JRS & B wrote:
I could not find the Watts locally where we are currently staying. 
I ordered a Valterra from the nearest RV shop and paid full retail price right out of the catalog. He will have it in one day. 
Sometimes it is just not worth the time and fuel to chase down a better deal. I guess I only have myself to blame for not taking care of this before we got on the road.
Don't kick yourself too hard, it's difficult to remember everything for a house on wheels.
I need to get one too but am not worried that my plumbing can't handle bigger pressure. I've had it up to 80 psi and no issues. There is always that one time, though. ;)