When turning on or off the Water Dispenser Tap & Faucet(KOKOELECTRIC) https://www.kokoelectric.com/product/water-dispenser-tap-faucet/ , it may scream, whistle or squeak. There are several possible reasons for these sharp voices. If the house is newly built, the pipeline may be too narrow to allow water to flow smoothly through it. Similarly, the pipes in old houses may be narrowed due to the obstruction of scale formation. At this time, the water dispenser tap & faucet will also make noise. In both cases, these pipes must be replaced in order to get rid of the noise. This will not be repaired soon. However, the noise of water dispenser tap & faucet is more likely due to the incorrect size of the gasket, which may be caused by the gasket not being tightly attached to the faucet valve core. Before starting this repair work or any other repair work on the faucet, the water supply should be turned off. Replacement gaskets may be tightly attached to eliminate noise. If the water dispenser tap & faucet are still noisy, check the gasket seat. The gasket seat may be partially sealed by the residue, so that the restricted water flow will produce a whistle that may squeak. If this is the case, clean the gasket seat. The long shriek heard when rotating the faucet handle means that the metal thread of the valve core is squeezing the thread of the faucet. Remove the valve core and coat some vaseline oil on both threads. Its smooth effect should be able to stop this noise and make the handle easier to rotate. Of course, if the thread of the valve core or the thread of the faucet body is worn, the effect between them will make the faucet vibrate and make noise. Under such circumstances, it is not enough to apply smooth oil to completely eliminate the noise of water dispenser tap & faucet. Install a new valve core to see if noise still occurs. If there is still noise, then the reason is that the threads of the faucet body are worn out. The only solution is to replace the water dispenser tap & faucet with a brand new one. Click Tap Filter & Shower Filter https://www.kokoelectric.com/product/tap-filter-shower-filter/ to learn about more information.