When a person decided to install water pump to boost the system pressure, is better to upgrade the piping also.
And to be safe, off the power supply when not in use.

I'm not here to do business.
I'm here to share my knowledge.
I'm dealing with all sort of pumps for the past 10 years before I change my job.

Can complaint or "songlap" the Syabas technician to increase your incoming water pressure. Before the meter, they have a special valve that only can be adjusted by their special key. By default, this valve never been adjusted to max, can adjust this first.

As long as you have metal in between, this is normal. Stagnant water are good metal killer.

Are you telling me that the pump setup has a bypass pipe? If yes, then the rust water are from the pump.

Long term is an issue as it is slowly corroding the pump internal.

Chlorine in the water that causing the corrosion.

Nothing much can be done. That's why I never bother to install a pump even the pressure are not that high if were compare to hotel.

That valve should be pressure relief valve, not non return valve.
NRV are to prevent back flow while PRV is to control the pipe not to over-pressure and bursting the pipes.

Don't be a cheapskate, use poly pipe direct. PVC is still PVC, what class being used you won't know

The question now would be, how you know it is class7 PVC? What if some people mixed it with lower class on hidden parts? Most of the piping's wording are faded, so you know I know what is happening.
That's why I will just opt for poly pipe rather than PVC, lesser chance of getting conned
Website pricing can only served as a reference, actual pricing you still need to find out from the shop you buy

Stainless steel over do already, just poly pipe will be good enough
PVC has too many grades while poly pipe lesser and also joint and corner need to use metal clamp to secure, PVC pipe only use gum.

Those poly pipes no need to conceal totally, from outside you can lay it on the side of the wall and go up through the ceiling before entering the water tank.
Every material used for pipes tend to leak over the time and you will only knows it when your water bill price are high.
In my area, already have 30% of the total of 1500 houses changed to poly pipe or laying the pipe outside.

If any seller tells you their products are maintenance free, I won't buy.

Well, what you need to do is make sure the pump's maximum discharge pressure does not go beyond the pipe's rated pressure in the event of the pump's auto cut in-out feature and relief valve failed. Something like if the pump's discharge pressure is 3 bar, the pipe must withstand 5bar minimum.
Guess describing using numbers will let you understand better.
While metal pipes are more durable against pressure, but not stagnant water that will corrodes the pipes. Both of the pipes(metal and non metal) have limitations. While there's AC pipe which is the best, but it post health issues. No perfect material for pipes currently.

Need to know all in detail, else like you add a pump but using low quality PVC pipes may end up the pipe burst

Is more on the pressure control failure.

Pressure gauge is the only thing you need to know the pressure, as the PVC pipes have the specs, but pipe only carry small aspect on this, the connection joints are more important.

Depends on the length of pipe used and wiring.
Sounds to be right but still the job scope is unknown.

Ok, guess I need to be more specific, is where the pump will be installed and how the piping is done, like can it be bypassed if the pump failed.