Herk is almost right, but if the relief valve leaks doesn't necessarily mean it is bad.
But if it does leak when you finish your project of reinstalling the zinc rod. Try this.
If the relief valve leaks, turn off your water supply (turn off pump also.)
Open the hot water faucet in the kitchen sink, leave open. Now go to the relief valve, lift up on the leaver to bleed any water off until the water stops running at the relief valve. Snap the valve shut a couple of times
(it is spring loaded). No go back to your kitchen close the hot water faucet side. Turn water pressure back on. Nine times out of if your pressure relief valve weeps water, you do not have a air pocket in the top of the hot water tank. This is a must to prevent the weeping of water at the pressure relief valve.
Sid, Lois & HRH MISSY Terrible 2s SHIH TZU
2011 ROCKWOOD 8285 WS
2014 F-250 KING RANCH PS/SD/6R140/BFT
BOLIY PRO 3600SI GEN
DAYS CAMPED 2016 57 DAYS