BlueLancer
Well-Known Member
Whats the optimum size for waste water tank storage. Assuming 2 people on board most of the time when boat in use.Fitting toilet , wash hand basin and shower to boat which do's not have any of these items.
Waste Water Tank
- Thread starter BlueLancer
- Start date
Greg2
Well-Known Member
Most likely to be dictated by the size you can fit in. Holding tanks for the toilet (black waste) are usually separate from tanks for waste water (grey waste) and many bats (I would say most) don't have grey waste tanks and simply discharge sinks overboard.
Tek Tanks do a range of ready made tanks and we fitted one (toilet holding tank) - not sure of the size but 80 litres sticks in my mind. I would have gone a little larger as there are four of us but it was the biggest that would fit.
Tek Tanks do a range of ready made tanks and we fitted one (toilet holding tank) - not sure of the size but 80 litres sticks in my mind. I would have gone a little larger as there are four of us but it was the biggest that would fit.
Tranona
Well-Known Member
Get onto the Tek Tanks and Lee Sanitation websites and you will see plenty of information on designs and layouts of waste tank systems. As already noted size is usually constrained by space - particularly when fitting into an existing boat. 40-80 litres is typical and there are ways of getting maximum use out of the capacity.
PaulGooch
Well-Known Member
I see no need to run the grey water to the tank, just pipe the toilet to it. The holding tank on ours is 50 litres and it's never been more than about half full. That's with 2 onboard at weekends. It does get emptied most weekends, as we put to sea most time we are at the boat. We have used it for 3 or 4 weekends in a row without emptying it though.
How quick it fills up might also depend on the amount of lager and/or curry you both consume
How quick it fills up might also depend on the amount of lager and/or curry you both consume
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Deleted User YDKXO
Guest
I see no need to run the grey water to the tank, just pipe the toilet to it. The holding tank on ours is 50 litres and it's never been more than about half full. That's with 2 onboard at weekends. It does get emptied most weekends, as we put to sea most time we are at the boat. We have used it for 3 or 4 weekends in a row without emptying it though.
How quick it fills up might also depend on the amount of lager and/or curry you both consume
Agree with that. I've never seen a boat where the grey water waste is run into the black water tank. One long shower and you'd fill the tank. Having said that, I think its a good idea to run the grey water into a separate sump with its own discharge pump rather than directly overboard as you can turn the pump off if you are in an anchorage with swimmers about.
BlueLancer
Well-Known Member
Thanks for the imput guys. As to grey water overboard is that exceptable on inland waterways?
dmst
Member
waste water tank
We are on the Thames and discharge our grey water into the river. As far as I know there is no restriction on inland water ways (in the UK) against doing this.
We are on the Thames and discharge our grey water into the river. As far as I know there is no restriction on inland water ways (in the UK) against doing this.
rafiki_
Well-Known Member
I believe it is ok to pump grey water to the river, but it is sensible to do this away from the Marina and into themain running river.
AllanJ
Well-Known Member
Balance
You may want to consider placement and size from the perspective of balance of the boat. As our black tank fills the boat takes on an increasing list which can be as much as 6" at the water-line (It is a 34' stern-drive mobo). The black tank was a retro-fit and is the only asymmetric installation.
Just a thought.
Of course, there may not be that many options available!
You may want to consider placement and size from the perspective of balance of the boat. As our black tank fills the boat takes on an increasing list which can be as much as 6" at the water-line (It is a 34' stern-drive mobo). The black tank was a retro-fit and is the only asymmetric installation.
Just a thought.
Of course, there may not be that many options available!