We live on a small tropical island and one of our biggest problem is lack of knowledgeable plumbing help. So far I have not found locally anybody that can answer a lot of my questions so here I am. Please note I did not set up our water system, I inherited it as is. Our property water supply comes from a 22 m deep well (4 inch outer pipe drill with 1 inch inner pipe) and a surface mounted 2 hp pump that fills a 600 litter interim deposit tank at the well surface. From this interim deposit tank we use another 2 hp pump with a pressure tank to pump water to an 80 m distant, 6,000 litter gravity tank which is elevated by another 15 m above the well surface. From there I have a choice of either gravity feeding the property (for those quite common power outages) or directing the water supply through another 1,000 litter pressure tank with a 2 hp pump (for being able to operate on demand water heaters). This whole setup with three 2 hp pumps seems like an overkill, is probably costing us a ton on our electricity bill and I am looking for suggestions on how to do a more efficient and more reliable setup. Question 1. do I really need 2 hp pump to suck water out of the well (1 inch pipe, 22 m deep)? If not what size/power pump will do the job? Question 2. do I need a pressure tank for pumping water from the interim tank to the gravity tank or can this be done with a pump only (80 m distance, 15 m up, 1 inch pipe)? If a pump is sufficient, what size/power pump will do the job? Question 3. do I really need 2 hp pump with a 1,000 litter pressure tank feeding the property? If not what size/power pump will do the job? Please steer away from submersible deep well pump suggestions. Not available here and nobody has any clue what or how to do with them. None the less, after answering the above questions I would still like to hear if you have any suggestions on how to do this whole thing better.