PH - One stage hand pumps One-stage pumps within the PH-series have a rather simple but very functional design with just a few moving parts. These pumps are real working horses that will last a very long time to come. All PH pumps can be equipped with a pressure gauge in order to have full control about the generated pump force. PH70-500/LS201 - The pump PH70-500 is also available in a version with a pre-mounted hose of 2 m (LS201ES) including quick coupling AQI7 and swivel coupling ASE10. *) Gauges and gauge adapters listed here are recommendations only. Gauges and gauge adapters are not part of the pump. Different combinations of gauge and gauge adapter are possible.