Originally Posted by ake
I have a 27 foot Cougar TT with a 5 gal. water heater. I find it very hard to take a shower without running out of hot water. Have not had a trailer in several years, but say 20 years ago the hot water supply was well adequate. Is that the way the newer ones are or is there something I can fix to improve my hot water supply?
Lots of variables here, starting with how you shower, but let's assume you are familiar with the "Navy shower" technique.
It's important to know what brand and model of water heater you have. I am not familiar with a 5 gal. heater, as the two major brands tend to be 6 gal. at the smallest. I include this only because your issue may be the thermostat is not correctly heating the water to the proper temperature and the thermostats are brand specific.
Your hot water should typically be ~140* F at the outlet. If it is less, then you will use more hot water in mixing for a shower and this may be your issue. As a first step, take an accurate measurement of the hot water temperature and report back.
Is your heater gas, electric, or both? If both, do you have the same issue when either source is used?