>>912185>>912190In the USA, there are many stores you can buy everything you need to easily fix/replace anything in a house. I'd just replace the pump and all waterlines and fixtures as needed. I have the option of using PEX piping which is ultra easy to install, though I'd prefer to use a copper line for the line you get potable water from.
For me, I use an submersible water well pump for a 60' deep well ($650usd). That is the most expensive thing. I've replaced it twice in 35 years. Once due to old age then later due to the torsion arrestors not preventing the electric wires from rubbing the pipe and breaking (pic); which shorted and destroyed the pump motor. The rest of the water system in the house cost about $300usd, not including fixtures. Price increases would make everything cost about $1200usd today I think. I recall that AU prices are much higher I think ($800+ for a 80L/m pump).
I'd recommend checking the pump's electronics for electrical shorts by using a cheap continuity meter/voltage meter BEFORE you turn it on. Install a pressure switch if there isn't one already. Fire it up and run around looking for leaks. Replace pipes as needed or run all new lines if there's too many leaks. I can't image there being all that many leaks if you area isn't seeing freezing temps in winter. Make sure the highest pressure setting on the pressure switch is less than what your pipes are rated for. Otherwise, they can leak at their joints (which normally stops when the pressure is reduced to normal.)
You will also need a pressure tank. The larger the better. Those reduce the number of starts on/off the pump has to do. Pumps have a limited number of starts before they die. The larger the tank the fewer the amount of starts over time and the longer the pump lasts.
