Water pump

[Pete Masterson]

The shore water (on my coach) passes through a pressure reducer that's built into the inbound water connection. As a result, both the shore water (when directed to the plumbing system) and the tank fill (when the Sporlan valve is set) are limited to about 45 psi, regardless of the pressure at the shore water faucet. 

I note that pressure reduction and flow rate are related, but pressure regulators with that minimize flow rate loss seem to be a bit more expensive than what is likely installed on the WL and some other RVs. (I've never looked too closely at the water input on an SOB.)

The out bound overflow pipe seems to easily handle the 45 psi pressure -- but it may be likely that a larger overflow pipe would be required for a higher pressure. I note that the overflow pipe on my coach takes a rather circuitous route to the overflow point and seems to be a mixture of plastic plumbing pipe and tubing that's attached with simple hose clamps. Obviously not intended for any serious water pressure.

This article explains the difference between water flow and pressure:

<http://www.rvwaterfilterstore.com/ABPressure.htm>

Here are some pressure regulators, some that will maximize actual flow rates:

<http://www.rvwaterfilterstore.com/Pressu...lators.htm>

Pete Masterson

'95 Blue Bird Wanderlodge WBDA 42

El Sobrante CA

"aeonix1@mac.com"

On Feb 12, 2008, at 6:22 PM, Gregory OConnor wrote:

I got a phone call from a member looking to bypass the electric tank 

fill and install a fresh water tank fill port independent of the 

sole shore water hookup. MarkD 1988pt40 said his tank takes forever 

to fillup like there is a restriction some place. Curt and others 

posted about this issue also.  Then I remember Macy post the 

term "Engineer" and realized there must be more to it.

I notice that tankfills on sob's are not dripless threaded on. I 

wonder if this design is to keep the fill water hose pressure from 

splitting the fresh water tank?????? 

 I also wonder if the slow fresh water tank fill common with the  

Wonderlodges  is a design limit???? to keep the overflow above the 

design limit of the input??????? 

I can see that with the 110 psi one inch meter at my yard I could 

split a tank if the overfill could not keep up with the 30 gpm!!! 

This is a consideration with modifying the fill setup

GregoryO'Connor

94ptRomolandCa

--- In "WanderlodgeForum@yahoogroups.com", "Macy Neshati"  

wrote:

Thanks Gregory, I have engineering looking into the backflow valve 

location

you suggested in this post.

Travel safely

Macy

Macy Neshati

www. completecoach.com  http://www.thelegacyreturns.com 

http://www.bluebirdcoachworks.com

email: macy@...

Cell: 951 836 6525  Office: 951 684 9585 Fax: 951 684 2023

1863 Service Court

Riverside, CA 92507

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