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Old 04-11-2013, 05:21 PM   #1
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Question Fresh water hose diameter

This probably isn't the right forum for this question but I figured someone here would know the answer.

Fresh water hoses are available in either 1/2" or 5/8" diameter. Does one have an advantage over the other for RV use?
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Old 04-11-2013, 05:27 PM   #2
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Hmmmm, I think mine are 1/2". So is the internal plumbing in the AS, so I don't think a 5/8" would gain you anything.
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Old 04-11-2013, 05:42 PM   #3
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I went with 1/2 inch. Lighter, packs smaller and doesn't affect water pressure. I bought this one on amazon. It doesn't kink and I like the green, blends in and doesn't look as messy when everything is hooked up.

Amazon.com: Water Right PSH-025-MG-6PKRS 25-Foot x 1/2-Inch Polyurethane Lead Safe Ultra Light Slim Garden Hose - Olive Green: Patio, Lawn & Garden
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Old 04-11-2013, 06:36 PM   #4
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The 1/2" does make sense. Thanks to both of you for your input.
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Old 04-11-2013, 07:40 PM   #5
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I don't think size makes much difference as the does being the no-taste white hose for drinking water.
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Old 04-11-2013, 08:18 PM   #6
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Size makes all the difference. Opps. No pun intended. If you group camp and chain more than 2 rigs together off one water source, 5/8 is needed to keep pressure up for everyone. Good example is the Hobo Rally in California. Water source is at the front of the line. 10 or more rigs hook up in a chain for water and electric. Also a couple high flow y connectors are good to have with the tool box in the rig. Depends on the camping style.
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Old 04-11-2013, 10:11 PM   #7
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On 25' or shorter hoses, 1/2" would work. But as the length of hose increases, so does the internal resistance to the flow of water. A larger diameter allows a larger stream of water to flow away from the inner "friction skin" of the hose.
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Old 04-11-2013, 10:31 PM   #8
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I have both sizes of hose. I can not tell any differance once either one is hooked up. So my opinion is it does not matter which size is used.
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Old 04-11-2013, 10:38 PM   #9
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I have a short 5/8" and a longer 1/2".

In some cases the 5/8" hose will fill the freshwater tank somewhat more quickly, if there is enough flow available at the source.

I notice no difference when using them to connect the city water inlet.
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Old 04-12-2013, 05:23 AM   #10
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Quote:
Originally Posted by AlumFalcon View Post
I bought this one on amazon. It doesn't kink and I like the green, blends in and doesn't look as messy when everything is hooked up.

Amazon.com: Water Right PSH-025-MG-6PKRS 25-Foot x 1/2-Inch Polyurethane Lead Safe Ultra Light Slim Garden Hose - Olive Green: Patio, Lawn & Garden
Don't use green water hose for freshwater service. It may be "lead safe" but it will still leach volatile hydrocarbon compounds from the plastic into the water over time.

White water hose with a blue stripe is colored that way for a reason. That color combination was actually chosen by the American Bureau of Shipping for potable water hoses aboard ships, and is a way to quickly identify that the hose is made from a "food grade" plastic compound that has been tested by ANSI (American National Standards Institute) as being safe to come into contact with food and water meant for human consumption. Green plastic hose, even if it's marketed as "lead safe" is not "food grade" plastic.

So, ditch your green plastic hose, and get a white hose with a blue stripe. And caps for the ends for when you store it; it's only going to stay good for potable water use as long as you never get any dirt inside of it.
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Old 04-12-2013, 07:04 AM   #11
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What Protagonist said. White only for potable water. I screw the ends of the hose together to keep clean, but do cap the other components of my water system. I also hook up these hoses and components to the outlet spigot on the AS when draining the highly chlorinated water from the fresh tank when doing my spring sanitizing.
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Old 04-12-2013, 11:09 AM   #12
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Green plastic hose, even if it's marketed as "lead safe" is not "food grade" plastic.
Thank you, this is good info but I check on their site before buying. This is what they say:

Polyurethane 100% lead free, contains no phthalates, drinking water safe
Made from FDA & NSF Grade Polyurethane
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Old 04-12-2013, 11:14 AM   #13
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Originally Posted by AlumFalcon View Post
Thank you, this is good info but I check on their site before buying. This is what they say:

Polyurethane 100% lead free, contains no phthalates, drinking water safe
Made from FDA & NSF Grade Polyurethane
Hmmm, strange they wouldn't make it white then. First one I've ever seen for drinking water that isn't.
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Old 04-12-2013, 11:43 AM   #14
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Green Hose

I also have a green hose that is made for drinking water use (not the same one listed above). It is a heavier duty and higher quality hose than the white ones with blue stripe. The inside is actually white plastic. Been using it for many years.

Maybe it's a Washington State thing... We like our green!!
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