Fitting a holding tank

We're off to the Baltic (hopefully) this year so need to fit one! Any experience of fitting an S38 with one would be appreciated. Is this easily done by oneself or safest to get someone else to do it?
There is a Co in Ipswich who make plastic tanks
Stansa - Joe Paulson, im told is very good
312186
402011
 
Hi Jimi

I had a TekTank made to my drawings and installed it myself. All the other bits came to several hundred pounds.
Tek tanks website has some very useful layout diagrams for various types of installation.

The only major problem was caused by the Jabsco macerator but they have now modified them to overcome the issue. I've had to remove the contents gauge to give it a clean a couple of times and once had to get it pumped out to do the work as it had overfilled. Not many pumpouts on the East coast but there is one at Brighlingsea. Other than that it has been fine for 7 seasons.
 
Jimi
Idle musings led me to put the options onto a small drawing.. I've shown Pavalijo's port wardrobe option (lower plan) but you'll see that his outlet pipe was able to lead directly under the port aft bed to a new seacock... In our single aft cabin (upper plan) we've got floor in the area and not such a 'hidden' path for a 2" outlet hose..
s38 extras.jpg
 
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Martin, I think your pipes from the forward heads is laid out differently (and more sensibly) than mine.

39860127502_d1ce7ef22d_z.jpg


My blue is the existing pipeage, and green what I'm thinking of (subject to measuring etc etc) however If I could reroute the forward heads similar to your diagram I'd be happier with that (and happier with the layout), I need to get the boards up and investigate, but it'll be another week before i can get back to the boat.
 
To be more precise, that forward outlet house on mine doesn't even reach the centerline. The outlet seacock is pretty much under where the seat finishes. There looks to be an original hole glassed in through the under floor bulkheads. I seem to think the same hole is also in the under floor bulkheads all the way to where the holding tank could be located under the steps!

I am about to remove that forward cabinet anyway because it hides the forward shroud deck plate which I want to get to.. Whilst out I'll be measuring the space available behind it.

I was thinking that with the four or five inches behind the cabinet, together with the cabinet internal space there could be enough room for a vertical (25cm front to back) tank...

As to height... It's unused space directly below the cupboard...
 
Hi Jimi

I had a TekTank made to my drawings and installed it myself. All the other bits came to several hundred pounds.
Tek tanks website has some good very useful layout diagrams for various types of installation.

The only major problem was caused by the Jabsco macerator but they have now modified them to overcome the issue. I've had to remove the contents gauge to give it a clean a couple of times and once had to get it pumped out to do the work as it had overfilled. Not many pumpouts on the East coast but there is one at Brighlingsea. Other than that it has been fine for 7 seasons.

RHYC Marina at Woolverstone on the Orwell also has a pump out.
 
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Such composting heads could make a holding tank redundant, a much simpler solution .
I built my own for under $50 , easy to do. Been happily using it for about a decade, works well, and I would never consider a holding tank. They also save a lot of space, over a holding tank.
 
Many on here seem to be in favour of gravity tanks, i.e. installed above the water line. In my experience, a pumped tank below the water line can be a very good alternative and might make it possible to fit a larger tank and/or have shorter hose runs.
Here are a couple of photos of my installation, towards the bow under the fore peak bunks. Stainless steel tank circa 50 litres, 35 years old, no leaks so far...

First shot is from the reinstallation a few years ago, made after some modifications in order to provide for deck pump out.
The stainless tube to the left is part of the pipe work leading up to the deck fitting.
http://www.ybw.com/forums/images/attach/jpg.gif

Next shot with all the pipe work in place. The deck suction line is taken from the T-fitting. Whale Gusher hand pump (110 strokes to empty full tank, could be an electric pump...), sea cock/through hull to the right. The inlet hose to the tank (from the toilet) can be seen far right.
http://www.ybw.com/forums/images/attach/jpg.gif
 

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