Pentair Black Triton II TR140 Air Relief Tube

The Pentair Black Triton II TR140 Air Relief Tube (part number 150042) is a highly specialized internal air-management component engineered specifically for the Pentair Triton II TR140 high-capacity side-mount fiberglass sand filter. Measuring approximately 22.5 to 29 inches in length with a 3/8-inch outer diameter, this slender tube runs vertically along the inner standpipe assembly to reach the very top of the pressurized filter dome. Its primary structural function is to act as a continuous vacuum and air bleed line, automatically exhausting trapped air pockets that collect inside the upper tank shell down through the underdrain and out into the pool return lines. By safely venting this air, it prevents dangerous pressure spikes, eliminates system surging, and ensures the filter maintains a smooth, completely flooded hydraulic flow. Extruded from a chemical-resistant, UV-stabilized black polymer compound, it is built to survive dense shifting media loads, turbulent internal water movement, and constant exposure to chlorinated pool water without cracking or collapsing. Because it is a narrow, lightweight piece of flexible tubing, this individual internal air relief component carries a minimal net product and shipping weight of approximately 0.05 to 0.10 pounds (about 0.8 to 1.6 ounces).