Cruisers Forum
 


Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on Cruisers Forums. Advertise Here
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 04-07-2023, 08:27   #1
Registered User

Join Date: Dec 2021
Location: Sailing in the Med
Boat: Moody 425
Posts: 84
Head inlet teed into sink drain, but…

Hi, we recently had issues with our aft head holding tank (pinhole leakages, smelly hoses, etc). Removed the holding tank for cleaning/repair, replaced old for new Jabsco toilet and will replace all hoses.

Since we will have a watermaker soon I am planning to tee in the head inlet to the sink drain and use freshwater to flush. This will free up a seacock for the watermaker.

Since I don’t want to open and close the sink seacock everytime I use the head I am contemplating to leave it close all the time. This means that after using the head the soapy water from washing hands (and perhaps washed down toothpaste from guests so now and then) will end up in the holding tank.

Any specific objections against this?
__________________
Pep
Pepijn is offline   Reply With Quote
Old 04-07-2023, 09:06   #2
Registered User

Join Date: Feb 2013
Posts: 90
Re: Head inlet teed into sink drain, but…

Sounds like a great idea! Good luck
alamoana is offline   Reply With Quote
Old 04-07-2023, 10:41   #3
CLOD
 
sailorboy1's Avatar

Join Date: Jul 2007
Location: being planted in Jacksonville Fl
Boat: none
Posts: 20,548
Re: Head inlet teed into sink drain, but…

Quote:
Originally Posted by Pepijn View Post

Any specific objections against this?
You are connecting the watermaker supply to old head supply not to the sink drain line right?
__________________
Don't ask a bunch of unknown forum people if it is OK to do something on YOUR boat. It is your boat, do what you want!
sailorboy1 is offline   Reply With Quote
Old 04-07-2023, 11:05   #4
Registered User

Join Date: Dec 2021
Location: Sailing in the Med
Boat: Moody 425
Posts: 84
Re: Head inlet teed into sink drain, but…

Not the sink drain no. Too high: near or at waterline. I will use the old head inlet for the watermaker.
__________________
Pep
Pepijn is offline   Reply With Quote
Old 04-07-2023, 18:19   #5
Marine Service Provider
 
peghall's Avatar

Join Date: Feb 2011
Posts: 3,062
Re: Head inlet teed into sink drain, but…

using gray water to flush any toilet is a bad idea because soap scum, body oils, toothpaste etc can build up on parts in toilet pumps, causing problems.



But it's not necessary to use fresh water from the sink for every flush.Tee the toilet intake line into the sink drain line below the waterline...as close to the thru-hull as possible. Flush normally using sea water, switching to CLEAN fresh sink water to rinse all the sea water out the system before the boat will sit or if picking up some skanky sea water makes it necessary to rinse it out of the system immediately. Then you just close the sink drain thru-hull, fill the sink with clean fresh water, flush the toilet to rinse out the ENTIRE system...intake line, pump, channel in the rim of the bowl AND the toilet discharge line.


Doing it this way gives you the best of both worlds...you eliminate sea water odor problems and odors without having to sacrifice but a little of your fresh water for toilet flushing.


-Peggie
__________________
© 2024 Peggie Hall
Specializing in marine sanitation since '87.
Author "The NEW Get Rid of Boat Odors"
peghall is offline   Reply With Quote
Old 05-07-2023, 16:56   #6
Registered User

Join Date: Mar 2009
Location: Southern Chesapeake Bay
Boat: Norseman 430, Jabberwock
Posts: 1,438
Re: Head inlet teed into sink drain, but…

This is how I re-plumbed my sink drains years ago, based on Peggie's advice.

We have had no issue with soap, etc. fouling the head parts, but perhaps we don't use much soap!

Whatever, what Peggie says about a final flush with fresh water is helpful.

Plumbing the intake and sink drain together also makes it easy to winterize the head. And if you find yourself briefly living on board while hauled out, the head can still work. To the holding tank of course!
ggray is offline   Reply With Quote
Old 05-07-2023, 22:05   #7
Registered User

Join Date: Dec 2021
Location: Sailing in the Med
Boat: Moody 425
Posts: 84
Re: Head inlet teed into sink drain, but…

Thanks for the great advices! We will connect the head to the sink outlet. But as Peggy writes we will regularly do a freshwater flush. As liveaboards I will make it a weekly routine.
__________________
Pep
Pepijn is offline   Reply With Quote
Old 05-07-2023, 22:08   #8
Registered User

Join Date: Dec 2021
Location: Sailing in the Med
Boat: Moody 425
Posts: 84
Re: Head inlet teed into sink drain, but…

Thanks for the great advices! We will connect the head to the sink outlet. But as Peggy writes we will regularly do a freshwater flush. As liveaboards I will make it a frequent routine.
__________________
Pep
Pepijn is offline   Reply With Quote
Old 05-07-2023, 22:23   #9
Registered User
 
Fore and Aft's Avatar

Join Date: Jan 2015
Location: Gympie
Boat: Volkscruiser
Posts: 2,793
Re: Head inlet teed into sink drain, but…

We have our toilet teed into the sink outlet as well. Great for us since we beach our boat all the time. Never had a problem in 6 years.
Cheers
Fore and Aft is offline   Reply With Quote
Old 14-06-2024, 18:33   #10
Registered User

Join Date: Mar 2017
Location: lake st. clair
Boat: 77' hallberg rassy 41
Posts: 26
Re: Head inlet teed into sink drain, but…

So no trap? Does is stink? How do we prevent holding tank air coming up the sink when dumping the tank?
bstruebing is offline   Reply With Quote
Old 15-06-2024, 08:45   #11
Marine Service Provider
 
peghall's Avatar

Join Date: Feb 2011
Posts: 3,062
Re: Head inlet teed into sink drain, but…

You're only teeing the toilet's flush water INTAKE line into the sink drain line. "Air" or anything else from the holding tank can only come into the toilet via the toilet's DISCHARGE line. To be able to bring in any flush water, the tee must be installed below the waterline...and btw, this only works if the sink drain thru-hull is below the waterline and on the same side of the keel as the toilet. Any odor in the sink from the drain line would be from something stinky in the sink that went down the drain.


--Peggie
__________________
© 2024 Peggie Hall
Specializing in marine sanitation since '87.
Author "The NEW Get Rid of Boat Odors"
peghall is offline   Reply With Quote
Old 15-06-2024, 09:07   #12
Registered User

Join Date: Oct 2021
Location: On my boat
Posts: 169
Re: Head inlet teed into sink drain, but…

Our boat has the toilet intake pipe and sink waste pipe combined in a bronze tee at the seacock. The boat is 44 years old and it has been built like this. The system works really well. By combining the pipes with a tee after the seacock, you can leave the seacock open and the sink waste discharges to the sea and the toilet intake pulls from the sea. Once the seacock is closed, you can pump toilet inlet water from the wash hand basin. This is perfect for when you want to leave the boat as you can pump fresh water into the toilet bowl.
Wandering1 is offline   Reply With Quote
Old 15-06-2024, 09:10   #13
Marine Service Provider
 
peghall's Avatar

Join Date: Feb 2011
Posts: 3,062
Re: Head inlet teed into sink drain, but…

Is there a trap in your head sink drain now? It would be highly unlikely! You'd only be teeing the toilet's flush water INTAKE line into the sink drain...the toilet PULLS seawater in via the sink drain thru-hull.

I first heard of teeing the toilet intake line into the head sink drain line from a Tartan owner. in the mid-90s....Tartan used to plumb their boats this way to eliminate a thru-hull. I thought i was a such great idea that I began recommending it as the best way eliminate sea water odor in the head from the dead and decaying micro--and sometimes not-so-micro animal and vegetable sea life left sitting the head intake while the boat sits. Just pouring water into the bowl only rinses out the toilet discharge line, it doesn't recirculate--and you wouldn't want it to!--through the intake line, pump and the channel in the rim of the bowl. A sinkful of clean water flushed through the toilet does.
You can flush with fresh from the sink every time or only use it to rinse the seawater out of the entire system before the boat will sit or any other time you feel the need to do so.

I do recommend that you keep a plug in the sink except when using it 'cuz when the boat is underway and heeled to the side the sink drain thru-hull is on, it can turn the sink drain into a fountain!


--Peggie
__________________
© 2024 Peggie Hall
Specializing in marine sanitation since '87.
Author "The NEW Get Rid of Boat Odors"
peghall is offline   Reply With Quote
Old 15-06-2024, 13:54   #14
Registered User

Join Date: Oct 2021
Location: On my boat
Posts: 169
Re: Head inlet teed into sink drain, but…

Quote:
Originally Posted by peghall View Post
Is there a trap in your head sink drain now? It would be highly unlikely! You'd only be teeing the toilet's flush water INTAKE line into the sink drain...the toilet PULLS seawater in via the sink drain thru-hull.

I first heard of teeing the toilet intake line into the head sink drain line from a Tartan owner. in the mid-90s....Tartan used to plumb their boats this way to eliminate a thru-hull. I thought i was a such great idea that I began recommending it as the best way eliminate sea water odor in the head from the dead and decaying micro--and sometimes not-so-micro animal and vegetable sea life left sitting the head intake while the boat sits. Just pouring water into the bowl only rinses out the toilet discharge line, it doesn't recirculate--and you wouldn't want it to!--through the intake line, pump and the channel in the rim of the bowl. A sinkful of clean water flushed through the toilet does.
You can flush with fresh from the sink every time or only use it to rinse the seawater out of the entire system before the boat will sit or any other time you feel the need to do so.

I do recommend that you keep a plug in the sink except when using it 'cuz when the boat is underway and heeled to the side the sink drain thru-hull is on, it can turn the sink drain into a fountain!


--Peggie
My Van de Stadt Trintella 44 had this as standard in 1980. Its been around a long time
Wandering1 is offline   Reply With Quote
Reply

Tags
head

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
why does my head sink drain have a one way valve MooGroc Plumbing Systems and Fixtures 15 08-04-2017 08:52
shower drain through head inlet Rick Williams Construction, Maintenance & Refit 1 12-01-2016 14:51
Galley/Head sink drain hose reduction before thru-hull? Beersmith Plumbing Systems and Fixtures 10 31-01-2015 09:22
What happens when you stick a hosepipe into your gally sink drain tropicalescape Plumbing Systems and Fixtures 8 06-12-2013 07:29
Galley Sink Drain SkiprJohn Construction, Maintenance & Refit 11 14-11-2008 15:18

Advertise Here


All times are GMT -7. The time now is 02:30.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.