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Leaving fresh water tanks full or empty

  • Colin Stone
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05 Nov 2023 14:38 #1 by Colin Stone
Replied by Colin Stone on topic Leaving fresh water tanks full or empty
I've just come across 'elf 'n safety in new shower mixer bars. The inlets have non return valves, so putting antifreeze in through the outlet doesn't work. Luckily the water connections can be removed with a large allen key and the NRVs discarded. 

Colin Stone
It's not the destination, it's the glory of the ride.
Barge Register KEI

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  • Peter Milne
  • Quo Vadis
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28 Jul 2023 19:19 #2 by Peter Milne
Replied by Peter Milne on topic Leaving fresh water tanks full or empty
I like Colin's idea to connect to the tap.  When necessary, I do it from the tank end - where I have a tee valve, with a flexible pipe I put in a 5L bidon of anti-freeze.  Then I open each tap in turn until the pink stuff appears. That protects the taps, pipework and the pump.

Pete Milne, Quo Vadis & De Zwaan , Gent.

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  • Colin Stone
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28 Jul 2023 16:20 #3 by Colin Stone
Replied by Colin Stone on topic Leaving fresh water tanks full or empty
Great to read Peter. 

I'd just reiterate an option to add non toxic antifreeze through the fitting end.  Most tap ends etc unscrew and a garden hose adapter can be fitted.

Then the unadulterated AF washes out the water and coats the important valve bits before trickling down the supply pipes.  

Colin Stone
It's not the destination, it's the glory of the ride.
Barge Register KEI

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  • Peter Fall
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28 Jul 2023 12:25 #4 by Peter Fall
Replied by Peter Fall on topic Leaving fresh water tanks full or empty
Gentlemen, despite the early warning on this post, I think there is some consensus. I happily will take the advice (?) to leave the tank full as I did in the cooler UK. I will continue to drain down for our winter leave and add anti-freeze to run through the pipes and fittings. 
As ever I am indebted to your shared wisdom. 

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  • Balliol Fowden
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26 Jul 2023 18:49 #5 by Balliol Fowden
Replied by Balliol Fowden on topic Leaving fresh water tanks full or empty

Colin Stone wrote: Agree, Balliol. 
We left KEI for 2 months end Oct 22 and I thought pre Xmas doesn't do really cold weather. So didn't bother draining. 




I never used to worry too much about frost before December, but last year, post-covid (?), we went to the other extreme. I drained down in I think August just in case we couldn't get out and new restrictions came in. I think there was talk of a new variant that might have got the wind up me! It is only a 15 minute job however so nothing lost.

Having said that I will be joining the riots if the govt. tries to lock us down again!

Balliol.

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  • Peter Milne
  • Quo Vadis
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26 Jul 2023 18:11 #6 by Peter Milne
Replied by Peter Milne on topic Leaving fresh water tanks full or empty

Balliol Fowden wrote: Just on a point of order I have to say I am wary of the statement "when we had winters."

We have probably all got a little bit slack but, quite apart from the unpredictability of weather, we do still have cold winters. Last winter was long and pretty chilly and I was glad when it finally warmed up but I don't recall it being anything like as cold (in terms of absolute minimum temperatures) as some previous winters, such as 2018 (beast from the east) or 1997/8. 

Absolutely! And of course it depends where you are.  I confess to wintering aboard in recent years but previously haven't winterised seriously since 2010/11/12 in Holland when we were well iced-in for many weeks - but I'm now in far warmer Gent where there was just enough ice last winter to surprise the coots & moorhens last winter.

Pete Milne, Quo Vadis & De Zwaan , Gent.

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  • Colin Stone
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26 Jul 2023 18:05 #7 by Colin Stone
Replied by Colin Stone on topic Leaving fresh water tanks full or empty
Agree, Balliol. 
We left KEI for 2 months end Oct 22 and I thought pre Xmas doesn't do really cold weather. So didn't bother draining.  In the Nov 22 freeze, two shower bar mixers "popped" but at least the FW pump was switched off and tank closed  At £30 off a well known website for new mixer, not too bad a hit.
A shut down check list is worth its weight in gold. 
I don't think air pressure would pop it, but the water pushed into the brass gubbins and then freezing would. At least sat in the water, there is warmth from the canal bottom. 

Colin Stone
It's not the destination, it's the glory of the ride.
Barge Register KEI

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  • Chris Green
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26 Jul 2023 17:00 #8 by Chris Green
Replied by Chris Green on topic Leaving fresh water tanks full or empty
> But maybe my long-helm belief that the guy doing the job was to blame
> is inaccurate!

I rather like that typo! :-)

--
Chris Green
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  • Peter Cawson
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26 Jul 2023 16:29 #9 by Peter Cawson
Replied by Peter Cawson on topic Leaving fresh water tanks full or empty

Balliol Fowden wrote: p.s. for those interested the biggest number of claims resulted from frozen bar type shower mixers, where the relatively small quantity of contained water freezes more readily and can only expand longitudinally, popping off the thermostatic capsule on the end of the bar. Not too bad so long as the water pump was switched off, but you would be amazed how many were not!


I returned to the boat one year to find just that - the shower bar had burst.  I don't think it was caused by a slug of ice, but by the high air pressure used to clear water from the plumbing duting winterisation, probably with the shower valve not being first opened.  But maybe my long-helm belief that the guy doing the job was to blame is inaccurate!

Peter



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  • Balliol Fowden
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26 Jul 2023 16:12 #10 by Balliol Fowden
Replied by Balliol Fowden on topic Leaving fresh water tanks full or empty
Just on a point of order I have to say I am wary of the statement "when we had winters."

We have probably all got a little bit slack but, quite apart from the unpredictability of weather, we do still have cold winters. Last winter was long and pretty chilly and I was glad when it finally warmed up but I don't recall it being anything like as cold (in terms of absolute minimum temperatures) as some previous winters, such as 2018 (beast from the east) or 1997/8. 

The difference was that it was a long sustained cold spell which really let the ice develop. I dealt with quite a significant number of frost damage claims on boats resulting from that period leading up to Christmas last year, more so than I recall in the preceding few years. I would counsel not to get too laid back about winterising!

Balliol.

p.s. for those interested the biggest number of claims resulted from frozen bar type shower mixers, where the relatively small quantity of contained water freezes more readily and can only expand longitudinally, popping off the thermostatic capsule on the end of the bar. Not too bad so long as the water pump was switched off, but you would be amazed how many were not!
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