Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 20-03-2018, 06:47   #1
Registered User
 
Kamalolo's Avatar

Join Date: Jun 2017
Posts: 42
What is this called.....

Trying to replace the white cap thing......we think it has to do with the toilet smell inside the boat.....seems to be an exhaust or something to a toilet line..

(I'm completely clueless to the terms lol)

Or any other ideas to why it smells when we pump toilet to black water tank and seems to come from the general area of what's pictured......
Click image for larger version

Name:	20180320_084209.jpg
Views:	261
Size:	41.7 KB
ID:	166713Click image for larger version

Name:	20180320_084214.jpg
Views:	320
Size:	74.2 KB
ID:	166714
__________________

Kamalolo is offline   Reply With Quote
Old 20-03-2018, 07:02   #2
Registered User
 
Alan Mighty's Avatar

Join Date: Mar 2014
Location: Scarborough Boat Harbour, Moreton Bay
Boat: US$4,550 of lead under a GRP hull with cutter rig
Posts: 1,045
Re: What is this called.....

Lots a lot like a Scot Marine vacuum breaker (or siphon breaker).

See; SCOT DIVISON OF ARDOX - -VB38 SCOT VACUUM BREAKER 3/8" FPT | MMIMarine.com

Is that not what the label reads?
__________________

__________________
“Fools say that you can only gain experience at your own expense, but I have always contrived to gain my experience at the expense of others.” - Otto von Bismarck
Alan Mighty is offline   Reply With Quote
Old 20-03-2018, 07:18   #3
Registered User
 
Alan Mighty's Avatar

Join Date: Mar 2014
Location: Scarborough Boat Harbour, Moreton Bay
Boat: US$4,550 of lead under a GRP hull with cutter rig
Posts: 1,045
Re: What is this called.....

Your Scot Marine vacuum breaker needs annual testing and cleaning.

Two parts.

Uppermost is a nylon perforated cover. It houses a blue poppet and a stainless steel spring.

Below that is a second nylon fitting, that is attached to your sewage line.

The stainless steel spring, above the poppet in the perforated cover, holds the poppet closed.

Test by removing the breaker (don't round the nylon hexagon) and attempt to blow air through the hexagon end. No air should escape. If you blow through the perforated cover end, air should pass through easily.

Lime scale and crap can block the poppet. Clean: Soak in warm freshwater. Add vinegar to the water if necessary to remove lime scale.

Do not try to pry the blue poppet from the perforated cover.
__________________
“Fools say that you can only gain experience at your own expense, but I have always contrived to gain my experience at the expense of others.” - Otto von Bismarck
Alan Mighty is offline   Reply With Quote
Old 20-03-2018, 07:29   #4
Registered User
 
Alan Mighty's Avatar

Join Date: Mar 2014
Location: Scarborough Boat Harbour, Moreton Bay
Boat: US$4,550 of lead under a GRP hull with cutter rig
Posts: 1,045
Re: What is this called.....

Once you've cleaned and tested your Scot Marine vacuum breaker, message a moderator and ask them to move this thread to Engineering & Systems/Plumbing. That's where it belongs, not in Our Community.
__________________
“Fools say that you can only gain experience at your own expense, but I have always contrived to gain my experience at the expense of others.” - Otto von Bismarck
Alan Mighty is offline   Reply With Quote
Old 20-03-2018, 07:38   #5
Registered User
 
Alan Mighty's Avatar

Join Date: Mar 2014
Location: Scarborough Boat Harbour, Moreton Bay
Boat: US$4,550 of lead under a GRP hull with cutter rig
Posts: 1,045
Re: What is this called.....

The original manufacturer is the Scot Pump Division of Ardox.

They also make stainless steel loops on which the vacuum breaker can be mounted, making a "vented loop".

You should be able to see the vented loops in the bottom right hand corner of this page on their website: http://scotpump.com/#marketmarine

You should be able to buy a new vacuum breaker (check the size, I think they made at least two sizes) for many marine supply stores (not just MMIMarine.com). You'll find some variation in prices.

Here's another retailer: Boatswain's Locker - Scot Vented Loops and Parts
__________________
“Fools say that you can only gain experience at your own expense, but I have always contrived to gain my experience at the expense of others.” - Otto von Bismarck
Alan Mighty is offline   Reply With Quote
Old 20-03-2018, 07:44   #6
Registered User
 
Alan Mighty's Avatar

Join Date: Mar 2014
Location: Scarborough Boat Harbour, Moreton Bay
Boat: US$4,550 of lead under a GRP hull with cutter rig
Posts: 1,045
Re: What is this called.....

The odour to which you refer is just a cocktail of chemicals, dominated probably by two: indole, and skatole. If you speak Greek, you'll understand the significance of the name of the latter chemical.

Human brains are wired to detect those two chemicals in relatively low concentrations. Got a lot of social significance.
__________________
“Fools say that you can only gain experience at your own expense, but I have always contrived to gain my experience at the expense of others.” - Otto von Bismarck
Alan Mighty is offline   Reply With Quote
Old 20-03-2018, 08:25   #7
Registered User
 
Alan Mighty's Avatar

Join Date: Mar 2014
Location: Scarborough Boat Harbour, Moreton Bay
Boat: US$4,550 of lead under a GRP hull with cutter rig
Posts: 1,045
Re: What is this called.....

Looks like I was in error when I wrote that Scot Marine vacuum breaker was made of nylon.

Anti-Siphon Loop for Raw Water Exhaust reckons it is made of Delrin, a high molecular weight polyoxymethylene.

Sorry about misleading you.

Your vacuum breaker might only have one part (not two) of Delrin. You may have only the perforated cover, which screws directly onto some fitting, instead of having a second piece of Delrin below it.
__________________
“Fools say that you can only gain experience at your own expense, but I have always contrived to gain my experience at the expense of others.” - Otto von Bismarck
Alan Mighty is offline   Reply With Quote
Old 20-03-2018, 08:59   #8
Registered User
 
Davidhoy's Avatar

Join Date: Jul 2016
Location: Fort Lauderdale
Boat: Morgan 462
Posts: 798
Re: What is this called.....

Quote:
Originally Posted by Kamalolo View Post
Or any other ideas to why it smells when we pump toilet to black water tank and seems to come from the general area of what's pictured......
Often the odor comes not so much from #1 or #2, but from the supply water. If you're flushing with sea water, the intake water in the supply line sits stagnant for a while between flushed. Micro-organisms in the water die and decay, resulting in odor when that water is drawn into the bowl. If you're using the head regularly this should not be that significant of an issue.

-David
__________________
Twenty years from now you will be more disappointed by the things that you didn't do than by the ones you did do. So throw off the bowlines. Sail away from the safe harbor. Catch the trade winds in your sails. Explore. Dream. Discover.” – Mark Twain
Davidhoy is offline   Reply With Quote
Old 20-03-2018, 09:27   #9
Registered User

Join Date: Nov 2014
Location: Falmouth, UK
Posts: 197
Re: What is this called.....

Does the word in white letters on the blue pipe really say what I think it might...
wiekeith is offline   Reply With Quote
Old 20-03-2018, 09:29   #10
Registered User
 
Privilege's Avatar

Join Date: Oct 2009
Location: Bermuda
Boat: Privilege 435
Posts: 485
Images: 12
Re: What is this called.....

The issue might not be your vented loop but rather your hose. It looks as though you have black exhaust hose for your toilet flush? The smell will permeate through the hose. To find out if this is the case, wet a rag or towel with hot water and wrap it around the hose. After a few minutes when it has cooled, unwrap it and take it outside. If you can smell the smell on the rag, your hose is the problem.
Privilege is offline   Reply With Quote
Old 20-03-2018, 10:29   #11
Registered User

Join Date: Nov 2013
Posts: 29
Re: What is this called.....

Agree with Davidhoy. Odor just like black water, but actually from saltwater intake and hose to toilet. White vinegar immersion will stop this pretty quick, and if you can find a way to clear your thru-hull, more's the better. Try it before disassembling everything. And be advised... vinegar is magic. In colonial days it was the antiseptic of choice and effectively so.
gwbull is offline   Reply With Quote
Old 20-03-2018, 10:43   #12
Registered User

Join Date: Dec 2012
Boat: Jeanneau SO45.2
Posts: 155
Re: What is this called.....

Quote:
Originally Posted by wiekeith View Post
Does the word in white letters on the blue pipe really say what I think it might...
guess so... the SHIelds has hit the fan
Redline452 is offline   Reply With Quote
Old 20-03-2018, 13:27   #13
Registered User
 
Kamalolo's Avatar

Join Date: Jun 2017
Posts: 42
Re: What is this called.....

Quote:
Originally Posted by wiekeith View Post
Does the word in white letters on the blue pipe really say what I think it might...
Kamalolo is offline   Reply With Quote
Old 20-03-2018, 13:30   #14
Registered User
 
Kamalolo's Avatar

Join Date: Jun 2017
Posts: 42
Re: What is this called.....

Quote:
Originally Posted by Alan Mighty View Post
Lots a lot like a Scot Marine vacuum breaker (or siphon breaker).

See; SCOT DIVISON OF ARDOX - -VB38 SCOT VACUUM BREAKER 3/8" FPT | MMIMarine.com

Is that not what the label reads?
I believe your right....don't mind the price either. Thank you
Kamalolo is offline   Reply With Quote
Old 20-03-2018, 13:45   #15
Registered User
 
Kamalolo's Avatar

Join Date: Jun 2017
Posts: 42
Re: What is this called.....

Quote:
Originally Posted by Alan Mighty View Post
The original manufacturer is the Scot Pump Division of Ardox.

They also make stainless steel loops on which the vacuum breaker can be mounted, making a "vented loop".

You should be able to see the vented loops in the bottom right hand corner of this page on their website: http://scotpump.com/#marketmarine

You should be able to buy a new vacuum breaker (check the size, I think they made at least two sizes) for many marine supply stores (not just MMIMarine.com). You'll find some variation in prices.

Here's another retailer: Boatswain's Locker - Scot Vented Loops and Parts
🖒 thanks for ur knowledge
__________________

Kamalolo is offline   Reply With Quote
Reply

Tags
cal

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 is a Boat Called a She ??? frankdeegan General Sailing Forum 34 24-05-2011 23:53
Is it called a Kedge? Exocet The Sailor's Confessional 10 28-02-2009 09:07
I know it's CALLED a trampoline but... schoonerdog Multihull Sailboats 9 01-09-2008 11:58



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 04:45.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.