Question: I have a dual head Magna 3, model 65-150D that is mounted vertically and its sounds like it has air trapped in the top head. There is not a purge screw like the older large three speed Versaflo pumps. Any suggestions?
Answer: The dual-head pumps installed in horizontal pipes can be fitted with an automatic vent, Rp 1/4″ thread, in the upper part of the pump housing if no venting valve is installed in the system. For more information refer to the installation and operations manual .