Questions & Answers for: Grundfos air water pipes noise

out, or the zone needs to be bled of air. Another doubtful, but possible, answer is that the circulator is installed backwards. There is an arrow on it and it should be aimed towards the flow of water

air or sediment is probably trapped at the impeller. Remove pump, and connection between hot-and-cold pipes and clean with white vinegar. Or use CLR but do not soak parts in CLR or it can cause damage

...air. with the line full of water, and plenty of water in boiler, I turn it on and the flow of water basically stops. Only about 2 years old. It regularly makes some rattling noise, but it usually ...

...pump seems to develop a banging sound how do i solve this Add air vent? http://waterheatertimer.org/Water-heater-recirculation-system.html http://www.amazon.com/dp/B0078RZDS2/?tag=waterheaterti-20 ...