1. Tap water pressure is low and a return valve must be installed to prevent water from flowing back. If the water pressure is too low and water cannot be supplied normally, a booster water pump should be installed to. solve the problem;
2. The connecting water pipe has excessive bend somewhere, resulting in internal deflation and poor water flow, causing hot and cold water temperature to fluctuate if the tap water pressure is unstable or. insufficient during bathing, the hot water will also fluctuate hot and cold. This requires replacing a thermostatic water valve to resolve the problem.