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BARGES: All about barges and barging - building, buying, maintaining, equipment, handling on the water, etc.
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TOPIC: Holding tank breathers

Holding tank breathers 09 Jun 2018 08:42 #99282

Ian Williams wrote: My black tank also has a leesan activated charcoal filter which prevents any odour escaping, however I recharge the filter body using loose activated charcoal brought at a fraction of the cost from the internet (used in fish tank filters etc) which I pour into a fine mesh bag placed in the filter housing and cable tie the top. If a tank overfill situation occurs the bag and contaminated charcoal can be removed easily opposed to the leesan cartridge which breaks down and falls apart once “wet”. Additionally a foot of one of the wives tights could substitute the fine mesh bag - make sure she’s finished with it though!!


Thats a great idea, I will try that with our filters

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Holding tank breathers 09 Jun 2018 01:16 #99277

  • Richard Pentreath
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In my case it is the lack of a sufficiently large tank breather that is the problem. I have never detected any odour from my tiny breathers up on deck, and anyway have no opening windows on the port (generator exhaust) side of the ship. It is having two WCs connected to one forward tank that is causing my problem, as the one not being flushed acts as the breather to expel tank overpressure inside the vessel! I will certainly be trying one or other of the six remedies that have been suggested on this thread so far...

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Holding tank breathers 08 Jun 2018 23:33 #99275

My black tank also has a leesan activated charcoal filter which prevents any odour escaping, however I recharge the filter body using loose activated charcoal brought at a fraction of the cost from the internet (used in fish tank filters etc) which I pour into a fine mesh bag placed in the filter housing and cable tie the top. If a tank overfill situation occurs the bag and contaminated charcoal can be removed easily opposed to the leesan cartridge which breaks down and falls apart once “wet”. Additionally a foot of one of the wives tights could substitute the fine mesh bag - make sure she’s finished with it though!!
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Holding tank breathers 08 Jun 2018 23:21 #99274

  • Pete Milne
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This conversation makes me so happy that big, old boats on the mainland are (mostly) allowed to do without black tanks. One of my most unpleasant sights/smells was a permanently-moored living-boat emptying its tank in one go rather than one macerated poo at a time.

Pete

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Pete Milne, Quo Vadis, Europe

Holding tank breathers 08 Jun 2018 21:27 #99273

For newly emptied black tanks (1600 l), if there has been any odour problem, I use an 8g sachet of bakers yeast activated in half a beer bottle of warm water and a little sugar, down the toilet. For showers and washbasin smells, half a teaspoon of sodium bicarbonate flushed down with a little water works well. Rarely have such problems though.
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Holding tank breathers 08 Jun 2018 15:09 #99271

Vetus also do the charcoal type filters, surprisingly the refills are cheaper than the LeeSans. They do work but do eventually allow odour to pass indicating a change is necessary. The grey need changing far more often for us because we fill and empty that tank a lot more.

Another tank dosing product is odorlous, which we used on our narrowboat and found to be very effective.
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Holding tank breathers 08 Jun 2018 14:26 #99270

Hi Richard,

I use Leesan Saniguard. Zero odour!

Regards,
Nige
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Nigel Seaman
Atyrau Ninja

Holding tank breathers 08 Jun 2018 14:16 #99269

Hi Richard,

I use Leesan Saniguard. Zero odour!

Regards,
Nige
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Nigel Seaman
Atyrau Ninja

Holding tank breathers 08 Jun 2018 13:48 #99268

I use a LeeSan charcoal filter — which reminds me it is some years since I put it a new one. No discernible smells from the vent.

Also very little odour when pumping out. I attribute this to regular use of septic tank deodourising enzyme stuff that I get from supermarkets or Weldom large hardware stores. Usually buy Eparcyl but am currently in Cambridge and am unable to check I’ve spelt it right.

Also put a few drops of washing up liquid every so often in the belief that does some lubricating of rubber bits. Sometimes also tip in a few drops of cooking oil.
Paul
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Holding tank breathers 08 Jun 2018 12:13 #99264

LeeSan do a charcoal filter that is supposed to reduce nasty smells from the breather but I don't know how effective they are.
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Holding tank breathers 08 Jun 2018 11:41 #99263

  • Richard Pentreath
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Andy
Thanks for that. I have now to get through the woodwork and find out if the constructors started with a 38mm or Euro 40 mm plastic pipe run - and then reduced to the silly half inch at deck level.

If not, I am faced with the harder job of making a 40mm hole in a tank top made of 3/8" steel plate! But I did learn drilling and filing during my 12 months workshop training as a Westland apprentice...

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Holding tank breathers 08 Jun 2018 10:40 #99261

  • Andy Soper
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Hello Richard,

The norm seems to be a breather of similar diameter to the loo discharge - typically 38mm and plumbed in the same quality of pipe or hose so that it is both a vent and overflow to handle inadvertent over-filling. Unlike houses we live much closer to our vents so any smells are more pervasive. I think you have another job to add to your list of things to do!

An additive such as Elsan Blue will sweeten the odour although some people use biological washing liquid.

While blackwater tends to degrade and break down with time, grey water mutiplies the nasties! Suggest a pump out and wash through and more regular discharges.

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Best Wishes
Andy Soper
DBA - Director Representation
mv Neeltje
Coookham

You don't need a barge to join - a dream of boating in Europe will do'. See www.barges.org

Holding tank breathers 08 Jun 2018 00:00 #99251

  • Richard Pentreath
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My vessel is equipped with a tiny half inch U tube breather on each waste tank. What is the norm on other vessels? The forward black water tank is coupled to two heads, which means that when you flush one you are treated to a belch of sewer gas from the other! On shore, all WCs are coupled to systems that by law must have 3" or 4" vent pipes to prevent displaced air from causing problems.

I thought about removing the caps from the deck suction pipes to improve the breathing, but now realise that this would not work because the pipe(s) connect at the tank base to suck out the contents and therefore cannot help with the air pressure fluctuations that are causing the problem.

And while on the subject, why is it that the colour of the contents of my forward grey water tank is almost jet black?

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