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Old 01-05-2014, 06:25 PM   #1
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What is This::: Bypass Valve??

I'm trying to figure out what this is and what direction the water flows through it when it is in either position. The water heater is in the background. I'm trying to blow out the system for this cold weather we are having.
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1991 34' excella 1000, bought 05/10, oak floors, granite countertops, Marble bathroom counter and floor, 2 A/C's, 2005 Hensley.
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Old 01-05-2014, 06:38 PM   #2
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The handle lines up with the direction of flow. I would even go so far as to suggest that the printed arrow on the handle shows the actual direction of flow.
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Old 01-05-2014, 06:49 PM   #3
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Yup, that's a bypass valve in a 1991 Airstream...

I've never bothered to figure out how mine works, until now. When you figure it out, post some instructions. We are supposed to be 16 degrees tomorrow night with a high being below freezing!

Welcome to the warm, sunny south...
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Old 01-05-2014, 07:23 PM   #4
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Quote:
Originally Posted by HiHoAgRV View Post
Yup, that's a bypass valve in a 1991 Airstream...

I've never bothered to figure out how mine works, until now. When you figure it out, post some instructions. We are supposed to be 16 degrees tomorrow night with a high being below freezing!

Welcome to the warm, sunny south...


Vernon,

Sure hope y'all can warm things up a bit before we head down that way in mid Feb!

If we are able to stick with our plans, we should arrive in Vicksburg on
the evening of 16 Feb and stay for three nights.

Hoping to stay at the park near the Casino if you have chance to stop
by! 30' Classic with a black GMC crew cab and Ontario tags!

A haven't made any reservations, as I never know if weather might screw up our departure date. I figured it shouldn't be a problem having no reservations at that time of year.

Same thing for our following planned stop for a few days at Breaux Bridge La.

The only place I made reservations at was for a month in Tucson, so no matter what the weather, it could screw up our plans for the short stop at Vicksburg and maybe even the next stop in Louisiana, but one way or another we should be able to get to Tucson for the dates I have picked!

Brian.


(PS sorry to get of topic! Our bypass valves look totally different!)
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Old 01-05-2014, 08:27 PM   #5
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Drain the water heater and blow out the water lines. For additional freeze protection pump the pink anti freeze through the lines. Turn off the bypass valve 1st to prevent filling your water heater. Also drain the fresh water tank but no need to pump anti freeze into it.....or you will have pink water for a long while come camping time.

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Old 01-05-2014, 09:46 PM   #6
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Thanks FreshAir and Wingeezer...I was hoping to keep from running antifreeze in the lines so I could use it on weekends during the winter. Right now I run the furnace in it when the outside temp is more than 5F below freezing. Kinda a pain and uses propane needlessly. I wish I could train myself on how to drain the system and blow it out with air pressure. Maybe I'll rig up an connector for the city water outlet to the air hose adjust the air pressure <40psi and see if I can push air through it to the faucets.

There's no water in it right now so I can't test the direction of the valve, but if I remember right, when the lever is in the vertical position the water pump ran constantly and moving the lever horizontally allowed the pump to pressure up and cut off. I'll see if I can test it tomorrow.

Thanks for you help.
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Old 01-06-2014, 04:20 PM   #7
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This took hours to mess with. I think I'll just use the antifreeze and be done with it. Luckily it doesn't freeze hard here or I'd already be up a creek.

With the system pressured with air I noticed that when the lever was in the horizontal position should bypass the water heater. When the lever was vertical I heard bubbling in the water heater. The next time I put water in it I'll pay closer attention.

Anyway, I couln't get all the water out of the water lines. I did the raise/lower the tongue trick a couple of times and opened the drain valves (Inside closet near the front tire well) screwed out all the way and I'm not convinced that the system is evacuated enough to let nature take it's course. I unscrewed the P-traps on the kitchen and bathroom sinks and emptied those. The previous owner must not have done this because the one in the kitchen was cracked.

Thanks for everyones input..Happy travels
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1991 34' excella 1000, bought 05/10, oak floors, granite countertops, Marble bathroom counter and floor, 2 A/C's, 2005 Hensley.
Tow With: 2006 Dodge 2500 Quad Longbox 2WD, 5.9 Cummins, Edge Insight CTS, Smarty Jr programmer, Bilstein Shocks, Ingalls balljoints.
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Old 01-06-2014, 05:58 PM   #8
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A few points, all in the nature of general information for draining your trailer. Since I don't know the extent you your knowledge concerning winterization, please don't take offence if I cover something you already know.

There are a few valves (taps) which are used to be a part of the drainage process that need to be opened to allow the water to be completely drained. They are call the "low point drains", and merely serve to allow the pipes to empty themselves to the outside.

I hope you realize that a compressor needs to be used to blow the water out. Open only one tap at a time (galley sink, bath sink, tub) and allow the compressor to pump air through each line for 5 minutes or so, then close it and go on to do the next one. The trailer is best left in the level position, IMO. At the end, feel free to tilt it to try for more.

There is a small adapter available for a dollar or two that will go from a standard garden hose fitting to a Schrader valve, so that the air may be efficiently pumped through the TT's plumbing.

It's vitally important that you soldier on and get that water out of the copper plumbing. The P-traps only need pink stuff poured into them, same for the black and grey tanks.

There are many, many threads on draining the TT on here, I would find a few and read them thoroughly for your own benefit.
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Old 01-06-2014, 06:03 PM   #9
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When the snow makers get done making snow for the night on a ski hill, they hook up the air pressure to the water lines and blow them each out until the fog stops.
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Old 01-07-2014, 06:03 PM   #10
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Quote:
Originally Posted by Aage View Post
A few points, all in the nature of general information for draining your trailer. Since I don't know the extent you your knowledge concerning winterization, please don't take offence if I cover something you already know.

There are a few valves (taps) which are used to be a part of the drainage process that need to be opened to allow the water to be completely drained. They are call the "low point drains", and merely serve to allow the pipes to empty themselves to the outside.

I hope you realize that a compressor needs to be used to blow the water out. Open only one tap at a time (galley sink, bath sink, tub) and allow the compressor to pump air through each line for 5 minutes or so, then close it and go on to do the next one. The trailer is best left in the level position, IMO. At the end, feel free to tilt it to try for more.

There is a small adapter available for a dollar or two that will go from a standard garden hose fitting to a Schrader valve, so that the air may be efficiently pumped through the TT's plumbing.

It's vitally important that you soldier on and get that water out of the copper plumbing. The P-traps only need pink stuff poured into them, same for the black and grey tanks.

There are many, many threads on draining the TT on here, I would find a few and read them thoroughly for your own benefit.
Thanks, That's pretty much what I did. The pink stuff in the P-traps is a good idea and quick!!! I used my compressor and 50'hose to reach where the trailer is, then used a couple of reducers to get the 1/4" NPT air hose to attach to the 3/4" coupling on the 5/8 water hose. Overall, it didn't push alot of air volume through the TT pipes and I wan't impressed with it since I could still hear gurgling. My brother said that it would take a few days for the taste to rinse out of the pipes so he recommended just using the furnace to keep everything from freezing. His "77 Argosy froze the pipes once in his Saskatchewan winter and that was all it took to get him to use the antifreeze. He pumps in the antifreeze then uses air compressor to push it through and, the cheapskate he is, recovers what he can.
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1991 34' excella 1000, bought 05/10, oak floors, granite countertops, Marble bathroom counter and floor, 2 A/C's, 2005 Hensley.
Tow With: 2006 Dodge 2500 Quad Longbox 2WD, 5.9 Cummins, Edge Insight CTS, Smarty Jr programmer, Bilstein Shocks, Ingalls balljoints.
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Old 01-09-2014, 09:56 AM   #11
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If I know that I may be wanting our trailer in freeze times I run a portable electric heater set to about 40 degrees. Then open any cabinets where plumbing is routed through.

Neil
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Old 01-09-2014, 10:52 AM   #12
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I blow air through all my lines - even used it for the drip irrigation for my raised beds.

Usually, I pour the pink stuff in the drain lines to protect my traps. Just realized I forgot one - the worst one to forget - the bathtub.

I had planned on using my shop vac in reverse to blow water out of the traps as well. Anyone ever try that one?
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Old 01-30-2014, 06:42 AM   #13
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Aage is right with the handle direction on the bypass valve. With the handle horizontal the flow bypasses the water heater. When the handle is vertical the water heater fills and water flows through it.
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Tow With: 2006 Dodge 2500 Quad Longbox 2WD, 5.9 Cummins, Edge Insight CTS, Smarty Jr programmer, Bilstein Shocks, Ingalls balljoints.
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