Chris, hi,
all very interesting. I'll digest this and get back at some point. Grey
water for the toilets appears to be a no-no.
One question if you have a moment, what do you mean by an eco-toilet? Simply
one with a dual flush?
Kind regards,
James
-----Original Message-----
Forum (B) - Chris Grant [mailto:dbabarges-pvYRptiajiAdnm+***@public.gmane.org]
Sent: 14 September 2014 16:21
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water systems
James
We put in 2x750 litre black tanks side by side but connected at the
lowest point underside with a large bore loop. The reason was to
anticipate possible grey laws and then repipe to use half for grey.
There is no indication that this will ever happen in our lifetime.
I were to start afresh, I would plumb all basins, showers etc in grey
solvent ABS/PVC 40mm to main 80mm gravity drained back to a central
float switched macerator where the pumped outlet goes to a three way
valve, overboard or into one of the black/grey tanks.
Don't try to use grey water for loo flushing, it has far more horrible
bacteria that canal water and stinks after a day or two. Use fresh or
optional canal filtered water . If using anything other than fresh for
flushing, ensure good filtration at WC solenoid. A leaking solenoid with
gunge under the seating can sink your ship if you have an auto
pressurised canal water system. It nearly happened to us only it was
fresh water from our 3 ton tanks and it was spotted while on board due
to unusually long running of water pump, also ship wouldn't have sunk as
water already on board in tanks but bilges were flooded with several
hundred litres from overflowing WC.
Again, a fresh start, I would avoid marine WC at eye watering prices
(from UK anyway) and use eco standard back to the wall loos with behind
the wall cisterns piped in solvent 80mm ABS/PVC to central macerator as
per grey with three way valve through bottom of ship or to black tank.
As any bargee will tell you. pumpouts are rare to find and flushing
through the bottom of the ship per use is probably preferable to
emptying 1.5tons in one go into the canal. If you must use marine style
WC then go for the sani compact 230V version available from builders
merchants and on-line. In France these are 290 Euros in Mr Brico, in UK
currently offer for £462 at
http://www.qssupplies.co.uk/bathroom-furniture-shower-taps/18209.htm
Finally, whatever Vetus or any supplier say and however expensive it is,
38mm 'Sanitation hose' is useless and leaches after a year or two
resulting in odour. The small print says to not allow low loops where
sewage can collect, where would that be possible on a barge. We have
almost 30m of very fancy 38mm sanitation hose from two WCs to the black
tanks and after six years it all needs to be changed. Most of it is in
the engine room but the odour is not pleasant and my winter job is to
replace all with thick walled solid swept bend 40mm solvent welded
plastic with George Fischer type valves.
Good luck with the build. Chris Grant www.mvesme.co.uk
Post by DBA Forum (B) - James SmithHi,
an old chestnut but I was thinking of installing a grey water system in my
new-build. I was thinking...
* Pump water from shower, hand basins and washing machine but NOT the
kitchen sink into a grey water tank.
* Supply the water for flushing the heads only.
I see Whale do a range of filterless pumps that would do the job, plus I
need an additional pump to supply water to the toilets.
I'm unsure how marine toilets work, to be honest. They seem not to have
cisterns and to make do with little water.
Does anyone have any thoughts on how to configure this part of the water
system? An overflow from the grey water to the (larger) black water tank
seems a necessity. Plus an override to supply the toilets with fresh water
should the grey water run low.
Kind regards,
James