4:12 is an Auto-Vent which you use after top ups to bleed air but then tighten lightly as another means of stopping leaks in once it fails AND it will fail after 5 years.
Hi , as AAVs can be susceptible to leaks after a long time in service, we now provide manifolds with manual air vents. A new video is in the pipeline to reflect this. In the meantime if you use our factsheet M07 & M07s found at 'www.wundagroup.com/support/downloads/' for the latest instructions.
How do I change the Flow return valve?
4:12 is an Auto-Vent which you use after top ups to bleed air but then tighten lightly as another means of stopping leaks in once it fails AND it will fail after 5 years.
Hi , as AAVs can be susceptible to leaks after a long time in service, we now provide manifolds with manual air vents. A new video is in the pipeline to reflect this. In the meantime if you use our factsheet M07 & M07s found at 'www.wundagroup.com/support/downloads/' for the latest instructions.