CS36 head intake vented loop - SailNet Community
 
LinkBack Thread Tools
post #1 of 6 Old 09-12-2013 Thread Starter
Member
 
Join Date: Nov 2009
Location: San Francisco, CA
Posts: 34
Thanks: 1
Thanked 0 Times in 0 Posts
Rep Power: 0
 
CS36 head intake vented loop

Hey guys, i've been re-doing all the head plumbing on my CS36 and noticed that there is not a vented loop on the head intake hose. There is for the discharge but not the intake. According to the CS36 manual that's how it came from the factory. It seems as if the intake/toilet is right at or just below the waterline, at least on port tack anyway. Has anyone else noticed this or added one? I have found the CS36 to be a very well designed and thought out boat and can only deduce there is probably a good reason why they didn't do this initially, but it goes against everything that i've read about proper head plumbing installations. Any comments?

thanks.
Nias is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #2 of 6 Old 09-12-2013
Senior Member
 
Maine Sail's Avatar
 
Join Date: Jan 2003
Location: Maine Coast
Posts: 5,887
Thanks: 20
Thanked 222 Times in 169 Posts
Rep Power: 16
       
Re: CS36 head intake vented loop

Quote:
Originally Posted by Nias View Post
Hey guys, i've been re-doing all the head plumbing on my CS36 and noticed that there is not a vented loop on the head intake hose. There is for the discharge but not the intake. According to the CS36 manual that's how it came from the factory. It seems as if the intake/toilet is right at or just below the waterline, at least on port tack anyway. Has anyone else noticed this or added one? I have found the CS36 to be a very well designed and thought out boat and can only deduce there is probably a good reason why they didn't do this initially, but it goes against everything that i've read about proper head plumbing installations. Any comments?

thanks.
The vented loop does not go in the intake it goes between the outlet of the pump and the back of the bowl. I had to re-plumb ours to make it right.

Factories do lots of STUPID things, even good builders like CS. Things like installing check valves on centrifugal/Rule type pumps, solid copper AC wire and siphon breaks on intakes among other stupid items.. These are all lack of RTFM events....


You will need to drill a few holes behind the head to route the hose to the siphon break, behind the medicine cabinet, and hoses between the back of the bowl and pump.

Not a tough job but one that should be corrected.

______
-Maine Sail / CS-36T


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.




Images In Posts Property of Compass Marine Inc.


Maine Sail is offline  
Quote Quick Reply Share with Facebook
post #3 of 6 Old 09-12-2013 Thread Starter
Member
 
Join Date: Nov 2009
Location: San Francisco, CA
Posts: 34
Thanks: 1
Thanked 0 Times in 0 Posts
Rep Power: 0
 
Re: CS36 head intake vented loop

Hey Maine Sail, thanks, i had a feeling that might be the case. And thanks for pointing out that the siphon break should be between the pump and the back of the bowl. I missed that part reading peggy hall's book but went back and re-read it and now i understand why it's supposed to be there and not on the intake.
Nias is offline  
Quote Quick Reply Share with Facebook
post #4 of 6 Old 09-12-2013
Senior Member
 
jimrafford's Avatar
 
Join Date: Jan 2011
Location: ct
Posts: 644
Thanks: 1
Thanked 16 Times in 16 Posts
Rep Power: 5
 
Re: CS36 head intake vented loop

That's how my 36 was set up
Jim

S/V Deja Vu
CS 40
jimrafford is offline  
Quote Quick Reply Share with Facebook
post #5 of 6 Old 10-21-2013
Member
 
serenespeed's Avatar
 
Join Date: Apr 2010
Posts: 34
Thanks: 1
Thanked 0 Times in 0 Posts
Rep Power: 0
 
Re: CS36 head intake vented loop

I'd like to hijack the thread back to Mainesail's comment about "installing check valves on centrifugal/Rule type pumps"...

I noticed a check valve, under the quarter-birth, for my centrifugal/Rule bilge pump on my CS36. I did not think anything about it. I assumed it was to stop back-flow from the almost deck level through-hull. Do centrifugal pumps stop back-flow on their own, by design? or?

Thanks.
serenespeed is offline  
Quote Quick Reply Share with Facebook
post #6 of 6 Old 10-27-2014
al brazzi
 
Join Date: Oct 2014
Location: Lower Chesapeake bay
Posts: 211
Thanks: 0
Thanked 12 Times in 12 Posts
Rep Power: 1
 
Re: CS36 head intake vented loop

I found my CS30 set up the same way with the loop on the intake, with what looks like a bleeder in place of the check valve on the loop. I don't know what the thought was but if you could get to it (and you can't, its behind the cabinet) you could break the siphon manually I guess, maybe after plumbing they realized it wouldn't work and replaced the check with a bleeder. In any event the safety on my head anyway is the "pump dry" lever on the head pump. I was getting some leakage but it turned out to be the Joker valve, smelly too of course.
albrazzi is offline  
Quote Quick Reply Share with Facebook
Reply

Quick Reply
Message:
Options

By choosing to post the reply above you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Register Now



In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.


User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
Vented Loop for raw water to head. hriehl1 Gear & Maintenance 11 06-26-2013 08:37 PM
Head vented loop location turbulicity Gear & Maintenance 2 04-13-2011 04:55 PM
Vented Loop rjg23 Diesel 5 08-25-2010 11:33 PM
Is a vented loop between head and tank needed? jarcher Gear & Maintenance 5 06-02-2009 10:56 AM
Head and vented loop mroskothen Gear & Maintenance 4 07-10-2003 07:38 PM

Posting Rules  
You may post new threads
You may 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 On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome