Pentair 150040 TR50 Air Relief Tube

This air relief tube is designed specifically for Pentair Triton TR-Series sand filters, where it connects the internal air channel to the manual air relief valve assembly. When functioning correctly, it helps remove air that accumulates during pump startup or after filter service. If the tube becomes brittle, cracked, or clogged with debris, the filter may struggle to release air properly, which can cause erratic pressure readings or reduced circulation.

Best for
Pentair Triton TR50 sand filter repairs
Replacing brittle or broken internal filter tubing
Restoring proper air relief during startup

Not ideal for
Cartridge filters
DE filters
Non-Pentair sand filter systems

Inside a sand filter, the air relief system is often overlooked because most of the components sit beneath the top diffuser assembly. However, a damaged or disconnected air relief tube can prevent the filter from purging trapped air properly.

Pro Tip: When replacing this tube, inspect the air relief screen and diffuser assembly at the same time. Debris or scale buildup in these parts can also restrict airflow and reduce filtration efficiency.

Signs of a damaged air relief tube include difficulty releasing air from the filter, inconsistent pressure readings, or air remaining trapped after startup. During filter maintenance, inspect the tube for cracks, brittleness, or blockages. If it shows signs of wear or damage, replacing it ensures the air relief system functions properly and helps keep your filtration system running efficiently.