Rather than install a water pump to create enough water pressure for sinks, showers, etc., in BaanLoiNaam, we have been exploring using a water tank and letting gravity do the work for us. It will still need a pump to pump the water up to the tank, but that pump can be much smaller and slower since it can run for long periods of time to fill up the tank.

We already confirmed that a tank above the shower but under the roof can be placed high enough to provide enough pressure for a usable shower. So we went ahead and installed the tank above the shower:

This is the same blue tank that was painted recently. The color now matches the deep red of the wood walls extraordinarily well.