Currently, drinking water source protection in Jilin Province in the town there are still some problems can not be ignored, if the water was drinking water attenuation trend, and some drinking water quality decline, and some drinking water contamination potential danger exists , sudden water pollution accidents have occurred, the local groundwater over-exploitation of the problem still exists, and some towns have no alternate source of water, which gave the people a greater risk to bring safe drinking water. Filter 
No negative pressure vacuum suppressor inlet water supply equipment directly connected with the water pipe network, the remaining water in the water pipe network under pressure into the pressure-driven equipment into the water, equipment, pressure pump residual pressure in the water pressure to build on , the water pressure to the pressure required by the user after the water supply network to the outlet pipe; when the user is greater than the tap water when the water supply pipe, into the water network pressure drop, inlet pressure drops when the device is less than the absolute pressure 0 (or set of pipeline pressure protection), the non-vacuum equipment and vacuum control equipment automatically start suppressors work, adjust the equipment until the equipment running off standby to ensure that the inlet pressure not to reduce the net on the water pipe network adversely affected; pipe filter 
When the ability to restore water supply pipe network, the pressure in the inlet pressure recovery to protect the above, the device automatically starts to restore normal water supply; when the remaining water pipe network water pressure to meet user requirements, the device automatically enters sleep mode, the water pipe network directly to the users of water, inadequate water supply when the device to automatically run; when users do not use water or water is very low, the device automatically enters sleep mode off, set in the device by the side of a small flow of water pressure regulator can maintain security and control of water users net leakage, water users holding pressure regulator can not maintain the required pressure water supply network, the device automatically wake up and resume normal operation. Full use of the device during operation of the remaining water pipe network pressure, neither of the water pipe network has a negative impact and maximize the satisfaction of customer needs, reduce water consumption, water supply system to achieve optimal operation. Self-cleaning filter 
In order to strengthen water pollution control, 2008, the NPC Standing Committee on the "PRC Water Pollution Prevention Law" was amended to protect drinking water sources and the specification for the development of local laws and regulations provide a legal basis. The end of 2010, Jilin Province, the urban population has reached 14,655,800, accounting for 53.36% of total provincial population, drinking water safety situation is very serious, urgent need to develop a line with the actual town of Jilin Province, drinking water source protection regulations. Basket-type filter