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Old 09-20-2010, 01:46 AM   #1
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1972 27' Overlander
Vancouver , Washington
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Exclamation Help? Our diagrams don't match!

Hi!
I've got a '72 Overlander (27' International) and when I bought him all of his plumbing in the galley was exposed. We are trying to replace all of the piping with new fittings, but nothing seems to be matching the diagram, and the service manual doesn't seem to be helping much.

There are multiple inlets (or openings anyway) on the fresh water tank, that we can't figure out. We also can't figure out all of the valves under there. (There are two? Hot and cold?) Also, where does the gray sink water drain to? Are there two tanks or three? All we can see is two from the looks of it, does the gray water drain into the same tank as the toilet?

Thanks so much for your help! We are very new to all of this!
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Old 09-20-2010, 02:12 AM   #2
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Hi welcome to the forums
Well lets see,
Multiple inlets- 1) fresh water fill larger in size than rest connects to fill port in side of trailer shell.
2) 2 small fittings are vent lines teed together and connected to the vent port on fill port on shell
3) Drain line medium sized opening connected to one of those two valves valves under there.
The two valves you see under there are for draining the fresh water system. One drains the water tank and the other drains all the water lines in the trailer.
Your 72 does not have a grey water tank. Water from the sinks and shower will go straight to the waste outlet, it does not drain into the black tank for the toilet.
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Old 09-20-2010, 04:15 AM   #3
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Look a little closer - you should have three valves. One each to drain the hot and cold lines and one tucked down in the floor - it drains the fresh water tank.
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Old 09-20-2010, 07:57 AM   #4
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Gary my 73 only has 2 valves one for the tank drain and one for the lines. the hot just back feeds throught the cold once all taps are open. Either mine or yours has been changed.
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Old 09-20-2010, 08:45 AM   #5
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Quote:
Originally Posted by wasagachris View Post
Gary my 73 only has 2 valves one for the tank drain and one for the lines. the hot just back feeds throught the cold once all taps are open. Either mine or yours has been changed.
Mine has three - the 72 manual seems to show show three. But, if you think about it, one for both with a cross tap into the hot/cold lines makes sense - and one less valve to go bad....
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Old 09-20-2010, 03:30 PM   #6
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1972 27' Overlander
Vancouver , Washington
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Thanks for your help!
So if there is no gray water tank, does that mean that if I'm boondocking that my gray water from sinks/shower is going to just flow out the drain? I'm not super concerned about it, as I only use biodegradable soaps, and don't use any kind of chemicals even for cleaning (vinegar does a great job!) I am just curious.

Also, has anyone put one of those instant hot water heaters in their coach? I really like the idea of it, and it seems more updated than the old one that is in there now.
If I were to put one in, I'd put it underneath the galley, or underneath the bed an eliminate running pipe any further than is neccessary.

Is a pressure regulator absolutely neccessary? Mine seems to be missing and I'm not sure the pro's/cons of replacing it.

Thanks again guys! I love the forums already!
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Old 04-10-2011, 08:45 PM   #7
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Lol

Quote:
Originally Posted by wasagachris View Post
Gary my 73 only has 2 valves one for the tank drain and one for the lines. the hot just back feeds throught the cold once all taps are open. Either mine or yours has been changed.
mine is the same i have 2 valves and ones for the main and ones for the tank. Hot drains back into main when valves are open.
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