Queries regarding suitability of pump & pipe for a borewell in an apartment in Bangalore, Karnataka

This is with reference to our Apartment located in Bangalore.

Our borewell is ~800 feet deep and the builder has installed a 7.5 HP motor, 20 stage pump to suit our needs.

Appreciate your advise on the following:

1. Whether 7.5 HP motor, 20 stage pump is aligned to a deivery head of 800 feet.

2. The discharge is constructed out of UPVC pipes. They appear to be quite rigid and are installed in sections of ~10 feet length (80 odd pipes). What is the currently reliability associated with UPVC pipes? Is it the latest trend? What about GI pipes from the technical and cost standpoint?

Thanks in advance for your response.