This automatic purge valve carries now, if necessary, with a soft "Pfft" :) ensure that a thus roving bubble is removed automatically.
+ Good and reliable quality
+ Automatic ventilation works fine
+ And manual venting means of the thumbscrew possible
+ With automatic ventilation no risk of black splash :)
+ Easy installation [2]; will require only a 19er Ring / open-ended wrench
+ Heating cost savings [3]
My conclusion: Highly recommended
Note .:
[1] Of course I mean the gurgle. Ström-noise of the water due to poor lines and many angular pipes are of course not wiped out by such a valve)
[2] For the installation (is actually super easy, as neither hemp nor sealing tape is required) I recommend, despite easier assembly for insurance reasons (you never know!) An installer.
[3] The mentioned time and again savings of about 20% are probably more likely to see relatively)
Note: The loop actually takes is a vent valve. However, this should then be at the highest point of the control loop, since the bubbles in a system as possible for them to rise up and get stuck there.