If air's coming back then at least 1 of the non return valves has stopped non returning.
Look for a repair kit.
think my pump on its way out i dunno ???,went to pump my RM8 got to 150 then air rushes out,then i pump my AAS400 and the air seems to be coming back into the pump,any ideas please.
If air's coming back then at least 1 of the non return valves has stopped non returning.
Look for a repair kit.