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Old 05-11-2012, 11:03 PM   #1
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1964 17' Bambi II
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Is this water pressure regulator OK?

My DH is the official plumber of our project. I'm the parts lady. Can we just use this water pressure regulator if we ever go to a full hook up park:

Rv Motorhome Hose Inlets Water Pressure Regulator Pre-Set 45 lbs. PSI Box | eBay

or do we have to put one of these inside the trailer:

Adjustable Water Regulator W/Gauge, Lead-Free

Does it really matter?
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Old 05-11-2012, 11:57 PM   #2
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Most, but not all parks have water pressure which will not hurt your AS even without a pressure regulator. AS is one of the few companies which put them in their trailers as standard equipment. I know there are folks out there who will violently disagree with me, but I don't think they are necessary to begin with. If you are worried, buy a little pressure gauge and measure the pressure in a park prior to hookup. If it is above about 60 psi, simply continue to use your tank water and pump, and refill the tank as needed.

Either of the external regulators you show in your post will work, the one from vintage is probably better overall.

Remember, my opinion only, and what I would do.
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Old 05-12-2012, 01:07 AM   #3
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RV park water pressure can vary dramatically and one time testing may not be an accurate predictor of say, night time pressure when there is little use. The device you are looking at is cheap insurance and worth it if it only gives you peace of mind. Even if your coach has a PRV built in, is it functioning? You should also think about backflow protection from either an airgap or a double check valve.
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Old 05-12-2012, 05:20 AM   #4
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We use both. The one built in the trailer, plus an external one . The external one will help protect your hoses. On a hot, sunny day, with above average water pressure, a hose can swell & burst. Or at the least it will stretch in diameter , causing it to leak at the fittings, and then never wants to roll up again without a fight. Marshall Brass has been around a long time and makes a good one. $ well spent.
John
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Old 05-12-2012, 06:43 AM   #5
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I'd go with the regulator for the hose. Put it on the campground spigot, and be done with it. There are some RV parts places that sell regulators like that for about $10, so I'd probably keep shopping for a different one than the Ebay linked one.
And a regulator is a good idea. The last rally we went to, I forgot our regulator, and, even though the pressure wasn't all that high, it was enough to present us with a chronic leak over the course of the entire rally. I got to know the people at the local Home Depot better than I wanted to.
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Old 05-12-2012, 08:12 AM   #6
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I bought mine at Gemplers. It is pricey, but is adjustable with a built in gauge. I've seen pressures as high as 90 psi at campgrounds.
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Old 05-12-2012, 08:25 AM   #7
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Quote:
Originally Posted by TG Twinkie View Post
I've seen pressures as high as 90 psi at campgrounds.
So have I, just before the hose came apart. It was--interesting.
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Old 05-12-2012, 05:17 PM   #8
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Like sandlapper, we use a brass regulator similar to that pictured despite the fact that there is one built into the rig... it's cheap insurance.
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Old 05-12-2012, 06:42 PM   #9
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A local fish and game state park with some hook ups we go to a lot must have 120 psi water pressure.. We had our SOB 5th wheel hooked up and the first warning was when our water hose outside blew..

Went to the local town and got another one that held.. The next day water was leaking from 4 places under the trailer.. It had crimp type hose connections and the pressure was so great it stretched them.. Got the leaks all stopped and spent the money to get a screw on pressure controller..

Cheap,. . insurance!

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Old 05-12-2012, 06:46 PM   #10
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I used the adjustable one on our 63 Safari.

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Old 05-12-2012, 07:08 PM   #11
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I got my hose attached regulator from Amazon. I think it was about $7. I put it in front of the water filter and attach directly to the park water supply outlet. I suppose it works as nothing has blown out, yet.
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Old 05-12-2012, 07:35 PM   #12
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So I can just use an exterior regulator and skip installing one inside through the plumbing? I have one like the first one on hand, but if I need one inside plumbed in, I'll have to order one kind of like the H560 on this page I think:
RV Water Filter Store: Standard Filter Canisters for Whole RV

I'm assuming you all have them inside your trailers & you use the exterior one as an extra measure. Am I assuming right?
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Old 05-12-2012, 08:10 PM   #13
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The built in regulator is part of the city water connector on which you connect the hose. It is on the inside of the fixture (at least on our '93). They are notorious to leak but easy to replace. The leaking culprit is an "o" ring inside the fixture. It can actually be separated and the "o" ring replaced. Someone can probably come up with a picture of it for you.

John

I use the extra one at the spigot for extra protection on the hoses. It could also take the place of a built in one.
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Old 05-13-2012, 05:26 AM   #14
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Quote:
Originally Posted by beckybillrae View Post
So I can just use an exterior regulator and skip installing one inside through the plumbing?

I'm assuming you all have them inside your trailers & you use the exterior one as an extra measure. Am I assuming right?[/QUOTE

Yes, I've been using the add-on ever since we got the Classic.


I use the extra one at the spigot for extra protection on the hoses. It could also take the place of a built in one.
Better safe than sorry.

Bob
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