This is not a huge problem - just a bit annoying, and I've never noticed it before. I'm connected to campground water and the pressure is a little high. I'm using a pressure regulator at the spigot. That feeds a 25' 5/8" hose which connects to a water filter connected to my trailer. I'm snow-birding in Florida. The temp has been ranging from 50s at night to 70's in the day.Here's the problem - Every water fixture inside starts out with good pressure and flow. Then after 5 seconds or so it drops way low. Not so low it stops but low enough to be aggravating.If I remove the pressure regulator at the spigot, I get continuous great pressure and flow. No slowdown. But the pressure is really too high. I found a couple faucet connections dripping without the regulator in place.So, I went to CW and bought a high flow (50-55lb) regulator and installed it in the same place at the spigot. Good flow but the pressure drops off after say 15 seconds, whereas it dropped off at 5 seconds with my original regulator.My question is whether it's normal for regulators to drop pressure after 5-15 seconds? I've been rv'ing 10 years in 3 different units and never noticed this before.Is it maybe the pressure buildup in the 25' hose that gives good pressure for a few seconds? How may screens should be in a supply line? I have one in the regulator and one in the filter. All are clear.Sorry for the novel...

I have my regulator where water enter rv so no lose from hose.one screen in inlet to regulator.When I used a cheap regulator I left pump on and it would keep pressure up if it got to low.Worked for me ' dave

I don't think its the pressure regulator. I think its the hose. When setting still, the (static) pressure stretches out the hose. When you start water flowing, the hose slowly shrinks back to its resting state.Getting a stiffer hose will solve the problem.

If the regulator is on the spigot end, it is possible that it is the regulator. The larger diameter hose acts as an accumulator tank. Once the pressure drops the small hole in the regulator restricts the flow.I would opt for a better regulator like the Valterra A01-1117VP or a WattsValterra

Couple thoughts come to mind. First, as stated above, the hose is holding pressure, (as stated above)Second, nothing wrong with your pressure regulator.Third, is your filter clogged up?Fourth... I quit using water connected to the campground spigot. I attach my hose long enough to fill my fresh water tank on my camper, then run water from the fresh water tank. I run water into the tank via a filter also. Although I have never had problems with water pressure at any campground (because I have a pressure regulator also)... I quite doing this because of 2 events that happened.First: When we got our new Outback TT, we stopped at a KOA campground. When we check in, the manager told us to use the regulator because the water pressure through out the entire campground was above 70 PSI, and without a regulator, we'd blow our trailer pipes out! (Oh yuck).This got me to thinking???? Just how good is that little regulator. So right then I decided to go ahead and fill the fresh tank and not worry about pressure at all. After all, the on board pump is made to be at the right pressure! Right? So I filled the fresh water tank, unhooked the hose, and ran off the tank. I've been doing it that way ever since. This also prevents the problem of LOW pressure, which we did experiences a lot in our past.Second. This event happened a few years ago, but it taught me a lesson, to always keep fresh water in the tank. We were at a campground that had their own water supply, on their own well system. We were connected via the hose, happy camping, when sometime in the middle of the night, their pump house had major electrical problems and .... you guessed it ... no water to the entire campground. We were scheduled to be there several days. I will say that next morning, the entire campground (campers) were all in a panic. I did have about 1/3 fresh water tank full, although the water was not recently "fresh" it was enough we could take showers and such in the camper, which we did.Finally, they got the power problem worked out and the water going again. It took the entire day to get it fixed. I then drained the old water out of the fresh tank, and then refilled with fresh water.And you know what? Their pump house blew again that second night! Only this time, it took 3 days to get the water going! We were quite comfortable... we had plenty of water in the fresh tank, and we had a marvelous time! But... there were many people in the campground who packed up and left. Before the 3 days was over, there were only a very few of us left. So between these 2 events, I have always A) filled my fresh water tank when first arriving at a new campsite. B) would hook up the garden hose. But after the KOA incident, I just now fill up the tank and turn the campground spigot off! May I suggest you do the same and then you don't have to worry about pressure at all. (although you do have to hear the water pump run in your camper, but really, that's not so bad ... really!)

What kind of water regular are you using? One of those cheap in-line ones don't have very good volume. The pressure drop on 25' of hose is so small you have to scientific instruments to measure.

Water Pressure | Good Sam Community

N3YMY
Explorer
Jan 23, 2016
Chuck_thehammer wrote:
I just went thru this issue...

for me it was a NEW BLUE water filter. and removed it. all is good.

The small inline filters most RV folk use are only good to about 30 micron.

Want the flow and real filtration?

Build yourself a filter plant out of a pair of "big clear" or "big blue" filter tubs with a 1 micron sediment filter and an 15 micron GAC w/KDF.

Flow and acetone no more if camping in the SE US...
Cummins12V98
Explorer III
Jan 18, 2016
GoPackGo wrote:
Do yourself a favor and google 'rv water filter store'. This guy is the bible for rv filters and systems, pressure regulators and hoses. You will get educated on what is causing the pressure drop. Then buy an adjustable pressure regulator with a gage. I recommend a Watts 263A. I also run his filters and I bought a couple short hoses from him. Quality stuff.

Tim

I agree! I bought three different length hoses with brass ends and a Watts regulator from him. They will never wear out, nice and flexible in cold weather.
Chuck_thehammer
Explorer
Jan 18, 2016
I just went thru this issue...

for me it was a NEW BLUE water filter. and removed it. all is good.

except the Company will NOT reply to my e-mails.

2 weeks now.
wa8yxm
Explorer III
Jan 17, 2016
Not just the hose but the water heater.

By the way One trick I've used (in a park with well over 100 PSI) is to fill the fresh tank and use the on board pump, When the tank runs out I re-fill.

not the good thing about that is that this is a 2 week in one week out park and I do not use 80 gallons a week

So I fill before leaving and do not even hook up water on my week out.
naturist
Nomad
Jan 16, 2016
When I first started using a regulator, I put it on the trailer end of the hose. Then I camped at a campground where the pressure was so high it blew my hose. After than, the regulator went on the spigot end.

I like the idea of keeping the fresh water tank full even when you have a water hookup. I think I'm gonna start doing that. Once, years ago, before I had an RV, I was attending an event at a children's summer camp, and their well system blew up. It eventually required them to dig up a hundred feet of water main, and took 3 days to fix. Remembering how things got that week, I believe the full fresh tank idea is a winner. You know, just in case. Don't forget to empty and refill it frequently, though.
enblethen
Nomad
Jan 16, 2016
I would look on line for the regulator. Much less expensive. Of course going to an RV store is like going to a candy store!
allenm
Explorer
Jan 16, 2016
Forgot to mention - it was the hose causing the initial 15 seconds of high pressure. I've only had it a couple months. It really swells up. Must not be reinforced. Anyway, my new 15' braided hose doesn't do that.
allenm
Explorer
Jan 16, 2016
Thanks - lots of great feedback and ideas! I could kick myself for not getting an adjustable regulator with a gauge. Oh, well - sounds like a good excuse to visit the local RV supply house. My wife even understands the need for something that affects taking showers, etc. Some of my other purchases - not so much.

This snow-birding thing is new to me. I'm learning a person has to do things differently when staying hooked up in the same place for 4-5 months at a time. My neighbor was telling me it's best to keep the fresh water tank full and use it every now and then. Otherwise, bad things happen in the tank.

He leaves his pump on and lets it kick on when his pressure drops like when running the clothes washer.

So, I gave that a try. In my case I have to open 3 faucets for it to drop low enough for the pump to kick on.

In any case, Dutchmen Sports idea of running off his own tank has a lot of merit. It would be nice to setup a way to keep it filled automatically when doing months at a stretch in the same place. Or at least a crossover valve under the sink.
path1
Explorer
Jan 16, 2016
Make sure regulator is OK. I bought one once that said "max pressure 35 or whatever" it only was about 20 PSI. If you have a blow out plug and air compressor with a gauge, hook it up and see what "max pressure" really is with $10.00 water pressure gauge from lowes or ?
Old-Biscuit
Explorer III
Jan 16, 2016
Try removing that filter and see how the flow is.
IF same issue then try a different hose. (borrow a neighbors for test)

With no filter and a different hose......same issue then its the regulator

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