Diaphragm design: The diaphragm pumps combines the advantages of the auto-priming pumps and the pumps : The rubber can absorb the of the pumps when working : Using a variety of corrosion-resistant materials, auto-priming, thermal for protection, smooth, long duration of continuous idle, long duration of continuous charging Safe: When the water pressure is too high, the pumps will protect itauto and normal work, the water pipes will not burst : Fully sealed, stable high pressure.Small in size, light in weight.Safe and stable in use Easy to install.Installed in a dry, well-ventilated location, pumpss cannot work in water, Manufacturer: SHANGYAKEJI