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07-03-2008, 04:52

Online conversion calculator

http://www.sengpielaudio.com/ConvPress.htm

Kurt Horvath
95 PT-42
10AC

--- In WanderlodgeForum@yahoogroups.com, Pete Masterson
wrote:
>
> No. It is apparently assumed that you'll know what to do. (These
are
> mostly installed by professional plumbers.) The only instructions
I
> found in a brief online search stated: The accumulator tank is
> precharged at 0.8 bar. If your pump's cut-in pressure is different
> you may have to customize the tank to best fit your installation.
It
> goes on to explain how to check and adjust the pressure in the
tank.
> See:
> <http://www.johnson-pump.com/JPMarine/products/IB_Pdfs/
> IB-201_Acctank.pdf>
>
> I note that this appears to be from a Swedish company and English
is
> not the primary language. I leave it to you to figure out what 0.8
> bar is in psi. English instructions are on page 4 of this pdf.
>
> Pete Masterson
> '95 Blue Bird Wanderlodge WBDA 42
> El Sobrante CA
> aeonix1@...
>
>
>
> On Jul 2, 2008, at 5:36 PM, Al wrote:
>
> > Is it marked on the accumulator how much air pressure one is
supposed
> > to put into the unit?
> >
> > Al Johnson
> > '96 BMC B100
> > Mandeville, Louisiana
> >
> > --- In WanderlodgeForum@yahoogroups.com, Pete Masterson
> > wrote:
> >>
> >> It's actually an "accumulator tank" that accumulates pressure for
> > the
> >> water system. It's often located near the main water pump. It
will
> >> look like a canister of about 6 to 8" in diameter and perhaps 12
> > to
> >> 14" tall. Mine was painted blue. There will be a schrader valve
on
> >> one end. This allows you to pressurize the diaphragm, if it loses
> >> it's 'charge.' Normally you'd fill it with air to about the
> > expected
> >> water pressure in the system, that puts the rubber diaphragm at
> > the
> >> minimum stretch. As pressure drops, the diaphragm pushes on the
> > water
> >> side of the accumulator tank (giving you water pressure). As
water
> >> pressure is recovered by the pump, it will push the diaphragm
back
> >> against the trapped air.
> >>
> >> Almost all water pump systems (home or RV) have them (sized for
> > the
> >> water demand). The usual maintenance issue is that the air
> > pressure
> >> has been lost (just put a compressor on it and pump it back up)
or
> >> the diaphragm has failed (in which case the accumulator tank must
> > be
> >> replaced).
> >>
> >> Pete Masterson
> >> '95 Blue Bird Wanderlodge WBDA 42
> >> El Sobrante CA
> >> aeonix1@
> >>
> >>
> >>
> >> On Jul 2, 2008, at 4:37 PM, Scott Forman wrote:
> >>
> >>> Where is the pressure tank?
> >>>
> >>> Scott Forman
> >>> 86 PT38
> >>> Memphis
> >>>
> >>> --- In WanderlodgeForum@yahoogroups.com, "Ryan Wright"
> >>> wrote:
> >>>>
> >>>> Thank you for the responses. I ordered the 5.7 from
> > pplmotorhomes,
> >>>> and
> >>>> the screen/filter for it. Look forward to installing this. I'm
> > going
> >>>> to go through and tighten any hose clamps I can find before
> >>>> installation, just to be safe.
> >>>>
> >>>> I do think I'll keep the pressure tank. I usually keep the pump
> > off,
> >>>> only turning it on when necessary. The pressure tank allows me
> > to
> >>>> wash
> >>>> my hands and flush the toilet a couple of times without turning
> > the
> >>>> pump on, which is nice, especially in the middle of the night.
> >>>>
> >>>> Appreciate the replies!
> >>>>
> >>>> -Ryan
> >>>> '86 PT-40 8V92
> >>>>
> >>>
> >>>
> >>>
> >>> ------------------------------------
> >>>
> >>> Yahoo! Groups Links
> >>>
> >>>
> >>>
> >>
> >
> >
> >
> > ------------------------------------
> >
> > Yahoo! Groups Links
> >
> >
> >
>

07-03-2008, 04:56

Leroy,

> Does this look like your pump?

Yep, that's it. Holy cats, $469?! I think I'll buy a rebuild kit for
the pump portion of mine and keep it as a spare. Actually, I have
THREE of these pumps laying around now. One came out of my Travco and
two came with my Bird. All three need to be rebuilt. I had no idea
they were that expensive. I assumed they were old cheapies, inferior
to the newer style beltless pumps.

Are these reliable? I've not been happy with any of mine, but I'll
grant them the fact that all were heavily used when I received them.
They're quite loud. I'm hoping the Sureflo will be much quieter.

> It can run for days without water and not get hot.

I've no idea which pump was the culprit in the event I relayed - it
either wasn't mentioned, or my memory is bad.

-Ryan

07-03-2008, 04:58

Google also has a built in calculator. Just search for "0.8 bar in
psi" and it will calculate it for you. You can put in complex
mathematical formulas, all sorts of neat things and get answers.

-Ryan
'86 PT-40 8V92

On 7/3/08, bumpersbird wrote:
>
> Online conversion calculator
>
> http://www.sengpielaudio.com/ConvPress.htm

07-03-2008, 05:02

Ryan,

Tried the Google calculatoe work great thanks for the heads up.

Kurt Horvath
95 Pt-42
10AC

--- In WanderlodgeForum@yahoogroups.com, "Ryan Wright"
wrote:
>
> Google also has a built in calculator. Just search for "0.8 bar in
> psi" and it will calculate it for you. You can put in complex
> mathematical formulas, all sorts of neat things and get answers.
>
> -Ryan
> '86 PT-40 8V92
>
> On 7/3/08, bumpersbird wrote:
> >
> > Online conversion calculator
> >
> > http://www.sengpielaudio.com/ConvPress.htm
>

07-03-2008, 05:37

In my installation, I connected 3/4" PEX tubing to the existing plastic pipe. To manage the elbows that were removed, the tubing makes large loops from the existing pipes to and from the pumps. (About 20-24" of PEX was used on either side of the pump). This gradual loop does not seem to affect the pump output. I measure 65 psi at the outside faucet near the hook ups when the pump is operating.

3/4" PEX is more trouble to work with than 1/2" (it doesn't bend as easily or in as tight a loop) -- but I recommend using it with the in and out sides of the pump.

Pete Masterson

'95 Blue Bird Wanderlodge WBDA 42

El Sobrante CA

"aeonix1@mac.com"

On Jul 3, 2008, at 11:23 AM, David Brady wrote:

I checked and Shurflo specifies that the Shurflo Smart
Sensor Extreme 5.7 gpm water pump should have
at least 18 inches of elbow free tubing both at the inlet
and at the outlet.Â

To quiet the pump even further I mounted it using a Jabsco
vibration pad kit, part number 43990-0058. These legs
provide much more vibration dampening than the original
Shurflo legs. With the Jabsco legs, the pump is pretty quiet.

David Brady
'02 LXi, NC

David Brady wrote:
Ryan,

A call to Shurflo might be worth it regarding its use with the
pressure tank. The installation instructions are pretty clear
in that there shouldn't be any elbows, or other obstructions,
within x distance from the pump outlet. These kinds of
obstructions can reflect the water pressure tricking the pump
into thinking that the water line is pressurized (when it's actually
only the pressure in the pressurized tank). You may end up
with pressure oscillations if you keep the pressure tank. Give
it a try. If you have oscillations, then remove the pressure
tank.

David Brady
'02 LXi, NC

Ryan Wright wrote:
Thank you for the responses. I ordered the 5.7 from pplmotorhomes, and
the screen/filter for it. Look forward to installing this. I'm going
to go through and tighten any hose clamps I can find before
installation, just to be safe.

I do think I'll keep the pressure tank. I usually keep the pump off,
only turning it on when necessary. The pressure tank allows me to wash
my hands and flush the toilet a couple of times without turning the
pump on, which is nice, especially in the middle of the night.

Appreciate the replies!

-Ryan
'86 PT-40 8V92
No virus found in this incoming message.

Checked by AVG. Version: 7.5.526 / Virus Database: 270.4.3/1529 - Release Date: 7/1/2008 7:23 PM

 
No virus found in this incoming message.

Checked by AVG. Version: 7.5.526 / Virus Database: 270.4.3/1529 - Release Date: 7/1/2008 7:23 PM

 

07-03-2008, 05:41

I had PAR water pump in my 83PT40 that looks similar, and is about
half the price. It never gave me a lick of problems in 9 years of
ownership. That's probably because I had a new spare in the basement
compartments. My theory is that if you have spares on board, that's
the surest way to make sure the original part never breaks. Go
figure.....

Mike Bulriss
1991 WB40 "Texas Minivan"
San Antonio, TX

--- In WanderlodgeForum@yahoogroups.com, "Ryan Wright"
wrote:
>
> Leroy,
>
> > Does this look like your pump?
>
> Yep, that's it. Holy cats, $469?! I think I'll buy a rebuild kit for
> the pump portion of mine and keep it as a spare. Actually, I have
> THREE of these pumps laying around now. One came out of my Travco and
> two came with my Bird. All three need to be rebuilt. I had no idea
> they were that expensive. I assumed they were old cheapies, inferior
> to the newer style beltless pumps.
>
> Are these reliable? I've not been happy with any of mine, but I'll
> grant them the fact that all were heavily used when I received them.
> They're quite loud. I'm hoping the Sureflo will be much quieter.
>
> > It can run for days without water and not get hot.
>
> I've no idea which pump was the culprit in the event I relayed - it
> either wasn't mentioned, or my memory is bad.
>
> -Ryan
>

07-03-2008, 06:23

I checked and Shurflo specifies that the Shurflo Smart

Sensor Extreme 5.7 gpm water pump should have

at least 18 inches of elbow free tubing both at the inlet

and at the outlet.

To quiet the pump even further I mounted it using a Jabsco

vibration pad kit, part number 43990-0058. These legs

provide much more vibration dampening than the original

Shurflo legs. With the Jabsco legs, the pump is pretty quiet.

David Brady

'02 LXi, NC

David Brady wrote:

Ryan,

A call to Shurflo might be worth it regarding its use with the

pressure tank. The installation instructions are pretty clear

in that there shouldn't be any elbows, or other obstructions,

within x distance from the pump outlet. These kinds of

obstructions can reflect the water pressure tricking the pump

into thinking that the water line is pressurized (when it's actually

only the pressure in the pressurized tank). You may end up

with pressure oscillations if you keep the pressure tank. Give

it a try. If you have oscillations, then remove the pressure

tank.

David Brady

'02 LXi, NC

Ryan Wright wrote:
Thank you for the responses. I ordered the 5.7 from
pplmotorhomes,
and

the screen/filter for it. Look forward to installing this. I'm going

to go through and tighten any hose clamps I can find before

installation, just to be safe.

I do think I'll keep the pressure tank. I usually keep the pump off,

only turning it on when necessary. The pressure tank allows me to wash

my hands and flush the toilet a couple of times without turning the

pump on, which is nice, especially in the middle of the night.

Appreciate the replies!

-Ryan

'86 PT-40 8V92
No virus found in this incoming message.

Checked by AVG. Version: 7.5.526 / Virus Database: 270.4.3/1529 - Release Date: 7/1/2008 7:23 PM
No virus found in this incoming message.

Checked by AVG. Version: 7.5.526 / Virus Database: 270.4.3/1529 - Release Date: 7/1/2008 7:23 PM

07-03-2008, 09:03

I just replaced the PAR belt driven pump in my "83 FC with a 2.8
ShurFlo that I got new off Ebay for $55 and free shipping.
I hooked it up with the existing accumulator and seem to be getting
better flow and pressure than the PAR. It operates at 45psi so I
don't have to worry about the pressure or water usage to be excessive.

Dan
BuckeyeBird

--- In WanderlodgeForum@yahoogroups.com, erniecarpet@... wrote:
>
> One thing about the increased gpm, is the extra flow into your gray
tank.
> Might fill up too fast.
>
> Ernie Ekberg
> 83PT40
> Livingston, Montana
>
>
>
>
> **************Gas prices getting you down? Search AOL Autos for
> fuel-efficient used cars. (http://autos.aol.com/used?
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>