Hello i need an advice on what going on with my pump what causing it and how to fix .
So when you open shower pump starts kind of pulsing i have video attached here . so its on and off on and off all the time .
its actually happens only on hot water , and on all outlets . there is this white plastic thing inside the pump on the hot water out witch have a spring and rubber seal . witch seems that seal is in wrong spot its kinda messed up could that be a cause of it ? and can it be replaced or need to call manufacturer to change whole pump ?
it looks very similar to this