| Water Drain Cock Locations [message #190146] |
Tue, 13 November 2012 11:31  |
A Hamilto
Messages: 4508
Registered: April 2011
Karma: 39
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Senior Member |
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It is probably going to get cold enough in the next month that I need to winterize the Sequoia.
The Maintenance Manual shows the plumbing and water heater drain cocks on the side of the vehicle. There are no access panels outside the vehicle where the drain cocks appear to be on the drawing.
Are the drain cocks underneath or inside?
The stack of blocks I have under the rear are a couple inches short of level (the GMC squats a little). Will that prevent the plumbing from draining completely?
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| Re: [GMCnet] Water Drain Cock Locations [message #190151 is a reply to message #190150] |
Tue, 13 November 2012 11:40  |
Sean
Messages: 189
Registered: March 2012
Karma: 0
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Senior Member |
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On Tue, Nov 13, 2012 at 10:35 AM, Sean F <wsfulmer@gmail.com> wrote:
> On Tue, Nov 13, 2012 at 10:31 AM, A. <markbb1@netzero.com> wrote:
>> Are the drain cocks underneath or inside?
>
> On my 73 Painted Desert, the drain cocks are inside, in the back of
> the cabinet below the galley sink.
Pic: http://www.gmcmhphotos.com/photos/misc/p46439-drain-cocks-below-gall.html
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Sean
1973 260 Painted Desert
Luna County, NM
Gallery: http://goo.gl/Gfcpd
GMCMH Search Engine: http://goo.gl/xd8PK
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Sean
1973 260 Painted Desert
Luna County, NM
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| Re: Water Drain Cock Locations [message #190152 is a reply to message #190146] |
Tue, 13 November 2012 11:49 |
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Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
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Senior Member |
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| ahamilto wrote on Tue, 13 November 2012 12:31 |
It is probably going to get cold enough in the next month that I need to winterize the Sequoia.
The Maintenance Manual shows the plumbing and water heater drain cocks on the side of the vehicle. There are no access panels outside the vehicle where the drain cocks appear to be on the drawing.
Are the drain cocks underneath or inside?
The stack of blocks I have under the rear are a couple inches short of level (the GMC squats a little). Will that prevent the plumbing from draining completely?
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Aham,
My coach has five drains...
Hot and cold water just forward of the stove behind the drawers. There may be a retrofit as they are flare and the rest of the system is soldered copper. (2)
The Water heater drain - lots of fun to get at under the sink in the head. (1)
There is one more in line for the pot flush water in that back corner of the head. It is in a fitting flared into the Cu line. (1)
Last is the potable tank drain back in the potable pump hidy hole.(1)
If I were to open all those drains, I would certain that freezing WOULD DO DAMAGE.
There are loops under the sink in the head (that I already had to replace) and others under the galley. I blow the system clear with air. Be very sure that you clear the flush water valve in the bottom of the toilet. This is a problem that Thetford knew about 40 years ago, but they couldn't come up with a freeze tolerant valve. The replacement valve cost over 40$us.
Don't forget to blow out the shower plumbing even if you never used it. Water can accumulate in the copper going up to the wall fitting.
I asked Atwood, and the guy I spoke to said that the amount of water remaining in the heater tank because it is below the drain will not damage the tank.
If you don't have air and have to pump red-pop through the system, be sure to remember to push open the check valve in the city water connection or else you will have that leg up and over that is still plain water.
Matt
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
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