Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 04-12-2013, 08:40   #1
Registered User

Join Date: Apr 2012
Location: RI
Boat: Tartan 3800
Posts: 122
2 hoses 1 thru hull?

Bet it's a bad question but here goes. Can a sink drain and engine raw water be tied into the same thru hull? I'm just trying to avoid drilling a hole for my new Frigoboat keel cooler. I would use the sink dran thru hull for the keel cooler.
__________________

__________________
bmm32005 is offline   Reply With Quote
Old 04-12-2013, 08:49   #2
Senior Cruiser

Cruisers Forum Supporter

Join Date: Mar 2006
Posts: 1,594
Re: 2 hoses 1 thru hull?

I personally would not connect the engine raw water intake to anything else. Too important.
__________________

__________________
Randy

Cape Dory 25D Seraph
rtbates is offline   Reply With Quote
Old 04-12-2013, 08:51   #3
Registered User

Join Date: Jul 2011
Location: Alameda, CA
Boat: C&C Newport 41
Posts: 586
Re: 2 hoses 1 thru hull?

yeah but...

if you mean raw water intake, then no. the 'stuff' you wash down your sink would end up in your engine (assuming it is running) and there is a strainer on that thru hull.

if you mean the exhaust, just make sure u have an inline check valve and the sink 'T' is between the check value and thru hull.

i admit i am struggling to picture a configuration where this seems logical.

why not T into the cockpit or deck drains?
__________________
ssanzone is offline   Reply With Quote
Old 04-12-2013, 09:02   #4
Vendor
 
witzgall's Avatar

Join Date: Oct 2006
Location: Eastern Shore, MD
Boat: Camper Nicholson 44 Ketch
Posts: 1,775
Re: 2 hoses 1 thru hull?

The frigoboat keel cooler thru-hole does not bring water into the boat, it allows a closed loop from the compressor to be cooled outside of the hull.

Chris
__________________
witzgall is online now   Reply With Quote
Old 04-12-2013, 09:07   #5
Registered User

Join Date: Dec 2012
Location: Portsmouth, NH
Boat: Tayana Vancouver 42
Posts: 40
Re: 2 hoses 1 thru hull?

My boat has a custom SS manifold tank with 3 outlets valves which are fed by a single thru hull. The outlets feed 1) engine raw water intake 2) genset raw water intake 3)spare.

Keep in mind this manifold is 3x as vulnerable to a leak as a single dedicated raw water engine line. The manifold and it's hoses all have new hose and all lines are double up on hose clamps for security.
__________________
SailK2 is offline   Reply With Quote
Old 04-12-2013, 11:02   #6
Senior Cruiser
 
jackdale's Avatar

Cruisers Forum Supporter

Join Date: Mar 2008
Location: Calgary, AB, Canada
Posts: 5,048
Images: 1
Re: 2 hoses 1 thru hull?

I have seen a head sink drain and head intake share a thru-hull. It took me some time to figure out why. When the sink fills with water while heeled, you can drain the sink by closing the thru-hull and pumping the head while in the wet bowl position.

Engine raw water = separate thru-hull that is easily accessible.
__________________
ISPA Yachtmaster Ocean Instructor Evaluator
Sail Canada Advanced Cruising Instructor
IYT Yachtmaster Coastal Instructor
ASA 201, 203,204, 205, 206, 214
As I sail, I praise God, and care not. (Luke Foxe)
jackdale is offline   Reply With Quote
Old 04-12-2013, 11:18   #7
Registered User

Join Date: Apr 2013
Location: So Cal
Boat: Catalina 30
Posts: 943
Re: 2 hoses 1 thru hull?

Quote:
Originally Posted by jackdale View Post
I have seen a head sink drain and head intake share a thru-hull....
The other reason is fresh water flush - flush with water from the sink.

Agree with the others - engine thru hull should not be teed in with the galley drain due do junk being washed down and sucked up into the engine cooling loop.
__________________
jeepbluetj is offline   Reply With Quote
Old 04-12-2013, 11:42   #8
Senior Cruiser

Cruisers Forum Supporter

Join Date: Apr 2013
Location: Penobscot Bay, Maine
Boat: Tayana 47
Posts: 995
Re: 2 hoses 1 thru hull?

Quote:
Originally Posted by jeepbluetj View Post
The other reason is fresh water flush - flush with water from the sink.

Agree with the others - engine thru hull should not be teed in with the galley drain due do junk being washed down and sucked up into the engine cooling loop.
Also, I would worry about the engine sucking air down the sink rather than water up through the thru-hull, causing bubbles in the engines heat exchanger and/or failure of the raw water impeller, either of which would cause the engine to overheat. If you are going to "T" an intake, both things it leads to should be either outward or inward flow items and you may need checkvalves in the case where one item creates a very strong suction.
__________________
jtsailjt is offline   Reply With Quote
Old 04-12-2013, 12:55   #9
Registered User

Join Date: Apr 2012
Location: RI
Boat: Tartan 3800
Posts: 122
Re: 2 hoses 1 thru hull?

I'll fire up the hole saw soon. Thanks everyone.
__________________
bmm32005 is offline   Reply With Quote
Old 04-12-2013, 19:35   #10
Sponsoring Vendor
 
Tellie's Avatar

Community Sponsor

Join Date: Oct 2007
Location: Hollywood, Fl.
Boat: FP Athena 38' Poerava
Posts: 3,046
Re: 2 hoses 1 thru hull?

Quote:
Originally Posted by bmm32005 View Post
I'll fire up the hole saw soon. Thanks everyone.

It's the right way and you'll be more happy you did in the long run.
Tellie is offline   Reply With Quote
Reply

Tags
hull, 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




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 17:27.


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.