I'm in the process of restoring a 1977 Midas 22' Motor home on a Chevy G30 Chassis and I could use any info on how things work like the plumbing.  I've restored antique cars and trucks before but this is my first RV.    I can't locate any owners manuals or anything but just learning the plumbing would be a great help.  Thanks!

Tags: Chevy1977, Midas

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Hi Matthew, I don't have a Midas but I do have a 1978 Travelcraft on a 77 G-30 chassis, I have a few chassis related pamphlets on the G30. As far as the coach goes you can search GORV's ;at the top of the page on the right side there is a small search bar. Most campers used common era appliance's and you may be able to peace together a decent amount of good information by breaking it down into components. Hope this helps you some.

Hi Rich, Thanks for the response.   This is my first RV and so just learning how to distinguish between the grey water, black water and fresh water tanks would be a help.    I'll see what I can dig up.

It looks like there is no separation between the grey and black water and it all goes into one tank.  Is that common on these smaller RV's?

My class C Tioga had a combo tank,, grey and black with single drain,,, Mine was a 1979 and it was common place to have a combo tank Take into concideration, they have to fit everything inbetween the frame and from frame to exterior sides and it wasnt feasable to have 2 tanks when one tank would serve the purpose.,,,

B.T.W.   Nice looking Class *C  rig you have...

An F.Y.I. when dealing with Plumbing,, especially if your replacing it,,  It travels down stream to the tank, using gravity,,, be sure all plumbing lines have a gradual slop downwards (excluding *P traps), and be sure the *vent tubes are not closed off or obstructed. When working with fresh water lines, its a good idea to install *anti drain back valves, and shut off valves to the sink (s), shower and toilet.(that way if you get a leak in anyone of these locations, you can shut the water supply off to the problem area and still have water to the rest of the fixtures.)... It may look complicated,, but its basic geometry and physics,, water flows down hill a heck of a lot easier then it does up hill.

So, please excuse my ignorance about these things but, what is all this in the picture.  I can guess that the pipe is where you hook up the drain tube but are the other two things pull handles to release the flow?  This is my first RV and I just don't know enough about this system yet.  


Be sure to hook up the sewage hose to the connector *behind that round cap,,, the hose connector has locking tabs as you turn it right to lock it into place, THEN pull the handle out to OPEN the drain valves,, and when the tanks are empty,, push the handles (valves) back in, and disconnect your hose.

So they just pull out?   Mine may be stuck due to years of not being opened.   Thanks for the info.   

Yes,,, they can become stuck, but with a little wiggle and jiggle is should pull out about 4 inches,,, if not,,, then its froze up,,, so applying some elbow grease and persistance you should get it freed up.

Thanks.  I'll work on that.  :)




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