TechnoflexEasyDC9The dark ones are galvanized steel. Threaded joints, auxiliary lines for overflow -- a major upgrade.
TechnoflexMediumDC10A Wachbann door. Double-skin boron-alloy, tungsten-carbide backing, sixty millimetre core. High-end prison-grade.
TechnoflexMediumDC10Sequential logic applies. Operating the controls in a specific order will lower the water outside.
TechnoflexMediumDC10Best guess: toggle for a humidity sensor, or pressure relief for a bypass pipe. Ignore it -- it's irrelevant.
