Engineering guides to water treatment, wastewater, equipment operation and regulations.
The same water leaves a cold pipe untouched and scales up a water heater. How to tell in advance from five values in a water analysis what the water will do to a system, and why softening to zero is not always a good thing.
September 2026 · 7 min→Operation · SofteningRunxin valves: reading the designation, and when manual is enoughF56E, F67P and F117Q3 markings explained, top and side mounting, connection size and throughput — plus where manual backwash control still makes sense.
July 2026 · 7 min→Sizing · SofteningWater softening: hardness, salt use, Simplex or DuplexHow to work out the resin volume you need, when a timer will do instead of a meter, and when one tank is not enough.
July 2026 · 6 min→