Water Tank - Baffles Or Not? (1 Viewer)

HKF

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Jul 18, 2021
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The Charente, France
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Hi. Can someone tell me how I know if I have baffles in my fresh water tank, please? Thank you so much :)
 
Apr 3, 2018
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Just double-checked and it's 130L, so I was close enough. So, I shouldn't really travel with much in the tank, then?
Or snap it full... no room for movement then.
Personally, and this is only my view I would not be concerned with that amount of water sloshing about even without baffles.

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Last edited:
Feb 14, 2021
1,023
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Milton Keynes, UK
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79,219
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Burstner Lyseo 727G
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1 year 8000 miles UK, France, Spain. Campsites and off Grid.
I have a 120 litre tank. I travel with it full as much as I can (you never know when you will find water next when travelling off grid) sometimes it's 50% full or less. Never really thought about it being an issue and never noticed it to be a problem.
 
Jul 5, 2013
10,596
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Tunbridge Wells
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A class
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Since 2013
We have a 120 litre tank with no baffles in our Hymer. Always full when we leave home and when touring we take every opportunity to keep it that way. Never had any problems in the 40,000 miles we have travelled in the last 7 years.
 
Jul 15, 2020
3,130
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Hartford Cheshire
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73,061
MH
Bailey Autograph 79-
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Lots but slow learner.
With the Bailey Autograph you can access the tank from indoors. Screw top of about 5", put your hand in to search for fishes, or baffles. Not found either as yet.

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Jan 28, 2008
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walthamstow east london
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renault burstner delphin
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7 years campers before that
seats fitted under the dinette bench seats are normally shaped to fit round the frame so the are baffled by virtue of the shape, under slung square tanks sometimes have a baffle fitted i had a tank made for my self build deliberately without a baffle so i could fit the connectors when i knew where i needed them and the manufacturer recommended a slightly thicker plastic to allow for surge
 
Nov 3, 2013
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Portugal
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Fiat Ducato Auto Wildax
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C/van since '73 .M/h.2009
Hi.
No Baffles ? Not a problem. Baffles could/may/might/might not (y) ..... cause problems when cleaning tank out . I try to not let the level drop below 50% when on the move. 100ltr. tank.
Tea Bag.

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Sep 7, 2010
594
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cardiff
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Frankia 7900 Platin plus
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since 2010
We have a 120 litre tank with no baffles in our Hymer. Always full when we leave home and when touring we take every opportunity to keep it that way. Never had any problems in the 40,000 miles we have travelled in the last 7 years.
Same. 150l. Usually travel full. No issue in 60k miles over 8 years. Can occasionally hear slosh but never affected handling.
No convinced consumption would change but can feel weight when braking. Can be reassuring in high winds that you have 150Kg balast low down.
 

Jim

Ringleader
Jul 19, 2007
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Since 1988
We had a 60 gallon tank in an RV with no bafflles. I fitted a tap so when we were wild camping I could block the overflow and fill it to the max. It was a square tank, but when over filled it, it looked fit to burst, almost completely round! Never had an issue with it, never felt it move even when half full, but it was a big van.

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OP
HKF

HKF

LIFE MEMBER
Jul 18, 2021
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Same. 150l. Usually travel full. No issue in 60k miles over 8 years. Can occasionally hear slosh but never affected handling.
No convinced consumption would change but can feel weight when braking. Can be reassuring in high winds that you have 150Kg balast low down.

It's not the fuel consumption I'm worried about. After Jim's thread about fresh water, my thoughts are with the strength of my tank and whether or not it has baffles to help prevent sloshing against a thinner tank.
 

Jim

Ringleader
Jul 19, 2007
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I’ve never thought it was a real issue. But with manufacturers advising against. Who am I to argue. To tell people to ignore the makers advice, could prove costly.

But for me a maker who advises travelling with 20L either has no idea about motorhome use at all, or is a bad designer. Do makers have focus groups, if they do they must be either caravanners or accountants.

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Jim

Ringleader
Jul 19, 2007
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r, my thoughts are with the strength of my tank and whether or not it has baffles to help prevent sloshing against a thinner tank.

Don’t worry too much. You could start a poll Have you ever had a water tank fail In normal use. Yes or No. I’d bet the yes column would be empty or as good as.
 

DuxDeluxe

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Jul 10, 2008
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I’ve never thought it was a real issue. But with manufacturers advising against. Who am I to argue. To tell people to ignore the makers advice, could prove costly.

But for me a maker who advises travelling with 20L either has no idea about motorhome use at all, or is a bad designer. Do makers have focus groups, if they do they must be either caravanners or accountants.
Or desperate to save travelling weight due to a lack of payload. And yes, you do wonder how many have actually toured in a motorhome……..
 
Sep 3, 2012
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C Class Elddis 175
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Just double-checked and it's 130L, so I was close enough. So, I shouldn't really travel with much in the tank, then?
Most tanks are just plastic boxes with some shaped to fit the recess where they are but have never heard of any with baffles in.
We have a 120l tank under the bandwidth no baffles , but if your concerned that the water sloshes about then dont worry about it ,unless that is you are short on payload. A full tank of 130litres weighs 130kg
 
Jan 8, 2013
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Burstner Lyseo 690G
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Happy FLT since 2011
With my 3.5 tonnes max van. I can only travel with a quarter tank so not much water to swish about. We are always off grid and have never failed to find water when we want some, in fact it's getting easier every year. We only half fill it on bath night and drain the grey tank ASAP.

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Apr 3, 2018
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With my 3.5 tonnes max van. I can only travel with a quarter tank so not much water to swish about. We are always off grid and have never failed to find water when we want some, in fact it's getting easier every year. We only half fill it on bath night and drain the grey tank ASAP.
Appreciate you travel quarter tank for weight issues but in regards to possible handling issues (not that there will be any) but a quarter tank full tank is worse than a full tank.. more water... less spare room in tank therefore water cannot swish about as much as the water in your tank will...
 
Jan 8, 2013
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Dronfield - Derbyshire
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Burstner Lyseo 690G
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Appreciate you travel quarter tank for weight issues but in regards to possible handling issues (not that there will be any) but a quarter tank full tank is worse than a full tank.. more water... less spare room in tank therefore water cannot swish about as much as the water in your tank will...
Burstner have strict instructions to not travel with full tanks. They have special valve that only allows you to travel half full. I assume they have carried out tests as to the consequence and effect of half empty tanks.
I've never noticed any problems.
 
Apr 3, 2018
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Burstner have strict instructions to not travel with full tanks. They have special valve that only allows you to travel half full. I assume they have carried out tests as to the consequence and effect of half empty tanks.
I've never noticed any problems.
Is that a stability or a weight issue??

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OP
HKF

HKF

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Don't worry about it. What do you propose to do if it hasn't got baffles and you'd 'like' some?

I don't understand your point. I'm trying to determine whether or not I have a suitable tank to cope with water sloshing around in it. If it's not suitable, I can mitigate any issues by not carrying water in it (or carrying very little).
 
OP
HKF

HKF

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Jul 18, 2021
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With the world as it with wars, pandemics, warming, economic inflation, cost of living rises and City's failure to sign a left back, one of the last things I would worry about would be water sloshing about in my motorhome tank.

JJ :cool:

Good for you!
 
OP
HKF

HKF

LIFE MEMBER
Jul 18, 2021
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Most tanks are just plastic boxes with some shaped to fit the recess where they are but have never heard of any with baffles in.
We have a 120l tank under the bandwidth no baffles , but if your concerned that the water sloshes about then dont worry about it ,unless that is you are short on payload. A full tank of 130litres weighs 130kg

Thank you. I was wondering, after reading Jim's article, that we may have a thinner tank with no baffles, fitted so the manufacturer could boast better payload. In that case, it might not have been wise to travel with it full, in case it was damaged. I'm trying to mitigate any worry when we travel, after having two awful breakdowns in France already (albeit in our truck, not the MoHo) and another breakdown in the MoHo (when the fuel filter failed). I'm trying to stop any worries so that i can try to enjoy the MoHo before I completely lose my nerve and sell it. Thank you for your nice reply. Some people seem to think it's fun being blase and gung-ho about the whole thing, and berating me for having a genuine concern. One of them is fast on their way to my Ignore List :)

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