It started gradually a few months ago, and now we almost no cold water coming into our mobile home (it's only six years old). Seems it must be from our hard water and calcium carbonate build up, but we don't know how to back flush. Should we use water under pressure or compressed air or? Any ideas appreciated. Thanks!

First tell us the source of your water. City or pump? Now how old is your unit? What's the water pipe made of? Back to you, Tom

I'm assuming your hot water pressure is bad also? Do you have any filters or a water softener? Please answer Toms questions and we will do our best to help out. Lee.

Tom and Lee... I hope I'm responding correctly... my computer skills are pitiful!
It seems to us the biggest mystery is that this is only with the cold water. We have our own well. In case it matters, we pump water 250 ft up a hill to the holding tank, and then gravity feed back down to the house. The mobile home is six yrs old, the pump is old but has recently been inspected and found sound. The water pipe in the house is high-tech flexible tubing that's now being used in new construction. We have neither filters or a water softner. Whew, hope that explains it. Thanks so much again.

This is a mystery. If you have better hot water pressure than cold in all fixtures, then you are getting good cold water supply to water heater, but somewhere before water heater where it branches off to supply other fixtures with cold water there is a problem, check to make sure all valves are completely open.