Hayward 1/4" MPT In Line Back Mount Vacuum Gauge (AXV096GR) poolparts An outdoor stack assembly is

An outdoor stack assembly is useful because it helps manage the intended exhaust transition and supports proper fit for the heater’s external venting arrangement

Useful during upgrades

Useful during pump service and reassembly work

Replacing it can help restore smoother internal flow and improve confidence in the quality of the repair

Hayward 1/4" MPT In Line Back Mount Vacuum Gauge (AXV096GR) poolparts An outdoor stack assembly isThe Hayward in line back mount vacuum gauge is designed for compatible suction and circulation applications where vacuum conditions need to be monitored. A vacuum gauge is useful because it helps show negative pressure conditions in the line, supporting troubleshooting and clearer evaluation of suction related performance. This replacement is especially useful when the original gauge is cracked, leaking, inaccurate, or unreadable. Matching the correct