This sounds like a issue with air still being in the system and not being removed from the system to make things work properly. I did try to findthere number and was unable to locate it. The only other option for you is to return the product and find one with better support
did you get a better answer than this? Like 'where is the air coming from?" so you can do something about it. This is my problem as well and it may be because of air sucking into the suction (low pressure side) line from the tank - faulty couplings? low water in tank or non return valve not sealing? Any suggestions?
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Grunfos Pumps
Gundfos Pumps
Add a CommentWest 118th Terrace
Add a Comment Grundfos Pumps
Grundfos Pumps, 17100 West 118th Terrace, Olathe, Kansas 66061, 913-227-3400
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