I’ve been reading up quite a lot on boreholes, pumping water, pressure, flow rates etc. but I think I reached the limits of my Google skills. I understand Volts and Amps, but this water thing has me stumped.
I plan to build a off grid camp site in the bush, the bathrooms will be distributed over a area of 3 ha more or less. To keep things simple, let’s say I place the water tank/s slap bang in the middle of the campsite, so absolute max distance to the furthest bathroom will be 150m.
- From what I read a 10m tank stand gives you more or less 1 bar of pressure already. So even though it’s quite expensive, I think going with a tank stand will be a given since I want to keep this off grid and even avoid pressure pumps if I can though I doubt I’ll be able to.
- What diameter and class HDPE pipe should I use from the tank to each bathroom to get the maximum amount of flow / pressure at the furthest bathroom which will be 150m away? From what I understand a bigger diameter pipe will give a better flow rate, but only up to a point and the bigger the pipe, the lower the pressure. How do you calculate this, how do you find the balance.
- Each bathroom will have a shower, basin and toilet, decent flow / pressure for the shower will be essential even though the gas geyser can work on 0.25 to 5 bar, I want a decent shower.
- Is it a pipe dream hoping to do this without a pressure pump and if so, what size pressure pump will I need keeping in mind that I’ll have to eventually drive this with solar and batteries? I should of course also keep in mind that there will be times that 2 or more showers will be used at the same time.
- The dumbest question of them all, should I run a pipe from the water tank to each bathroom call it “parallel” piping, or can I run the piping from one bathroom to the next in “series”?