Water heater relief valve, T&P or TPR valve is a safety device that is temperature and pressure sensitive and designed to limit its levels in the tank type heaters.nce the relieving point of the water heater relief valve is reached, it will release the excess pressure with the hot water and allow cooler water to enter the tank and lower the temperature. The T&P regulator has a probe immersed in the first six inches of the water heater, to measure the stored water temperature.
What is 'Manipulation' Manipulation is the act of artificially inflating or deflating the price of a security or otherwise influencing the behavior of the market for personal gain. Manipulation is illegal in most cases, but it can be difficult for regulators and other authorities to detect.
What is MANIPULATED VARIABLE? An independent variable one can alter to get a particular effect. For example, for a period of time to see how one's weight changes in response, one can lower one's calories intake, as calories is the manipulated variable, to learn if one's weight depends on the amount of calories one consumes. Evaluating Life Insurance Policies and Provisions.