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Old 02-27-2019, 04:23 PM   #1
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Is this set up OK?

Just looking at a boat with head set up attached Is this OK ?

Notice:

There is no vented loop -- there is a vent that goes from the top of the tank to the side of the hull.

There is no Y valve -- but I can close the seacock and prevent discharge. It would be possible to add a way to lock that shut (although currently it is not locked).

I don't think it would siphon because of the vent to the top -- but this is my main concern.

I am guessing that if I locked the thru hull down the coast guard would be ok

Other thing would be will be laying down in the pipe between the tank and the thru hull ? would a pump out still suck it all out?

any advice appreciated thanks
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Old 02-27-2019, 05:07 PM   #2
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Welcome aboard. I believe you cannot post images until you've made a minimum of 10 posts. But I'm not certain. There is a welcome thread here that might help:

http://www.trawlerforum.com/forums/s22/
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Old 02-28-2019, 09:33 AM   #3
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ok thanks

ok thanks. guess I will have to figure it out or make a bunch of posts!!
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Old 02-28-2019, 10:10 AM   #4
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Is there a pump out top side on the deck? If not then a I would say that is the reason there is no Y valve. You would not be compliant with the regulations as there is no way to pup out at the dock.
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Old 02-28-2019, 12:42 PM   #5
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ok thanks. guess I will have to figure it out or make a bunch of posts!!
You can upload a pic to postimage.org, then link it here.
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Old 02-28-2019, 12:45 PM   #6
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yes

there is a pump out up to the deck. but no y valve. just a T on the discharge side of the holding tank. Also no vented loop ..... but there us a vent from top of tank to side of hull near deck level about 14" above tank

head, inlet and discharge are below waterline. holding tank is above

i will try again to attach drawing
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Old 02-28-2019, 01:40 PM   #7
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I suppose that would work as long as the sea cock was closed when using the dock pump out. There needs to be a pump if you are going to discharge overboard.
I would talk to the owner and ask how this system works.

Check out this link: http://www.westmarine.com/WestAdviso...itation-System
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Old 02-28-2019, 02:08 PM   #8
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Looks like a simple effective system. That set up may be one that has a gravity discharge when offshore where you just open the valve while underway and the tank empties.


I have also been hearing about the need for having a macerator in a system before the holding tank if it is to be pumped out, but i dont know if that is a requirement as I haven't tried to become an expert - i have enough poop to deal with in life as it is....
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Old 02-28-2019, 05:24 PM   #9
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System looks good to me. It should gravity drain if the base of the tank is above the WL. My last boat was set up this way. No macerator pump no fuss.

I donít believe you need a Y valve since the toilet(s) go straight to the holding tank. If anything, you may need a lock on the through hull that gravity drains the holding tank.
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Old 02-28-2019, 09:19 PM   #10
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There needs to be a pump between the holding tank and the T intersection. Without a proper trash pump you will fill your holding tank with sea water when the sea cock is open.
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Old 02-28-2019, 09:48 PM   #11
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ok thanks. guess I will have to figure it out or make a bunch of posts!!



No need to get too involved, just write welcome aboard whenever someone joins and that will give your posts # a tick up .....


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Old 02-28-2019, 09:56 PM   #12
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Originally Posted by trawlerdrake View Post
ok thanks. guess I will have to figure it out or make a bunch of posts!!

Send me a PM and I'll reply with my email address so you can send it to me and I'll post it...prob'ly with a comment and/or question or two.


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Old 02-28-2019, 10:23 PM   #13
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I should have scrolled down before posting....

If the toilet is a sea water toilet, there must be a vented loop in the inlet. On toilets that have a line from the thru-hull to the pump and another line from the pump to the bowl, the loop belongs in the line from the pump to the bowl. It may be necessary on some electric toilets that don't have two inlet sections to install an electric solenoid valve in the loop.

If the tank is entirely above the water line there would be no need for a vented loop or pump in the TANK discharge line because the tank is plumbed to drain via gravity. That would put the discharge fitting IN the bottom of the tank instead of on the end or a side.


If you want the ability to flush the toilet directly overboard you'll need a y-valve in the line from the toilet to the tank. You'll also need a vented loop in the line from the y-valve to the thru-hull. Better yet, you can send everything to the tank, leaving the thru-hull open when at sea outside the "3 mile limit"...closed when inshore.

I'd recommend going with TWO separate discharge fittings in the tank--one in the bottom to dump at sea and the second one to the deck pumpout fitting. And I'd put the second one (to the pumpout fitting) in the top of the tank with a tube inside to the bottom.

I think we'll prob'ly need to talk after you've had time to digest all this, so send me that PM anyway.

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Old 03-01-2019, 12:24 AM   #14
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The only real problem I see is the lack of a vented loop in the intake. If possible the vented loop should be between the intake pump and the bowl, not between the seacock and the pump. If itís between the seacock and intake pump, youíll have a hard time sucking water as the vent will let air into the intake line.

That setup is very similar to what I had except my tank was below the waterline so I couldnít gravity drain the tank. I had a macerator Pump between the tank and the discharge seacock.

A shut off valve at the tank discharge would be nice but I never had one.
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Old 03-01-2019, 12:27 AM   #15
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Thank goodness there is someone on the forum that canít draw any better than I can.
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Old 03-01-2019, 06:52 AM   #16
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You may wish to read applicable regs and touch base Peggy Hall the head mistress before any mods or changes.
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Old 03-01-2019, 08:51 AM   #17
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thank you
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Old 03-02-2019, 06:07 AM   #18
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Most real sea cocks have an operating handle that can be easily removed.

Remove the handle inshore with the sea cock closed and keep it in a drawer.
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Old 03-08-2019, 01:05 PM   #19
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trawlerdrake,

You are onto it! For some reason all of us boaters love nothing more than to over engineer everything- especially head systems.

If you keep the holding tank above the water line that eliminates all kinds of stuff; vented loop, discharge pump, ect. If you can "lock" the discharge sea cock (or remove the handle as a poster suggested) that removes the need for a switch or "Y" valve. Attached set-up allows the tank to be pumped out, or discharged where permitted. (I know some folks read the regs as any over board discharge needs to be "macerated" but thats a loose term and I have yet to find a passage that defines it).

For this set up between the hand pumping and head chemicals flushed into the tank, a fairly liquid result is obtained.

Granted, this is an old school set up; hand pumper with sea water flush. Electric, fresh water flush systems definitely have their advantages, but their weak points as well. Only two things can ruin a beautiful day on the water; engine trouble and a mal-functioning head!

Cheers all - got only 33 days till my launch date!

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Old 03-09-2019, 12:45 PM   #20
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I would be concerened there would be a smell with no Y Valve there is raw sewage sitting in the line from the T to the closed through hull
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