Propump 2203-1 diaphragm pump. Photo shows type with clip on fittings but this is for one with a push on 8mm stub fitting. Looking at the pump the flow goes from right to left. DC permanent magnet drive, wide torsion, high pressure, stable performance, small, light, easy to install, self priming, pressure automatic switch, thermally protected, low noise, liquid temperature allowance up to 60° c, acid, alkali, corrosion resistant.
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