It's obvious why Plumbdog10 is a pipe fitter and not a service plumber. I do not believe your problem is sediment. As Rick pointed out you have a strainer on your regulator which should clog with sediment before sediment goes through your house. If you are convinced you have sediment in your main you should install a replaceable cartridge type sediment filter at the connection to your coach.
I don't recall ever being in your community but did spend some time in DeSoto, Kansas during a cross country motorcyle ride. Both communities take water from the same treatment plant and I do not recall the water being that hard. I went to your water companies web site and checked the hardness of your water. While it is hard it is nowhere near as hard as the water is where I live.
It sounds like you may have some disolved magnesium and calcium in your pipes rather than sediment. The scaling in your water heater is likely calcite. I've seen as much as 200 pounds of sediment in some homes with really hard wells. Cleaning sediment out of your water heater on a regular basis is normal maintanance and will save you on your energy bills.
Good luck with your problem but it is hard to give you exact answers without being there. Again if you really think it is sediment from the main the filter I recommended will show it fairly quickly. If your coach is connected with a 3/4" flex it will only take a few minutes to install the filter.
[ 07-22-2005, 11:56 PM: Message edited by: ToUtahNow ]