Non-return valves supplied by Guru Marketing let the mediums to flow in just one direction. These perform well in several pressure conditions and allow for effective operation. Supplied valves can work automatically and work with zero flaw. Supplied in a wide range of sizes, these simple to use, inexpensive and small valves are made to protect the pumps as well as compressor in an effective way. Supplied valves are made to perform a backflow and reverse flow. Offered valves can do away with the loss of production and ensure substantial energy savings. In addition, the valves can decrease the possibility of unexpected valve failure, by working as excellent alternatives to wastewater, water, and pumping applications.