water degradation

Submitted: Sunday, Apr 04, 2010 at 15:45
ThreadID: 77452 Views:2050 Replies:3 FollowUps:1
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hi everyone does any one know if water degenerates if left in a caravan underfloor black plastic tank and only occasionally topped up? it appears and tastes just fine. also what is the capacity of the average caravan tank? many thanks in anticipation thomas qld
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Reply By: Motherhen - Sunday, Apr 04, 2010 at 16:08

Sunday, Apr 04, 2010 at 16:08
Hi Thomas A

So long as it is in the dark so not algae can build up (and it is) it lasts for ever. We don't drain our tanks, even if the van has been left sitting for two years. Likewise our home water tanks which just get topped up with the rain. For those using water from underground sources (which is part of many city supplies) that has been sitting underground for tens of thousands of years. All good water.

Capacity? Depends what tank you have fitted. Ours have 80 litre; some tanks are 60, some 100, and probably many other sizes. I think our first caravan had around 20 litre tank.


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Reply By: Member - Allan B (QLD) - Sunday, Apr 04, 2010 at 16:15

Sunday, Apr 04, 2010 at 16:15
I agree that in a black poly tank the water will stay potable for a very long time but it may absorb some taint from the plastic. So to be sure, I drain and refill ours prior to each trip.


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Follow Up By: snailbait (Blue mntns) - Sunday, Apr 04, 2010 at 18:22

Sunday, Apr 04, 2010 at 18:22
I would always fill up with town water which has clourine int . this should keep it potable do not fill up with river water or rain water if you do drain it when your get home and refill with town water
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Reply By: Member - Andrew (QLD) - Sunday, Apr 04, 2010 at 19:19

Sunday, Apr 04, 2010 at 19:19
No worse than every rainwater tank on a house, possibly better as the residual chlorine introduced when filling from the tap may provide some help for a short period of time.

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