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| [GMCnet] Water System [message #301244] |
Sun, 29 May 2016 07:14  |
Dolph Santorine
Messages: 1236
Registered: April 2011
Location: Wheeling, WV
Karma: -41
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I’ve seen what’s in the manuals from the new scans (which are terrific, thanks to the crew that made those happen).
I’m still not clear on the plumbing, and was wondering if someone had a better schematic?
The point of this is plumbing in my on demand hot water heater. I was just going to put it on the cold water side of the input to the engine/electric tank that is there now, but there is a diverter valve there (PO?), and I wanted to know what others have done.
Thanks.
Dolph
DE N8JPC
Wheeling, West Virginia
1977 26’ ex-PalmBeach
1-Ton, Sullybilt Bags, Reaction Arms, 3.70 LSD, Manny Transmission, EV-6010
“The Aluminum and Fiberglass Mistress"
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| Re: [GMCnet] Water System [message #301292 is a reply to message #301244] |
Mon, 30 May 2016 18:11  |
zhagrieb
Messages: 676
Registered: August 2009
Location: Portland Oregon
Karma: 0
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Dolph,
i plumbed mine in parallel with the electric heater with selector valves so I can use either.
Glenn Giere, Portland OR, K7GAG
'73 "Moby the Motorhome" 26'
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| Re: [GMCnet] Water System [message #301299 is a reply to message #301292] |
Mon, 30 May 2016 21:09 |
Dolph Santorine
Messages: 1236
Registered: April 2011
Location: Wheeling, WV
Karma: -41
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Thanks, Glen:
I was poking around the parts coach today, and it looks like the PO on my main coach did some creative plumbing around the Hot Water tank, so I’m going to be pulling the “Toilet Paper” module later this week and getting into it.
It appears there is a regulator/check valve where the water enters the coach. I still have not figured out where the check valve that keeps city water from backing up to the on board pump (which is getting some new plumbing … what’s there does not look like it’s fit for potable water).
Any idea’s on where to look for the other check valve?
Thanks.
Dolph
DE N8JPC
Wheeling, West Virginia
1977 26’ ex-PalmBeach
1-Ton, Sullybilt Bags, Reaction Arms, 3.70 LSD, Manny Transmission, EV-6010
“The Aluminum and Fiberglass Mistress"
> On May 30, 2016, at 7:11 PM, Glenn Giere wrote:
>
> Dolph,
> i plumbed mine in parallel with the electric heater with selector valves so I can use either.
> --
> Glenn Giere, Portland OR, K7GAG
> '73 "Moby the Motorhome" 26'
>
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| Re: [GMCnet] Water System [message #301301 is a reply to message #301299] |
Mon, 30 May 2016 21:51 |
emerystora
Messages: 4442
Registered: January 2004
Karma: 13
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Dolph
I believe the pump has a built in check valve.
Emery Stora
> On May 30, 2016, at 8:09 PM, Dolph Santorine wrote:
>
> Thanks, Glen:
>
> I was poking around the parts coach today, and it looks like the PO on my main coach did some creative plumbing around the Hot Water tank, so I’m going to be pulling the “Toilet Paper” module later this week and getting into it.
>
> It appears there is a regulator/check valve where the water enters the coach. I still have not figured out where the check valve that keeps city water from backing up to the on board pump (which is getting some new plumbing … what’s there does not look like it’s fit for potable water).
>
> Any idea’s on where to look for the other check valve?
>
> Thanks.
>
> Dolph
>
> DE N8JPC
>
> Wheeling, West Virginia
>
> 1977 26’ ex-PalmBeach
> 1-Ton, Sullybilt Bags, Reaction Arms, 3.70 LSD, Manny Transmission, EV-6010
>
> “The Aluminum and Fiberglass Mistress"
>
>
>
>
>
>> On May 30, 2016, at 7:11 PM, Glenn Giere wrote:
>>
>> Dolph,
>> i plumbed mine in parallel with the electric heater with selector valves so I can use either.
>> --
>> Glenn Giere, Portland OR, K7GAG
>> '73 "Moby the Motorhome" 26'
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
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| Re: [GMCnet] Water System [message #301305 is a reply to message #301304] |
Tue, 31 May 2016 08:15 |
tphipps
Messages: 3005
Registered: August 2004
Location: Spanish Fort, AL
Karma: 9
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If you go to the expense of installing new water check valve, suggest installing a pressure regulator also. Some parks have high pressure, more that you need in the coach.
Tom,MS II
2012 Phoenix Cruiser model 2552
KA4CSG
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| Re: [GMCnet] Water System [message #301354 is a reply to message #301305] |
Wed, 01 June 2016 06:38 |
Dolph Santorine
Messages: 1236
Registered: April 2011
Location: Wheeling, WV
Karma: -41
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Senior Member |
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Thanks everyone -
A lot to learn-
The Shurflo 183-02918 that is on the coach is not original, and is a regulator and a check valve. It makes no claim to “anti-siphon” or “back flow resistant”.
It’s limited to 125 PSI input. I tested it, and it works. Water pressure at the “Toy Box” (the Garage) is 85 PSI, and there is 65 in the coach.
On their pumps, they claim that an external check valve is not required, but it’s part of their catalog (go figure),
Off to order in a check valve.
Dolph
DE N8JPC
Wheeling, West Virginia
1977 26’ ex-PalmBeach
1-Ton, Sullybilt Bags, Reaction Arms, 3.70 LSD, Manny Transmission, EV-6010
“The Aluminum and Fiberglass Mistress"
> On May 31, 2016, at 9:15 AM, Thomas Phipps wrote:
>
> If you go to the expense of installing new water check valve, suggest installing a pressure regulator also. Some parks have high pressure, more that
> you need in the coach.
> Tom,MS II
> --
> 1975 GMC Avion
> KA4CSG
>
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| Re: [GMCnet] Water System [message #301355 is a reply to message #301244] |
Wed, 01 June 2016 09:01 |
bdub
Messages: 1578
Registered: February 2004
Location: Central Texas
Karma: 5
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What? No links? Diagrams?
I'm probably the only one, but this sounds about as simple as sorting out a
can of worms to me.
duh ...
bdub
On Wed, Jun 1, 2016 at 8:11 AM, Ken Henderson
wrote:
> For those concerned about leaving external water pressure applied to their
> coach, one of my recent modifications may be of interest: Available on the
> 'net are 1/2" 12 VDC solenoid valves. Also available, very inexpensively,
> are control boards which can be used with those valves. 3 leads from the
> board are Common, Low, and High. With those connected to two well nuts
> placed at the desired minimum level in the storage tank (Common & Low), and
> one at the desired maximum level (High) the tank level can be controlled.
> With the solenoid valve connected to +12 VDC via the on-board relay, the
> valve will open when the water level falls below the lower two well nut
> contacts and remain open until the water reaches the upper contact. Thus,
> the water level is always kept between minimum and maximum.
>
> If that solenoid valve is mounted on the external water supply fitting (the
> back of the connector/pressure regulator) and plumbed to the storage tank
> inlet, external pressure is inside the coach ONLY while the tank is being
> filled; not a likely time for the pressure to rupture a line.
>
> There are a number ofl possible variants on this theme. In my case, I
> still admit external pressure and the control system serves only to keep
> the tank "filled"; I no longer need to get down and manually open a ball
> valve to fill the tank. Someone really concerned about the external water
> supply could even run the leads to the solenoid valve all the way to the
> faucet and mount the valve there. That would eliminate the most common
> leaks -- the hose itself or one of its connectors. In my installation, I
> wanted to be able to override the control circuit to finish filling a
> partially emptied tank; a momentary normally closed switch (labelled "Force
> Fill") in the Low sensor circuit fools the control into thinking the water
> is below minimum. If a SPST switch is installed in the +12 VDC supply, the
> whole system can be shut down, interrupting the fill cycle.
>
> The possibilities are myriad -- one might even consider putting a bypass
> valve around the solenoid valve just in case there's a failure of the
> control or the valve.
>
[color=blue]> At
bdub
'76 Palm Beach/Central Texas
www.bdub.net
www.gmcmhphotos.com
www.gmcmotorhomemarketplace.com
www.gmcmhregistry.com
www.facebook.com/groups/classicgmcmotorhomes
www.facebook.com/groups/gmcmm
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| Re: [GMCnet] Water System [message #301357 is a reply to message #301355] |
Wed, 01 June 2016 09:58 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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Now what could be simpler than that? 3 cans: 1 for the mixed worms, 1 for
the wigglers, 1 for the redworms...
If anyone's really interested, I'll try to find something, though the
control board comes with instructions (in Chinese). :-)
Ken H.
On Wed, Jun 1, 2016 at 10:01 AM, Billy Massey wrote:
> What? No links? Diagrams?
>
> I'm probably the only one, but this sounds about as simple as sorting out a
> can of worms to me.
>
> duh ...
> bdub
>
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] Water System [message #301358 is a reply to message #301357] |
Wed, 01 June 2016 10:06 |
emerystora
Messages: 4442
Registered: January 2004
Karma: 13
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Senior Member |
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Ken
Have you designed a circuit to allow one to override the air bag pressure switch so as to allow it to start when it is above the cut off pressure but below the pressure needed to level the GMC?
Right now I have to dump air to get the compressor to start and then pump the bag back up.
Emery Stora
77 Kingsley
Frederick, CO
> On Jun 1, 2016, at 8:58 AM, Ken Henderson wrote:
>
> Now what could be simpler than that? 3 cans: 1 for the mixed worms, 1 for
> the wigglers, 1 for the redworms...
>
> If anyone's really interested, I'll try to find something, though the
> control board comes with instructions (in Chinese). :-)
>
> Ken H.
>
>
>> On Wed, Jun 1, 2016 at 10:01 AM, Billy Massey wrote:
>>
>> What? No links? Diagrams?
>>
>> I'm probably the only one, but this sounds about as simple as sorting out a
>> can of worms to me.
>>
>> duh ...
>> bdub
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| Re: [GMCnet] Water System [message #301364 is a reply to message #301357] |
Wed, 01 June 2016 11:42 |
bdub
Messages: 1578
Registered: February 2004
Location: Central Texas
Karma: 5
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Senior Member |
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I think I'll just keep it the way it is for now. It's near fool proof and
really simple without a bunch of extra valves, switches, and wiring, ...
It is intriguing though.
Billy
-----Original Message-----
From: Gmclist On Behalf Of Ken Henderson
Sent: Wednesday, June 01, 2016 9:58 AM
Now what could be simpler than that? 3 cans: 1 for the mixed worms, 1 for
the wigglers, 1 for the redworms...
If anyone's really interested, I'll try to find something, though the
control board comes with instructions (in Chinese). :-)
Ken H.
On Wed, Jun 1, 2016 at 10:01 AM, Billy Massey wrote:
> What? No links? Diagrams?
>
> I'm probably the only one, but this sounds about as simple as sorting
> out a can of worms to me.
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bdub
'76 Palm Beach/Central Texas
www.bdub.net
www.gmcmhphotos.com
www.gmcmotorhomemarketplace.com
www.gmcmhregistry.com
www.facebook.com/groups/classicgmcmotorhomes
www.facebook.com/groups/gmcmm
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| Re: [GMCnet] Water System [message #301394 is a reply to message #301358] |
Wed, 01 June 2016 19:28 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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Emery,
No, I haven't found that to be a problem. But let's examine it: The
hysteresis in the pneumatic switch causes the SPST compressor switch to
OPEN at a certain pressure and CLOSE at a lower pressure.
Since we can't electrically change the dead band between OPEN and CLOSE, we
need another SPST switch to momentarily bypass the pneumatic one.
Hopefully, there's already been a relay added between that pneumatic switch
and the compressor's motor, so we can just use a low current push button
switch to control the relay. Otherwise, we'll need to add a high current
rated switch or a low current switch AND a high current relay, in parallel
with the pneumatic switch.
Activate the momentary switch for just long enough to get the ride height
to where it's wanted.
Admittedly that solution defeats the pressure safety provided by the
pneumatic switch, but being momentary, no one's likely keep it activated
for longer that a few seconds. For safety, a higher pressure cutoff switch
could be added, I guess.
Ken H.
On Wed, Jun 1, 2016 at 11:06 AM, Emery Stora wrote:
> Ken
> Have you designed a circuit to allow one to override the air bag pressure
> switch so as to allow it to start when it is above the cut off pressure but
> below the pressure needed to level the GMC?
>
> Right now I have to dump air to get the compressor to start and then pump
> the bag back up.
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] Water System [message #301400 is a reply to message #301394] |
Wed, 01 June 2016 20:22 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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Senior Member |
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Why not just get another switch with a smaller dead band. The one I installed years ago from McMaster had the and cut out and dead band (cut in) pressures both adjustable. The dead band on mine is somewhere between 5 and 10 PSI. I do not remember exactly where I set it.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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