Hot water shortage
We have a 2 person Jacuzzi tub which can maintain temperature of the water. The nominal fill is 72 gallons.
We have a 75 gallon LP gas hot water heater that is 5 years old.
When we try to fill the tub, if we run only the hot water, The hot water becomes lukewarm and then cold before we are even 3/4 full.
The hot water tank has been thoroughly flushed. We have a softener so the tank seems to stay very clean.
The initial hot water temperature is about 120 degrees.
The distance to the tub from the hot water heater is about 30 feet and the pipe is insulated.
Is there something wrong with our hot water heater?