Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 31-03-2012, 14:56   #1
Senior Cruiser
 
unbusted67's Avatar

Cruisers Forum Supporter

Join Date: Dec 2006
Location: Islesboro, ME
Boat: Looking for a new boat
Posts: 2,196
Images: 24
Drain and Intake on one Thru Hull ?

I just installed a composting head and want to glass in my sewage thru hull and my salt water intake for the toilet. I had a salt water wash down t-ing off of the intake for the toilet that I will no longer be able to use.

My question is this: can I T my salt water wash down into the thru hull that we use for our bathroom sink drain? It is just a salt water wash down so if the first few seconds of spray come up as grey water its not the end of the world. Is this even possible?
__________________

__________________
unbusted67 is offline   Reply With Quote
Old 31-03-2012, 14:59   #2
Registered User

Join Date: Dec 2009
Posts: 3,016
Images: 4
Re: Drain and intake on one thru hull?

You can try it. Keep the Tee low. Might suck air thru the drain.
__________________

__________________
daddle is offline   Reply With Quote
Old 31-03-2012, 15:00   #3
Moderator Emeritus
 
David M's Avatar

Cruisers Forum Supporter

Join Date: Sep 2007
Location: San Francisco Bay
Boat: research vessel
Posts: 10,150
Re: Drain and intake on one thru hull?

No, you never want to connect your sanitation system to any other system in any way. This is for health reasons and smell reasons. Given the right conditions, fluids can flow the wrong way through a hose or pipe. The same applies to your gray water system, potable water system, engine cooling system and your seawater washdown system. All should be isolated from one another so that there is no possibility that one can contaminate the other.

Also, never assume you can get away with it by using a check valve. Check valves can and do fail.

I agree with what Daddle says about the possibility of sucking air.
__________________
David

Life begins where land ends.
David M is offline   Reply With Quote
Old 31-03-2012, 15:24   #4
Senior Cruiser
 
Sailmonkey's Avatar

Cruisers Forum Supporter

Join Date: Sep 2009
Location: Houston
Boat: '76 Allied Seawind II, 32'
Posts: 5,766
Re: Drain and intake on one thru hull?

Our salt washdown is teed to the head sink drain, no problems, I just need to clean the strainer for the pump more often than if it wasn't this way. It occasionally sucks air, but never for more than a 1/2 second or so.
BTW, if you shave the morning that you raise the anchor you'll need to clean the pump strainer!!
__________________
Sailmonkey is online now   Reply With Quote
Old 31-03-2012, 15:46   #5
Senior Cruiser
 
Cheechako's Avatar

Cruisers Forum Supporter

Join Date: Aug 2006
Location: Skagit City, WA
Posts: 19,342
Re: Drain and intake on one thru hull?

Why change it? I've found gurgling in the sink and not a steady flow the one time I tried it.
__________________
"I spent most of my money on Booze, Broads and Boats. The rest I wasted" - Elmore Leonard











Cheechako is offline   Reply With Quote
Old 31-03-2012, 16:07   #6
Registered User

Join Date: Jul 2006
Posts: 3,949
Re: Drain and intake on one thru hull?

I don't see why it wouldn't work. I'd suggest just leaving the old through hulls in place and capping them off rather than glassing them in. You or someone in the future might want to use those through hulls again. I've got a composting head and I've just capped off the through hulls. I was thinking I might use the old intake one for a wash down pump some day. Or I might install a seawater intake for a fridge cooling system some day.
__________________

__________________
Kettlewell Cruising
Kettlewell is offline   Reply With Quote
Reply

Tags
thru hull

Thread Tools
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
Shoestring Sailors (Cruising on $500 per month - part II) David_Old_Jersey General Sailing Forum 1355 13-11-2017 17:32
Problems on a Race from China to SF Bay John A Health, Safety & Related Gear 8 10-05-2012 19:19
Through Hull Speed/Depth Transducer - How Do You Clean? Cruisin Cat Marine Electronics 11 06-04-2012 15:43
60 Feet on the Chesapeake DSDman Dollars & Cents 87 03-04-2012 17:09
Which One Would You Buy - Furuno or Simrad Jaymannyc Marine Electronics 29 01-04-2012 19:19



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 05:24.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.