I've been told by sources (possibly unreliable) that there is a way that I can maximize the amount of hot water my water heater puts out. It only gives me about 20 minutes of hot water at a time. Is there a way I can fix this. I'm renting so I'm not about to replace the damn thing. Thanks for the help. If you have no idea what I'm talking about then tell me so. I'm looking for a quick fix. Both of my thermostats (upper and lower) are set at 125F.