Shower water usage - Fiberglass RV



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Old 03-15-2019, 11:59 AM   #1
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Shower water usage

Can anyone tell me what the average gallons of water are used per shower?p
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Old 03-15-2019, 12:53 PM   #2
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how long is a string?


I use very little water. I fill the sink with hot water, then use a facecloth to give myself a spongebath, then a quick spray head to tow to rinse, and am done, I probably only use 2-3 gallons. I use minimal soap unless I'm really dirty/stinky.

my wife could fill the too-small grey water tank on our Casita 16 in a single shower.
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Old 03-15-2019, 01:53 PM   #3
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My string is longer than yours.
Let me answer this way.. I think the minimal to get clean in a shower (and not a sponge bath) is 2.5 to 3 gallons. I base that on the 2.5 gallon solar shower I use. If I am careful with it I can get pretty clean. What this means to me is don't plan on showering in the Scamp unless you have water spigot at your site.


Of course at home I'm sure I use 15-20 gallons maybe more. One web site says:

A standard showerhead uses 2.5 gallons a minute, or 25 gallons for 10 minutes.
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Old 03-15-2019, 03:01 PM   #4
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Originally Posted by gordon2 View Post
My string is longer than yours.
Let me answer this way.. I think the minimal to get clean in a shower (and not a sponge bath) is 2.5 to 3 gallons. I base that on the 2.5 gallon solar shower I use. If I am careful with it I can get pretty clean. What this means to me is don't plan on showering in the Scamp unless you have water spigot at your site.
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2.5 gallons for a quick, efficient shower. To determine this I measured the amount of grey water exhausted.
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Old 03-15-2019, 04:37 PM   #5
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A Navy shower does not take much.
Wet down, soap up, rinse
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Old 03-15-2019, 04:47 PM   #6
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Originally Posted by redbarron55 View Post
A Navy shower does not take much.
Wet down, soap up, rinse
For those not familiar with the term Navy Shower I would describe it as:
Wet down, water off, soap up, water on, rinse
Or at least that's how I do it.

But I was in the army....so I could be all wet....so to speak.

Though I think the Australian navy wet's up and soap's down...
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Old 03-15-2019, 05:14 PM   #7
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Speaking of being all wet.. a "Wet-Ones" shower, of course, requires NO water.

(But please.. stay down wind of me if you use this method)


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Old 03-15-2019, 08:25 PM   #8
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Just let your four-legged friends give you a tongue bath. No water used!
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Old 03-15-2019, 10:06 PM   #9
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then you smell like dog breath, oh joy!
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Old 03-16-2019, 08:18 AM   #10
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Yeah, it's a bit like asking how long propane lasts. It depends.

I also take navy showers in my camper, but it's still the #1 highest consumption of water. It uses up my fresh water fast and fills my grey water tank fast.

There are probably pretty accurate ways to test this, like buying a length of correctly sized water line with the right threaded attachment, hook up to the water pump, put the other end in a 5 gallon jug full of water. Take a shower in the camper and see how much you use.

Might sound like a lot of work but I don't think so. I have a short length of hose exactly like this in my camper already to suck antifreeze into the system without having to pour it in the fresh water tank. In fact it's probably long enough to do this test. I may do it sometime this summer...
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Old 03-16-2019, 08:50 AM   #11
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Another way to measure:
https://www.1000bulbs.com/product/11...rything%20Else

$15 isn't too gruesome although not as cheap as a 5 gallon bucket. Do we need to know within a 1/10th of a gallon? I think not.

I found one of these locally but I can't remember where. (Ace Hardware has one for $2 more.)

I have marked my freshwater tank in 5 gallon intervals, visible through the outside rear hatch door. (Poured in 5 gal, marked it, poured in 5 gal, marked it, etc.) I could pencil in a before and after shower measurement on the tank wall and ratio for an estimate.

Or, you could take a water meter measurement at home, take a shower, Navy or otherwise and repeat the measurement. I'd take the before measurement after I got warm water at the shower to cancel out the longer "warm up' time of house plumbing.

Or, Wiki estimates about 3 gallons for a Navy shower.

Interesting thought experiment...Lots of ways to go. Although nothing the OP couldn't have done for himself.
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Old 03-16-2019, 10:48 AM   #12
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Free method:
Level the camper and fill water heater. Put a piece of tape at the water level on your fresh water tank, shower, measure the distance from the tape to the new water level. Divide that measurement from the total height of the tank. Multiple the result by the capacity of the tank. That will get you pretty close.
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Old 03-16-2019, 11:14 AM   #13
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Estimating for a shower would be really hard for me to figure out. I know I can go 3 days comfortably without water or sewer hook ups and still take a shower each day. My hair is above shoulder length. I have a complete water shut off valve on the shower head (some will trickle water out; mine doesn't).


I also use the water to flush the toilet, wash my hands and wash dishes. I will wipe off most of what I can before washing them and I'm quite conservative in how much water I use for washing. I detest paper plates, so I don't go that route.


The 28 gallon grey tank in the Escape will fill up after 3 days. I can push it to 4 showers, but I definitely need to dump the tank afterwards.


I have used some of those waterless soap/shampoo items but much prefer to wash my hair. Now if you're bald, you'll use less water than I would.
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Old 03-16-2019, 02:51 PM   #14
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That water meter is the way to go!

I know other trailers are different, but my fresh water tank is very hard to access or even see.

I thought about testing in the home shower but the flow rate has got to be totally different from the camper water pump and shower head.

I run my shower into a water bottle until it gets warm, then shut it off. Water bottle gets poured back into the fresh water tank and the water doesn't get turned back on till I'm in the shower ready to go. This saves me about a quarter of a gallon per shower. Doesn't sound like much, but makes a huge difference in how long it takes to fill the grey tank.
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