I have a hair pulling problem. My house is 18 months old, it is a two story with two bathrooms on the second floor. I have a recirculating line and pump in the basement, hooked up to a 50 gal. gas water heater. The recirculating line ties in to the main hot water line in the basement, just after all the first floor lines branch off. The recirc line then goes to the pump then into the bottom of the water heater. Here is the problem: with the recirculating pump and line working we will have good second story water pressure and fast hot water BUT we run out of hot water...barely enough for one shower. With the recirc. pump unplugged and the two valves (one on either side of the recirc. pump) closed we have a seemingly unlimited supply of hot water, it takes longer to get the hot water (as expected) BUT the hot water pressure at the two tubs drops considerably. So neither situation is ideal. Could the recirc pump be bad? This system did work about 8 months ago, we were slow in recognizing the problem but there was nothing obvious that happened prior to us realizing we were running out of hot water. I appreciate any feedback. Thanks.