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Old 06-11-2021, 05:04 PM   #1
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What is the difference?

What is the difference between fresh water and city water hookup?
Those are two water connections on a fill station on a trailer. That was posted on this forum.
For some reason I can't post the picture!..
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Old 06-11-2021, 05:31 PM   #2
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Can only guess fresh water goes straight to the tank, city water feeds taps, w/heater.
Most MH's have one inlet and a valve to switch which path the water flows.
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Old 06-11-2021, 06:20 PM   #3
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Some trailers will have two inlets in a compartment. One is for the drinking hose to screw into and probably could be referred to as the "city water inlet" as it's coming from a fresh water hydrant or spigot on the other end of the hose. It may have a washer/screen and could have a check valve built into it. It also could have a snap-on tethered plastic cap. It's the one on the right in the illustration below.

The other might be labeled "fresh water inlet" or something similar and usually will have a screw-on cap and could be a bit wider. It is typically called a gravity fill. It will not have a threaded female outlet for a hose to screw into. It is to fill the fresh water tank. A hose could be used to temporarily be inserted into the inlet but also other sources of potable water could be poured into that inlet to fill the tank. It's the one on the left in the image.

Below is how such a compartment might look. Does yours look similar?








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Old 06-11-2021, 06:31 PM   #4
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"City water" if for an external source of water that is under pressure i.e. no pump is required to get water to flow through the lines.

"Fresh water" would be the label on the connection for adding water to the fresh water tank of the RV. And on some RVs, there can be one hose connection with a lever for selecting to fill the fresh water tank or use it as a city water connection.

Water from the fresh water tank requires a pump to be able to get the water to flow through the water lines.
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Old 06-12-2021, 07:57 PM   #5
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Here is a picture.

I finally found a way to upload a picture of what my question is about.
As you can see the ports are clearly labeled.
I have owned 3 Class A,s and numerous trailers but have never seen labeling like in this picture.
What is the difference between FRESH WATER and CITY WATER?
It might be just me being hung up on terminology.
Does fresh water mean TANK FILL?
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Old 06-12-2021, 11:52 PM   #6
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I don't see a City Water/Tank valve in your photo, so I'm guessing when you connect to City Water, you can't fill your tank. You have to disconnect the hose, connect it to the fresh water and fill the tank.
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Old 06-13-2021, 05:48 AM   #7
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I would agree that fresh water would be your connection for filling the tank. Easy enough to check....make sure your tank isn't full. Hook up a hose and monitor the tank level gauge.

Also, know where your drain valves are located for draining the fresh water tank.
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Old 06-13-2021, 08:03 AM   #8
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If you notice the warning that is located immediately above the "Fresh water" label it states that you should flush & sanitize before using. To me that makes it pretty clear that it is there to fill the tank which they suggest sanitizing. If in doubt, connect a hose and see if the tank fills.
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Old 06-13-2021, 08:51 AM   #9
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Quote:
Originally Posted by scbwr View Post
I would agree that fresh water would be your connection for filling the tank. Easy enough to check....make sure your tank isn't full. Hook up a hose and monitor the tank level gauge.

Also, know where your drain valves are located for draining the fresh water tank.
This is not my unit!
It is a picture I took off this site.
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Old 06-15-2021, 10:41 AM   #10
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Yep.

Quote:
Originally Posted by Ted Lambert View Post
I finally found a way to upload a picture of what my question is about.
As you can see the ports are clearly labeled.
I have owned 3 Class A,s and numerous trailers but have never seen labeling like in this picture.
What is the difference between FRESH WATER and CITY WATER?
It might be just me being hung up on terminology.
Does fresh water mean TANK FILL?
City water connection = water pressurized from the site (city, town, RV park/campground, house) spigot and not stored in RV.

Freshwater connection = stored onboard the RV in the Freshwater Tank. It can then be pressurized by turning on the RV water pump. That will get the 'stored freshwater' to the RV faucets, showerhead(s), and toilet(s).

Fresh Water goes directly to a tank while City Water goes directly to an RV faucet, showerhead, or toilet.
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