Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 03-06-2014, 09:33   #1
Registered User

Join Date: Mar 2014
Posts: 3
Hose connection question

I have four throughulls in my engine room and I just repurposed one for my watermaker. The others are engine, generator, and aft head. I need to add the salt water pickup for my sink/anchor washdown to one of these throughulls. Rather than adding another hole in my boat by installing another throughull, I would like some alternative ideas on how to do it.
I can add a T, or a Y to the watermaker or head line - that's the easiest but what stops pulling water from the inboard area rather than the seacock? And is there a problem with cross contamination?
I have heard about using less throughulls and drawing off an inboard reservoir?
How does this prevent the problems discussed above?
I can use one way valves but do they add restrictions to the flow?
Anyone have any experience with doing this project?
__________________

__________________
JohnGleadle is offline   Reply With Quote
Old 03-06-2014, 10:37   #2
Head in a locker
 
Cavalier's Avatar

Cruisers Forum Supporter

Join Date: Dec 2010
Location: Houston, TX
Boat: Beneteau 461 47'
Posts: 878
Images: 1
Re: Hose connection question

Quote:
Originally Posted by JohnGleadle View Post
I have four throughulls in my engine room and I just repurposed one for my watermaker. The others are engine, generator, and aft head. I need to add the salt water pickup for my sink/anchor washdown to one of these throughulls. Rather than adding another hole in my boat by installing another throughull, I would like some alternative ideas on how to do it.
I can add a T, or a Y to the watermaker or head line - that's the easiest but what stops pulling water from the inboard area rather than the seacock? And is there a problem with cross contamination?
I have heard about using less throughulls and drawing off an inboard reservoir?
How does this prevent the problems discussed above?
I can use one way valves but do they add restrictions to the flow?
Anyone have any experience with doing this project?
If at all possible, I would avoid any dual use of the engine or watermaker intakes - as you wouldn't want to cause any flow issues with those.

I'd run a Tee off the aft-head intake downstream of the seacock. I doubt you're going to be concerned with any cross-contamination between the heads inlet and the wash-down pump. If you're concerned about cross-contamination, you could always put a check-valve in the heads-inlet downstream of the Tee to ensure that fluid can't be pulled into the wash-down pump, however flow is more likely to come from the unrestricted through-hull.

The majority of check-valves are sized such that there isn't a reduction in cross-sectional flow area, which is why the bodies of the valves are quiet large compared to the line-size.

Hope this helps.
__________________

__________________
"By day the hot sun fermented us; and we were dizzied by the beating wind. At night we were stained by dew, and shamed into pettiness by the innumerable silences of stars."
Cavalier is online now   Reply With Quote
Old 03-06-2014, 11:22   #3
Senior Cruiser
 
Blue Stocking's Avatar

Cruisers Forum Supporter

Join Date: Dec 2008
Location: St. Georges, Bda
Boat: Rhodes Reliant 41ft
Posts: 4,114
Re: Hose connection question

My foredeck washdown is supplied from my forward head tee'd thruhull, with a clapper type non-return, It has never affected the head. Its volume easily overcomes the vented loop pick-up for the head.
__________________
so many projects--so little time !!
Blue Stocking is offline   Reply With Quote
Old 03-06-2014, 12:32   #4
Moderator
 
a64pilot's Avatar

Cruisers Forum Supporter

Join Date: Oct 2013
Location: Albany Ga.
Boat: Island Packet 38
Posts: 17,034
Re: Hose connection question

Apparently both my heads have drawn off the engine's seacock, and have done so for 27 yrs with no issue, and no check valves of any kind.
I'm installing a second AC and have planned on Ting into the fwd head's supply line, that would make one engine, two heads and one AC pulling from one seacock. Fewer holes in my boat, the better.
Oh, and check valves are things that stick in my experience
__________________
a64pilot is offline   Reply With Quote
Reply

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
For Sale: Turncouple hose connection/disconnection assemblies $50.00 Watercolor Classifieds Archive 0 06-02-2012 11:08
Forty Year-Old Aeroquip-Style Screw on Hose Ends Work on New Hose sdowney717 Engines and Propulsion Systems 0 10-11-2011 09:14
Sealing Hose Connection kb79 Plumbing Systems and Fixtures 8 13-10-2009 12:47
US hose on metric hose barb coot Construction, Maintenance & Refit 5 04-03-2006 20:22
toilet hose seacock connection seafox Construction, Maintenance & Refit 12 02-09-2005 07:32



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 13:25.


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.