Yesterday morning when I went to take a shower I found that I had no hot water. Somehow the pilot light went out. Ken came over and helped me get it started again. It keeps going out though. We had a plumber come look at it an said it would cost about $400 to repair it, between $970 – $1500 to replace it. We currently have a 40 gallon tank, be we run out quickly so I want to replace it with a 50 gallon tank. I found them at Home Depot for...