Low water pressure (hot water only) - temp fix when I shut off water supply to tank
Sometimes there are check valves at the hot water tank inlet and outlet, intended to prevent eddy currents in the water from losing heat in the piping just above the tank. These could malfunction or become clogged with sediment. Some folks don't install them, but removing them is not that simple.
These check valves are not readily identifiable; if present they are incorporated into the first short pipe segments (nipples) screwed into the tank.
Turn off the water heater heat before draining any significant amount of water from the heater, and have a hot water faucet gushing water upstairs before turning the heat back on.
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Last edited by AllanJ; 11-15-2012 at 07:58 AM.