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Old 04-30-2009, 06:40 PM   #1
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Is the water pressure regulator really necessary?

Howdy folks:

This may be a dumb question, but I gotta ask it:

Is the water pressure regulator really necessary on my 78 Sovereign?

I'm talking about the unit that goes inline for the external water source line imput. Not the tank, the hookup water source.

If I yank that piece and the back-flow prevention valve piece, it appears I will get free-flow into my plumbing. BUT....will I not really increase my risk of blowing a fitting under the trailer or something if I do this?

Does the water pressure really vary greatly around the country and in different external spigots?

My safe is to replace it and keep it working in the system, right?

I was afraid you were gonna say that. <grinning>

best regards,
page.crow
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Old 04-30-2009, 06:47 PM   #2
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Yes you do need a regulator. Water pressure can be all over the place. At my home it is 100+ PSI. You could get a regulator that screws onto your hose to replace the one in the trailer. That is how my trailer is setup.
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Old 04-30-2009, 07:07 PM   #3
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Water pressure varies greatly , even in the same campground depending on terrain . I have found that I also have needed an inline one to protect the hose at the spigot. As far as the backflow valve you will need that too . Without one you won't be able to use the water tank and pump , it will just flow out city connecter.
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Old 04-30-2009, 07:29 PM   #4
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Preferably a good adjustable one with a gauge, at the spigot,,,,,,,,,,"don't leave home without it".

It's really ugly to come back after a day of sightseeing and find water running out the bottom of your rig. Not that it ever happened to me you understand.
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Old 04-30-2009, 09:13 PM   #5
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I will add to the choirs. YES I blew a diapham in the lod style PAR pump used in your 77 when I had it installed in my 63 but forgot to hook up the regulator at the water source and ended up coming back to a soaked trailer. I could not find a replacement diapham in the area so I installed a Flowtec replacement. I now will always remember to install the regulator and turn off the source before I leave on a site seeing trip. My 77 has the regulator built into the back compartment but I will still use the portable regulator at the water source.
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Old 04-30-2009, 09:29 PM   #6
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Guess you know by now that "yes" it is the only way to be safe.

I used to have one with a gage and found water pressure from 118psi to 40psi.

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Old 04-30-2009, 11:32 PM   #7
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Really appreciate the forums. We've been wondering about the necessity of a water pressure regulator as well. Thanks to all - will get one ASAP.

Shar
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Old 05-01-2009, 03:01 AM   #8
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I have a inline pressure valve I purchased at walmart max pressure 50 psi just a back up in case the one I have which is 20 years old desides not to work. I also installed a inline back flow valve at the pump to .
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Old 05-01-2009, 08:13 AM   #9
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To all my Fellow trailer-sailors: Much thanks! OK! I concur. <grinning> Off to the hardware or plumbing supply stores and both pieces will be replaced. Let me re-cap this thread:

1. The pressure-regulator is necessary due to wide variation of pressures.
2. An in-line pressure regulator can be installed along the hose line. This type of pressure regulator can be purchased at WAL MART?
3. Without the back-flow one-way valve, the internal water pump will pump your tank water back out the hose fitting. (of course...)
4. The back-flow valve can be installed right next to the internal pump. (Thank you Mr. Crowley.)

I'm a newbie to Airstreams. When I bought this beast (31' Sovereign) I didn't know I was also buying into such a great group of like-minded folks. Naive me. <grinning>

Much obliged you all,

page crow
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Old 05-01-2009, 08:19 AM   #10
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You can replace the hose connection fitting with one that has the check valve built into it. That would take care of #3.

As stated earlier, the in line hose regulator should be placed at the water valve and not at the trailer end of the hose. This will keep the high pressure water out of the hose and prevent it from failing.
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Old 05-01-2009, 10:11 AM   #11
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I think you would want the check valve before the water pump to protect it from line pressure . Would that sound correct?
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Old 05-01-2009, 12:18 PM   #12
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There are typically 2 check valves in a trailer of this vintage; one keeps pump/tank water from going out the city hookup, and another one just before the pump, to keep city water from blowing into the pump and water tank. Some pumps have an internal check-valve, but some don't.

now, a question of my own: what does Airstream put in the current models for a regulator?
I have the big-old bulky one out of the trailer at the moment, but I don't want to rely on only the cheap 5$ walmart special forever. Wondering if maybe there is a lighter/smaller/easier to fit in a tight space type regulator that could be used instead. (not sure if the old one even works...or how it could be tested).
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Old 05-01-2009, 12:36 PM   #13
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YES! YES! YES!...You need a pressure regulator!!!

Just had a guy call yesterday saying he hooked his trailer up yesterday morning, turned on the water and went off to work...when he got home, you guessed it, his whole trailer was flooded! Water was pouring from his underbelly, water rushed out his door when he opened it. NO pressure regulator! It blew the line under his kitchen sink and ran all day until the park manager saw all the water coming out from under his trailer and turned off the water supply at about 3 that afternoon!

G
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Old 05-01-2009, 03:34 PM   #14
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Quote:
Originally Posted by page.crow View Post
To all my Fellow trailer-sailors: Much thanks! OK! I concur. <grinning> Off to the hardware or plumbing supply stores and both pieces will be replaced. Let me re-cap this thread:

1. The pressure-regulator is necessary due to wide variation of pressures.
2. An in-line pressure regulator can be installed along the hose line. This type of pressure regulator can be purchased at WAL MART?
3. Without the back-flow one-way valve, the internal water pump will pump your tank water back out the hose fitting. (of course...)
4. The back-flow valve can be installed right next to the internal pump. (Thank you Mr. Crowley.)

I'm a newbie to Airstreams. When I bought this beast (31' Sovereign) I didn't know I was also buying into such a great group of like-minded folks. Naive me. <grinning>

Much obliged you all,

page crow
"Bound to cover just a little more ground..."
I question #4 . The back-flow valve has to be after the pressure regulator at the city supply end and before the first tap for water in the trailer , otherwise something will not be fed . A second one can be used at the pump to prevent overfilling the tank if it's not built into the pump . Personally , I use a manual valve at the pump .
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