I have what is supposed to be a water saver in 2 of my bathrooms (same shower head in both). Both bathrooms are on the same floor. One shower is perfect, and I can take over an hour shower without running out of hot water. The other shower has extremely high pressure and I run out of hot water after about 15 minutes. What can I do to fix it?

What size is your water heater? Regards, Tom

40 gallon, gas heated.

" One shower is perfect, and I can take over an hour shower without running out of hot water."
This I'll have to see from a 40 gallon heater. As you pull hot water out of a heater cold water enters at the same rate and pressure. This will cool down what water's left in the tank as more cold water enters. Finally you will have nothing but cold or luke warm water left. It would appear that you have solved that age old problem of putting 5 pounds of crap into a 3 pound bag.
Regards, Tom

Why does this only affect one shower and not the other? There is nothing I can do?