The thermal release device on a Rheem Fury 40 gl activated due to clogged air holes causing overheating. How do I replace this? Rheem is sending the part (free of charge) but I can find no documentation as to how to install.

SOURCE: I have a Rheem glas fury model 22-40 gas water - leaking

once they leak it's time for a new water heater. ther is no way to repair a tank leak

SOURCE: Pilot light won`t stay burning on my hot water

check gas pressure best of luck isn,t set to high best of luck

SOURCE: i have a rheem fury model 22-40 thats gushing

leaking tank, probably rusted at weld. replacement is the only sure cure.

SOURCE: Slight water leak from plastic drain fitting on

If it is leaking out of the valve spout itself I would just get a garden hose end cap and screw that on the drain threads..These are available at nost hardware stores.
If it is leaking around where drain valve is threaded into tank then turn control knob on gas valve to pilot and shut off water supply to water heater,Drain tank. You will want to open a faucet on the hot side closest to water heater to help tank drain faster. By opening the faucet you stop it from drawing a vacumn on tank and slowing drainage time.Drain tank to a safe locatio and then remove drain valve from tank. Get a 3/4 inch F.I.P. boiler drain and a 3/4 x 2 brass nipple and a roll of teflon pipe tape.Wrap male thread on brass nipple with teflon tape and install in water heater drain hole. Tighten hand tight then use pipe wrench or channel lock pliers to tighten two more turns. Good luck.Thank you P.S. Shut off faucet and fill water heater and check for leaks,

SOURCE: I have a Rheem Fury

Sound slike the top element is gone bad and the bottom one is the only one working. Best bet to change out both elements while you have to replace one anyway , turn power off, drain water out and change out. Once you are done open a faucet to get air out of lines when you turn water back on, Once air is out of lines you now can turn power back on.