The control to adjust the water
temperature on our low
pressure hot water system is behind a blue plastic panel.
I increased it by 12 degrees
recently.
We talked about installing a spring
loaded mechanical wall timer, but so far it's not been a problem
remembering to shut it off.
I have had a switch on my water heater for probably 20 years. It's similar to this one: http://www.homedepot.com/p/t/100685853?storeId=10051&productId=100685853&langId=-1&catalogId=10053&ci_src=14110944&ci_sku=100685853&cm_mmc=shopping--googlebase--D27X-_-100685853&locStoreNum=577&marketID=8#.UppxPdJDuo4
I set it for two hours in the am and two hours around bed time. It has given no problems in that time. I can't remember ever running out of hot water
I expect to see the obligatory hot tub soak picture when the tub gets installed.
That's such a luxury to have available.