Pump 1 pump water along the pipe up to the filter water filter water clean when finished, it will be sent to the pipe to the pump by a 2 and sends it to the system water quality.
One pump to pump water into the pipe up to the filter when the water filter complete the clean water will be sent to the hose to the pump and the second to monitor water quality.
1 pump pump into the pipe to the filter when the filter is water, clean water will be sent to the ตามท่อ to pump the 2nd and sent to the checking system of water quality