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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
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Why does water come out from the relief valve so often?
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
How to replace pressure release valve in residential plumbing system?
That would depend on which part of the system the RELIEF valve is located
Where is the oil pump relief valve located on a 1991 pickup?
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.
How do you rectify leaking warm water from the overflow tube on your hot water tank?
Replace the pressure relief valve.
Location of Oil pressure relief valve on Wrangler?
The relief valve is part of the oil pump.
Do all propane tanks have a relief valve?
Propane tanks are required to have a safety relief valve. The relief valve is a safety device on the propane tank to vent excess pressure.
What is difference between pressure reducing valve and pressure relief valve?
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.
What is a tell tale on a relief valve?
A tell tale on a relief valve is a small opening or connection that allows excess fluid to escape when the relief valve opens. It is used to visually indicate when the relief valve is relieving pressure and discharging fluid. Tell tales are important for monitoring the performance and functionality of relief valves in a system.
What does converter relief valve do?
Converter relief valve ensures high line pressure does not flood/overrun the solenoid.
Where is the oil pressure relief valve on an LS2?
The high oil pressure relief valve is located in the oil pump
What is Difference between relief valve and safety valve?
Relief valve always position in the suction line in oreder to relief the extra pressure, while safety valve is always placed at discharge line to release excess pressure.I would take that one step further by stating that a " RELIEF VALVE" is one that is "meant" to be lifted off its seat, as opposed to a "SAFETY RELIEF VALVE" which is not!DIFFERENCE BETWEEN RELIEF VALVE AND SAFETY VALVE:1. Releif valve is applicable in the fluid system.safety valve is applicable in the gaseous system.2.Relief valve opening is directly proportional to the pressure rise.Safety valve opening is will happen at after reaching the setpressure.3.Mode of relif vlave line is again connected to the suction.But in the safety valve is just vent-out there is no connection tosuction.
How often you need to replace the EGR valve?
No set time...just at failure
