Water at the base of the tank is the most alarming-looking leak and the most misdiagnosed one. Here is the thing: the puddle ends up at the bottom no matter where the water comes from. Gravity does that. Before you assume the tank is dead, work through the actual possibilities — in order of likelihood.
Step 1: shut it down (two minutes)
Turn the cold-water inlet valve clockwise until it stops. Gas: control knob to pilot or off. Electric: flip the dedicated breaker. Everything below is diagnosis, not repair — but do this first regardless, because a leak you are watching is a leak that is still feeding.
Suspect 1: the drain valve
That little spigot near the base is the drain valve, and in hard-water country it is the single most common source of bottom water. Plastic originals crack, washers give up, and mineral crust keeps them from sealing. Look closely: is the drip coming from the spout itself? If yes, you are probably looking at a valve replacement, not a new heater.
Suspect 2: condensation — or a leak from above
Water runs down. A weeping fitting at the top, a sweating cold inlet pipe, or a TPR discharge line routed downward can all deposit water at the base. Dry the tank shell completely with a towel, then watch where moisture reappears first. Desert garages sweat in humid stretches, so give it an honest test before concluding anything.
Suspect 3: the TPR discharge pipe
Find the small pipe coming off the side of the tank. If it routes down toward the floor and it is wet inside or dripping, your ‘bottom leak’ is actually a TPR valve discharging — a pressure or temperature issue, and a different repair entirely. Do not cap it; that pipe is the tank’s safety release.
Suspect 4: the tank shell itself
This is the one that means replacement. Signs: water weeping directly from the steel body rather than any fitting or valve, rust streaks running down the jacket, or a base that stays damp no matter what gets tightened or dried. When the shell goes, patching is wishful thinking — the corrosion is systemic.
The 30-second triage
Dry it, watch it, note exactly where water reappears — drain spout, running down the shell, or seeping from the steel itself. Shut the water and heat source off, then call (833) 713-2101 and tell us which one you saw. That thirty seconds of observation saves a lot of diagnostic time.