I assume you mean a relief valve on a hot water tank. According to the tag on it it should be "popped" once a year by the home owner or a professional (Be careful not to scald yourself if you choose to do this yourself, the water is HOT) to ensure proper function. Proper function means it holds water properly after it has been "popped".
It may leak after it has been opened. That can normally be fixed by popping it open a few times and washing any debris out of it. There is no guarantee however that it wil reseal properly. If it fails to stop dripping it must be replaced. NEVER CAP A DEFECTIVE RELIEF VALVE. See YouTube mythbusters video on blowing up a hot water tank to see why.
The tag says that it should be inspected by a Plumbing professional once every 3 years. If it is not working properly that it should be replaced.
I have replaced relief valves that were 2 years old, however, I have seen 20 year old tanks that still had the original relief valve on it. So to answer your question if it leaks or fails to open on its test, replace it. If not then don't.
The correct way is to REMOVE the T&P every three years and physically inspect it BUT since it is already out may as well as replace it
If your going to ask a "plumber" about safety devices ask them if they took the ASME section IV course or studied the NBBI code and are the familiar with NFPA 54
no water should be coming out of the safety valve , only if water over a certain temp orthan creates a pressure if water coming out and water not steaming than replace valve
Your boiler relief valve may be leaking due to high pressure or a faulty valve. To fix it, first check the pressure gauge and adjust if necessary. If the issue persists, you may need to replace the relief valve with a new one.
That would depend on which part of the system the RELIEF valve is located
To replace a hot water heater pressure relief valve, first, turn off the power and water supply to the heater. Drain some water from the tank to relieve pressure. Use a wrench to unscrew the old relief valve and remove it. Wrap the threads of the new relief valve with plumber's tape and screw it into place. Reconnect the water supply and power, then test the new valve for proper function.
The oil relief valve is a spring,check ball,and roll pin made into the oil pump.If your relief valve is in doubt replace the whole pump (less than $20.00) It's cheap insurance.
To prevent a pressure relief valve from leaking, regularly inspect and maintain the valve, ensure it is properly installed and calibrated, and replace it if necessary. Additionally, follow manufacturer guidelines and industry best practices for proper operation and maintenance of the valve.
To replace the pressure relief valve on a water heater, first, turn off the power and water supply to the heater. Allow the water to cool down. Next, locate the valve on the top or side of the heater and unscrew it using a wrench. Replace it with a new valve of the same size and pressure rating. Finally, turn the water and power back on and check for leaks.
To replace a pressure relief valve, first, turn off the power supply and water source. Next, drain the water from the system to relieve pressure. Then, remove the old valve by unscrewing it from the tank. Install the new valve by screwing it in place and reconnecting the water supply. Finally, turn the power back on and test the new valve to ensure it is working properly.
Replace the pressure relief valve.
Is the temperature relief valve leaking in your system?
The relief valve is part of the oil pump.
pressure relief valve relief the excess pressure which is developed in the syatem, while pressure reducing valve reduces the pressure and supply it to the system.