Hi Bro, looks like you have installed the Grundfos Pump with a pressure tank. Let me tell you my horror story about this pump.
I have installed the same pump about 5 years ago at my house based on the advice from my solarmate water heater supplier to increase the pressure of the shower and etc.
It was so good until I started to face pipe burst (after 2 years) inside the wall. So, called the original plumber to check and he said that it is due to poor quality of pipe installed by developer. Within a weeks time, the same pipe burst again but at different place!! I was not happy with my old plumber, so I called another plumber and he told me the same thing (quality of the pipe not good). Since then, it became a routine to replace burst pipes every now and then in my whole house. I have used almost 6 different plumber but all of them blamed the original pipe installed by the developer was very low in quality (thin its seems).
I realised that I could hear funny sound from the celling everytime I on and off the water tap. So I suspected it could be the pump that I installed. So I called Grundfos @ Glenmarie and to my suprise, they told me that any Grundfos pump with a tank need to be service every 6 months once!!!!
The Grundfos technician who visited my house told me that due to inconsistent of pressure at pump could lead to burst pipe. He advice to service the pump every 6 months once to avoid such problem!!!!
So do remember to service your pump every six months once.
Good luck!
Look like high cost to own a pump which require service every 6mth.