Phil, I did take out the shower mixing valve and took to lowes, HD etc. Trying to find a better one that would match up with the current fittings, no luck. Then took to plumber supply place and they could only order the same, but they did show me how to take apart, make adjustments to how make handle a bit tighter and works good now. They also said when you put in RV anit-freeze it will gum up the valve some and they recommended cleaning and putting plumbers grease on the mixing valve.
2011: 54 days, 2012: 218 days, 2013: 175 days, 2014: 196 days
2015: 188 days, 2016: 72 days,
2009 Berkshire, 390QS, and toad