flow control means adapted to be normally received within a neck opening of the tank, the improvement comprising:

• a flange body received within the neck opening of the tank, said flange body including means for receiving the flow control means;
• vent means mounted to said flange body, said vent means including a vent port formed in said flange body and a vent valve positioned within said vent port, said vent valve selectively operable when the accumulated gases attain a predetermined volume within the tank;
• and
• at least one fluid passageway providing fluid communication between the flow control means and the interior of the tank;
• said adapter venting accumulated gases from the tank through selectively operable vent means when the accumulated gases attain a predetermined volume and providing fluid communication between the flow control means and the tank interior during backwash and normal operating cycles.

A system for removing contaminants from a water supply comprising:

• means for entraining a controlled quantity of air into the water to oxidize the contaminants in the water;
• a filtration tank having flow control means to control fluid flow through said tank, said control means including a fluid inlet to receive the water from said air entraining means and a fluid outlet to deliver filtered water to service;
• and
• an adapter received within a neck opening of said tank, said adapter receiving said flow control means, said adapter including means for selectively venting accumulated gases from said filtration tank;
• said filtration tank having a filter bed for filtering contaminants from the water and means for backwashing said filter bed to dispose of accumulated contaminants, the water flowing through said flow control means into said tank, through said filter bed to remove contaminants from the water, and from said filtration tank through said fluid outlet of said control means;
• and
• said adapter including at least one fluid passageway in fluid communication with said flow control means of said filtration tank and means for receiving a stand pipe of said flow control means extending into said filter bed, fluid flowing through said at least one fluid passageway and said stand pipe in a first direction during normal operation of the system and flowing through said at least one fluid passageway and said stand pipe in a second direction during backwash of the system, said flow control means controlling fluid flow through said at least one fluid passageway and stand pipe.