Pentair 43" Air Bleed Tube Vent with Screen

The Pentair 43" Air Bleed Tube Vent with Screen (Part #178818) is an internal safety and pressure-regulation component engineered explicitly for Pentair FullFloXF® 4000-Series High-Efficiency Cartridge and D.E. Pool and Spa Filters. Measuring 43 inches in length to span the full vertical height of the filter vessel, this rigid composite tube serves as an automatic internal vent line. It spans from the lower plumbing manifold up to the very apex of the filter tank dome.

Its primary operational function is to continuously capture and exhaust trapped air pockets that naturally accumulate at the top of the pressurized tank during pump cycles. By channeling this air back down through the system plumbing, it prevents dangerous high-pressure air accumulation that could disrupt water flow dynamics or stress the filter body. Additionally, the tube features an ultra-fine mesh screen cap at its intake tip to prevent loose debris, hair, or unfiltered particulates from clogging the narrow air relief channel, keeping the automatic vent clear and functional.

Weight and Shipping Profile

• Actual Product Weight: Approximately 1.0 pound due to its lightweight, hollow plastic structure.

• Packaged Shipping Weight: Typically scales between 2.0 and 3.0 pounds because its elongated 43-inch frame requires an extended, highly rigid cardboard mailing tube or rectangular box to protect it against bending, snapping, or cracking during transit.