Cold Water Pressure

[Gardner Yeaw]

Bill, Dave,
My 78 also has high hot water presure. I noticed when I turned off
the pump and opened up the kitchen sink fawcet, the hot ran for quite
a while longer than the cold. There must be somewhere where air gets
compressed in the system that maintains the pressure, but unless the
hot water tank is not completely full, I don't know where.

I did have a problem on one trip. When I arrived at the RV park
there was alot of hot water leaking from the emergency bypass valve
on the hot water heater. I opened the sink fawcet and there was lots
of presure, once it normalized everything was fine. I haven't had
that problem since.

I beleive there are one way valves to prevent hot water from
running back into the supply lines, so this would allow the expanding
hot water to build pressure, which has no escape route other than the
fawcets or the presure releif valve.

Gardner
78FC33


--- In WanderlodgeForum@yahoogroups.com, "dthollis1961"
wrote:
>
> Bill,
>
> I had water pressure problems with my 84FC that were different than
> yours, but maybe there is some connection. My air operated valve
on
> the cold water intake of the WH has 3 lines run to it:Cold water
> line, air line, and drain line. As I see it, my valve only
controls
> filling and draining of the water heater with the blow-out plumbing
> being elsewhere. After draining the HWH, I could get very little
> HOT water pressure. Thanks to Tom W., I found that the air
operated
> valve was stuck between the "fill" and "drain" positions. I took
> the end cap off of the valve and manually moved it to the "fill"
> position and that took care of the problem. It takes air to move
my
> valve to "drain", but there must be a spring in there to move it
> back to "fill". Sounds like yours if plumbed differently, but
maybe
> something is up with that air valve.
>
> David Hollis 84FC35 Springfield,IL
>
>
> --- In WanderlodgeForum@yahoogroups.com, "pattypape"
> wrote:
> >
> >
> >
> > Hi All,
> >
> >
> > I am happy with the domestic water pressure.
> >
> > I am just curious as to, Why the cold water pressure is less
than
> the
> > hot water pressure. Has anyone else noticed this phenomena???
> >
> > Also, on the hot water heater Cold inlet, there is an air pressure
> > operated Versa Products valve. This is operated to blow out the
> water
> > lines with coach air for winterization.
> > So, Why is there three cold water lines hooked to this valve, that
> > enter the cold side of the hot water heater ???
> > Could this valve contribute to the lower water pressure on the
cold
> > water line????
> >
> > Bill 88 FC Michigan
> >
>