Drained Lead Acid Battery Scrap..
Steel pipes.
Stainless steel pipes.
Electric Power Meters, Water Meter
.
Pressure actuated water regulating valve.
Wood planks (pine, iroko, teak), metal sheets (metal, stainless steel, aluminum, corten), connecting details (bolts, etc), paint (powder coating, aqua wood stain), chemicals for wood's impregnation..