Water heater

snorkellers replied on 18/01/2016 19:58

Posted on 18/01/2016 19:58

Been caravanning 2 years now and in the season try to get away every other weekend. In the past I have always drained down the hot water tank and have to fill and bleed it every trip. My question is, is it OK to leave the water in the tank for any length of time. This water is just used for washing and washing up, using a fresh bottle for tea etc

Runrig replied on 26/01/2016 22:24

Posted on 26/01/2016 22:24

Thanks for your answers. I was more concerned about legionaires than the extra weight.

legionelle only multiples to a level of concern in recirculating or standing warm water, and then is only a problem in high concentrations, atomised in air, then inhaled. Usual culptit is commercial air conditioning cooling towers. Showers are often cited as potential atomisers but cases are rare and often unproven.

Don't worry about legionaire disease.

But sterilise your system periodically to get rid of all bugs.

Just drain down anyway, for all the other good reasons mentioned above

MrGarval replied on 22/03/2016 21:42

Posted on 22/03/2016 21:42

I personally always drain down and cannot see any reason why not too as it is so simple. I only see benefits but I guess it is personal choice.

young thomas replied on 23/03/2016 07:47

Posted on 23/03/2016 07:47

swings and roundabouts, possibly depending on MH/caravan or frequency of use.

as a caravanner wont/cant carry a full aquaroll back with them, they will leave thier 'water tank' behind, emtying prior to departure, leaving only the 10 ltr in the boiler and pipework to drain.....some do this on the pitch.....

motorhomes have permanent large fresh water tanks and unless these are run down towards the end of the trip, there may tens of litres of fresh unused....

now, of your next trip is immimenet (as usually for us) its a waste of water to drain it on the drive (and the boiler) and then fill again.....

if we were having a break, or there was a risk of heavy sustained frost then i might drain down....

we will be leaving site this morning but will only drain the waste tank and then go......

Cornersteady replied on 23/03/2016 08:42

Posted on 23/03/2016 08:42

I was always 'taught' to drain down the boiler/heater as it could affect nose weight and my heater is right at the front though. Also any frost damage is not covered by the warranty.

young thomas replied on 23/03/2016 08:57

Posted on 23/03/2016 08:57

obviously, we dont have the same weight issues as a caravan might have, but youre right about the warranty issues on boilers..

we had a leak a few years ago while in Spain. we managed to work around it but when we got back, it was sent to Truma and we were told that, if it were foind to be frost damage, we would not be covered...

well, we had left for Spain, via France in September and hadnt seen frost for months....

the inspection revealed fault in the internal welding and the unit was replaced without question.....

SteveL replied on 23/03/2016 08:58

Posted on 23/03/2016 08:58

If you have an Alde system it tells you in the manual it should be drained once a month in any event, in order to re-establish the protective air cushion. So draining down between sites fulfills this. However, we would do this anyway, it is what we were taught.

Cornersteady replied on 23/03/2016 09:09

Posted on 23/03/2016 09:09

obviously, we dont have the same weight issues as a caravan might have, but youre right about the warranty issues on boilers..

we had a leak a few years ago while in Spain. we managed to work around it but when we got back, it was sent to Truma and we were told that, if it were foind to be frost damage, we would not be covered...

well, we had left for Spain, via France in September and hadnt seen frost for months....

the inspection revealed fault in the internal welding and the unit was replaced without question.....

just out of interest I don't suppose you have to drain down your flush water tank or toilet holding tank, again 'taught' to to do that with caravans to avoid probelms with weight and stability probelms with water sloshing about while towing.

Catsize replied on 23/03/2016 09:11

Posted on 23/03/2016 09:11

This is a brilliant thread as I have no idea what you are tallking about! This wasn't explained in handover and I haven't picked up in it from elsewhere. Have had a new compass corona caravan since July and have never done this draining down thing and wouldn't know how to. Hoping next time we go (this weekend), the manual will help me, but probably not! There is a yellow valve switch under the offside bench seat. Is it something to do with this?

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