A water pressure regulator is a plumbing valve that reduces the water pressure coming from the main water line into the Tami water purifier. This valve brings down the pressure to a safe level before the water reaches any plumbing fixtures inside the water purifier. Too much water pressure may cause significant internal damage to the Tami system, so it is very important to keep the water pressure under control below 3 bars. Please measure your water pressure if you notice loud water running sounds or water hammer sounds in your workplace. You may also contact Tami to do a check if the water dispensed out at a very high velocity.