Shower Drain

[jackho]

Can anyone help me to find a shower drain fitting - i intend to install a shower on my Bav34 and can't seem to source through any on-line suppliers. It looks like Approx. 25mm dia. As the hole on the floor is sealed with epoxy or similar I don't want to disturb until I get a fitting. It seems like it will have to be quite shallow as the space between the floor pan and hull is only about 25mm.
Also any other advice welcomed with thanks - Jackho

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[steve_cronin]

Try Opal Marine or Chris Hawes at Yachtfractions. Both are Bavaria dealers and should be able to advise.

Our Bavaria has these fittings but both of our showers are connected up. Watch out though, unless you keep the fixing screws tightened, the fitting leaks into the space between the heads liner and the hull which can result in a difficult to remove pong that pervades throughout the ship..

Steve Cronin



<hr width=100% size=1>The above is, like any other post here, only a personal opinion

 

[HeadMistress]

I hope you DO plan to route the drain into a sump...not just into the bilge? Shower water is full of soap scum, body oils and bacteria that can quickly make a boat smell like a swamp or even a sewer, especially in hot weather. They can do it in a sump too...but sumps are MUCH clean than entire bilges.

<hr width=100% size=1>Peggie Hall
Specializing in marine sanitation since 1987

 

[philip_stevens]

Try your local caravan accessory shop.

<hr width=100% size=1>regards,
Philip

 

[jackho]

Thank you for the advice but I intend to install an online pump on the drain to discharge. I guess some residual will remain in the drain loop as the pump will have to be mounted above the pan level but at least it is accessable to disinfect.
Regards Jacko

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[HeadMistress]

As long as it's not going into the bilge. Showers and iceboxes that drain into bilges are reponsible for stinky boats than sanitation systems.

<hr width=100% size=1>Peggie Hall
Specializing in marine sanitation since 1987

 

[steve_cronin]

Who mentioned ........

...letting the grey waste into the bilges?

What do you think we are madam? Uncivilised European morons or something?

BTW, have you yet come to terms with the fact that "allowing water to find it's own level" and "syphoning" are the same thing as it seems from some of your previous postings that you are confused on this matter?

Steve Cronin



<hr width=100% size=1>The above is, like any other post here, only a personal opinion

 

[HeadMistress]

Re: Who mentioned ........

My dear sir, they are NOT the same thing. Water seeking its own level is pushing the water through a hose and will only rise in a hose till it achieves equilibrium. A siphon, otoh, pulls it through a hose and can even do so over the top of a loop above the waterline if no air can get into the hose to interrupt the flow.

You'd also be astonished I think at the number of production boat builders (allegedly good ones, as well as "low end")--power AND sail --who aren't civilized enough to know better than to plumb showers and ice boxes, and even air conditioner condensate, to drain into the bilge instead of into sumps--a condition I've had to correct on two of my own boats.

<hr width=100% size=1>Peggie Hall
Specializing in marine sanitation since 1987

 

[steve_cronin]

SAME THING....

MADAM,

WATER TRAVELLING (WHAT DO YOU MEAN PUSHING-PULLING?) DOWN A PIPE FROM ONE RESERVOIR TO ANOTHER WILL CONTINUE TO DO SO UNTIL IT REACHES IT'S OWN LEVEL - SIMPLE. THE FACT THAT THE PIPE GOES UP AND DOWN IN BETWEEN IS IRRELEVANT.

LETS HAVE A VOTE ON IT HERE AMONGST THOSE SCIENTIFICALLY EDUCATED
SORRY ABOUT UPPER CASE - DODGY KEYBOARD

STEVE CRONIN

<hr width=100% size=1>The above is, like any other post here, only a personal opinion

 

[boatless]

Re: SAME THING....

'Fraid I'm with Steve here. Siphon stops as water finds it's own level - if given the chance.

<hr width=100% size=1>my opinion is complete rubbish, probably.

 

[flaming]

Re: Who mentioned ........

I'm confused.

Having sailed a boat who's shower drains into the bilge and is then effortlessly discharged over the side by the automatic bilge pump for the last seven years I have never ever noticed a smell.
What do you people do in the shower!

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[HeadMistress]

Re: SAME THING....

That's not the point. Water simply seeking its own will not rise over the top of an arch that's above the waterline...it will simply rise in the hose to the waterline ahead of the arch and stop. A siphon once started WILL continue over an arch above the waterline till the water coming out the hose at the other end reaches the waterline.

I'll leave it to those more fluent in fluid dynamics to explain why.




<hr width=100% size=1>Peggie Hall
Specializing in marine sanitation since 1987

 

[BrendanS]

Re: SAME THING....

As someone with a fairly large scientific training, Headmistress is correct. Read her post again, it is technically correct.

<hr width=100% size=1>Me transmitte sursum, caledoni

 

[MainlySteam]

Re: Who mentioned ........

Hi Steve

I would be the last to say you folks are anything other than very civilised (I had to prise my lips apart to get that out), but I do have to say that I know of a few boats that have arrived out here from UK that have their grey water drain to the bilge for pumping out with the bilge pump. I also have to say there are some owned by NZ'ers that do the same /forums/images/icons/frown.gif but I think, as here and USA, it would be most unusual on new production boats of any merit whatsoever though, and certainly not on a custom build.

John

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[cliff]

Re: SAME THING....

'fraid I'm with Peggy here.

Simple explaination:
Disconnect the toilet outlet from the valve at the hull fitting and open the valve - result, the water will flow until it finds its own level, it flows from a higher level to a lower level then stops (and you sink).

Now go sailing along heeled over, toliet below sea level and slam her down so that you force water up the inlet and over the loop and you have a siphon where the water tries to find a lower level but rises in level first by means of a siphon.

Siphoning and finding its own level are two different things.

BTW the highest a siphon can operate is 33 feet that is from the watersurface to the top of the siphon cannot exceed 33 feet (fresh water) - salt water will be less.

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[steve_cronin]

Re: SAME THING....

Not what I was saying.

Take any two water vessels at different elevations and connect them by a pipe (full of course) wether from sub-surface fittings or simply looped over the sides of the vessels and water will flow until it has found it's own level.

The fact that water to a height of approx 33ft can be supported by air pressure is not relevant and anyway you can't get at it because once you open the pipe the water "finds it's own level" and drops back into each vessel.

When you try to syphon petrol out of your car, the outlet needs to be below the level of the fuel in the tank. Syphoning cannot just happen, air needs to be excluded first. These are just elementary physical phenomena.

Steve Cronin



<hr width=100% size=1>The above is, like any other post here, only a personal opinion

 

[steve_cronin]

Re: SAME THING....

Thanks for your support. It's just trivial. When two vessels containing fluid at different heights are connected together by a tubular link, fluid will always flow from the higher to the lower. The particular case of them being connected by a filled tube over the edges alters nothing.

Steve Cronin



<hr width=100% size=1>The above is, like any other post here, only a personal opinion

 

[steve_cronin]

Stop trying to complicate matters madam....

You have just described "water finding it's own level" - the waterline. It is immaterial as to wether or not the connection goes up in a loop (so long as it is full) or not. Incidentally, you weren't suggesting that a syphon needs an external stimulus to start it, were you? Simply a difference in levels will do it.

Steve Cronin

<hr width=100% size=1>The above is, like any other post here, only a personal opinion