Thinking caps on?

[Pete Masterson]

Ralph,

I just did the same modification ... took out the original pumps (2)
and the expansion tank and replaced with the ShurFlow variable speed
pump.

I have _no_ "burps" as you describe. The only time the pump switches
on is whenever a valve is opened somewhere, causing a pressure drop
in the system. Perhaps you have a leak that drips under the coach or
into a basement bay...?

Depending on the type of plumbing you have (I have polybutylene, but
that came along well after 84), you may have specific potential leak
sites where a leak of long standing may occur. In my case, the higher
pressure caused the water system emptying valve, that had a hairline
crack of long standing, to fail. No other leaks appeared.

The Sporlan valve on my system controls the flow when you flip the
'fill tank' switch. In that situation, the ShurFlow runs continuously
(that is, until I turned off the water pump switch). So, I presume
that if my Sporlan were letting a small quantity of water seep past,
that it might trigger the Shurflow from time to time.

If you have thoroughly checked all other sources of possible leaks
without finding any, then I'd say you have a Sporlan rebuild in your
future....

Pete Masterson
aeonix1@...
'95 Blue Bird Wanderlodge WBDA 42'
El Sobrante, CA




On Feb 21, 2007, at 8:34 PM, Ralph L. Fullenwider wrote:

> Hi everyone:
>
> Here is a fun one perhaps.
>
> Water pump new, 5.7 gpm 65 psi
>
> Pump cycles after initial pressure up. The cycle is a slight burp
> about
> every 10 to 15 seconds. This normally indicates a water leak.
>
> Kicker, I have been from one end of the pressure side of the piping
> and no
> water leak. Only think I can think of at this point is perhaps crud
> in the
> Sporlan valve allowing a seepage back into the system causing a
> slight drop
> in pressure at the pump. The anti back flow valve seal is good,
> pulled it
> and checked it out.
>
> Ideas?
>
> Ralph and Charolette Fullenwider
> 84FC35
> Ralph's RV Solutions, Duncan, Oklahoma



[Non-text portions of this message have been removed]