Pool filter pressure gauge

A gauge comprising a housing having a chamber therein, means coupling the chamber to a source of liquid under pressure, a member secured to the housing at the top of the chamber for opening and closing the chamber to the atmosphere, a tubular member extending vertically inside the housing, the lower end being open to the interior of the chamber and the upper end being closed, whereby liquid rising in the chamber traps air in the tube, and a cup-shaped member in the chamber open adjacent the top of the chamber above the level at which liquid enters the chamber through the liquid coupling means, the lower end of the tubular member extending downwardly inside the cup-shaped member, whereby the level of liquid entering the chamber must rise above the top of the cup-shaped member to fill the cup-shaped member with liquid and trapping air in the tubular member.

A combination pressure gauge and air bleeder for a pool filter comprising a housing forming a fluid-tight chamber, means for opening and closing the top of the chamber to the atmosphere to release air trapped in the chamber, fluid conductive means connecting the bottom of the chamber to the top of the filter for directing pool water under pressure from the filter into the chamber, a hollow tube extending downwardly from the top of the housing into the chamber, the interior of the tube being open only adjacent the lower end thereof, whereby air is trapped in the tube by water rising in the chamber, and means visible from outside the chamber indicating the level of the water in the tube, said means for opening and closing the chamber including a removable screw cap forming the top of the housing, the upper end of the tube being secured to the inside of the cap, whereby the tube and cap are removable as a unit.