well lets start in the begining. Ive had the city test the pressure at the outside spiggot that T's into the house line and its within their specs for pressure and output. Now Ive drained down the house more than once. Ive disconnected the main line and looked for blockage NONE. Ive opened all the faucets and let it run for 15 min or so and still no pressure change. Ive drained down my hot water tank cleaned out the sediment recently and replaced both elements. This had got me perplexed. Any help would be appreciated.

I am not that familar with plumbing details in a mobile home, although I owned one about 35 years ago.

What was the pressure that the city measured?

Just how are the connection to the city made? Step by step how does the water flow?

And this will vary dependent on the climate, but you have a meter, in a pit? And after the meter there is a main shut off? And if you shut tht off then the outside spiggot does not work?

The line is then t'd to feed the spiggot and the home?

Is there another shutoff to the home?

Is there a pressure regulator in the system? Filter? Watersoftener?

Is the problem with low flow (and not pressure) common to ALL faucetts both hot and cold?

Have you removed the aerator and check the screw for dirt? You kitchen and basin faucets will have one. A shower head does not have one, but still has a restriction that can be come clogged. But a bath filler does not.

I dont remember the pressure but it flows like a champion out the spiggott where it was measured.

The water flows from city water to a meter thru a shut-off valve..(its open all the way/so is the meter cutoff) up to a T fittting then one end goes to the outside spiggott the other runs to the main line in the house.There are no more shutoff valves in the system below the house. All other valves are just before the faucetts in the house. Yes all valvas are fully open. There are no softners or pressure regulators in the system.

I think low flow is is the word im lookinf forabout the faucetts. YES hot and cold are affected. The areators have been removed and cleaned thru the home still low flow. The shower head I removed and even without it on you can tell the difference in the flow of water. It just doesnt flow like it used to.

About all I can give you is that you have an blockage or maybe kink in the supply line.

And it will be someplace before it start Tee'ing off for the hot water and other fixtures.

Probably time to start opening up and disconnecting the lines.

But here is something that you might try.

Make sure ALL of the faucets and shutoffs are closed in the home.

Then disconnect the supply line.

At one of the faucets remove the riser (the line from the stop vavle to the faucet) and connect an air compressor to it and blow the line out backwards.

Becarefull and don't use too much pressure.

And what material is used for the plumbing? And the age of the home?

Ive thought of that but no compressor. Mabey a wet/dry vac i'd thought may work. well i'll let ya know how it works out.
Oh by the way ita all PVC piping.
Mabey its alot of sediment buildup or calcium who knows. would back flushing it with draino or a calcium breakdown compound like CLR work too.

On second thought I don't recomment using an air compressor.

And SPECIALLY WOULD NOT RECOMMENT USING ANY CHEMICALS. MANY TOO MANY WAYS FOR IT TO GO WRONG.

And I doubt that on PVC you have an signficiant mineral buildup.

You have good flow at the hose spigot.

Use that to back flush the system.

Go to cold water faucet closes to the line connection (as the problem affects the whole house) and disconnect the riser from the stop valve to the fixture.

Connect the hose there. You will need a hand full of plumbing parts to go from one to the other.

Just wondering if you had resolved your problem, and how you did it?