Check the listing for details. 12V Water Pump 130PSI Self Priming Diaphragm High Pressure Automatic Switch. Condition: New. Listed at 16.98 USD. Description: Easy to install. Runs dry without system. Easy connecting system. Totally sealed, high stable pressure. Self priming, silent running, low power consumption. Motor duty cycle will vary with load and ambient temperature. Applications: Car washing machine, the solar energy water, remote control water equipment, some place need to control the switch frequently, somewhere energy saving, etc. Note: This item has built-in test water pressure switch. Water pressure is generally adjusted by the size of the nozzle flow. The adjustable range is 0 to 0.9 mpa. In front of the pump head, there are two lines, which can connect a micro switch to control the water pressure. You need to install this switch by yourself according to your requirements. Connected water inlet pipe length.