When it’s 1 or more boilers for 1 engine/turbine, pipe cannot be too big. Usually it’s 1 boiler -> 1 engine/turbine, and pipe has to have bigger steam/t than boiler outputs. Normal bronze pipes are good for medium boilers (dense bronze; 192 steam/t; good for maxing out bronze sluice, centrifuge, etc.). Big boilers (like strong/dense titanium-chromium pair, needed by MV electrolyzer) need muuuch bigger steam pipe. Something huge.
Distilled water production efficiency… It has generally the same energy price to produce, except distilling biomass (also get ethanol) and oxygen+hudrogen at burner mixer.
My first distilled water I usually get from drying grass, later mostly from drying sluice juice.