Replacing Head Plumbing - Page 2 - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > General Interest Forums > Gear & Maintenance
 Not a Member? 


Like Tree1Likes
Reply
 
LinkBack Thread Tools
  #11  
Old 11-13-2013
pdqaltair's Avatar
Senior Member
 
Join Date: Nov 2008
Location: Deale, MD
Posts: 1,940
Thanks: 1
Thanked 12 Times in 12 Posts
Rep Power: 6
pdqaltair is on a distinguished road
Re: Replacing Head Plumbing

Quote:
Originally Posted by eherlihy View Post
... The trick when connecting PVC pipe to flexible hose is to use off the shelf PVC fittings WITH (and this tid-bit is worth $$$) the Sealand 307341513 Custom Hose Adapter and double hose clamps.

This is a non-ribbed barb adapter which allows for 1˝ PVC fittings to be used with 1˝ flexible hose. These sell for about $3.50 each, and they are worth every cent.
My understanding (based upon my boat and manufacturer specs) is that the smooth fittings are for those who intend to use white sanitation hose, which in the opinion of most, is a mistake. Standard 1 1/2" barbed fittings are more suitable for Trident and Rartitan hoses and will hold more pressure. I believe using a smooth fitting on a below water line through hull does not meet code. Hose clamps are most effective when they can rest between barbs and smooth fittings lack these. I've installed all types of hose on both smooth and barbed fittings.
__________________
(when asked how he reached the starting holds on a difficult rock climbing problem that clearly favored taller climbers - he was perhaps 5'5")

"Well, I just climb up to them."

by Joe Brown, English rock climber




To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
  #12  
Old 11-14-2013
Junior Member
 
Join Date: Apr 2010
Posts: 6
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
AndersD is on a distinguished road
Re: Replacing Head Plumbing

Wow a lot of great info. Seems to be a popular topic, but I've realized being a boat owner means becoming (if reluctantly) a sanitation expert, among other things.

Boatpoker, you mentioned you used ABS, which seems to be more common here in Canada. I'm assuming there is really not much difference in performance between sanitation grade rigid ABS and the schedule 80 PVC (Schedule 40 seems to be thinner). Any advantages/disadvantages I'm not aware of? I'm assuming I could find PVC but might have to hunt for it as the local hardware stores seem to only stock the thinner stuff for vacuum tubing.

Another thing is I'm planning on getting a new holding tank from Beneteau and will have them install the ports for fittings. Was thinking of upsizing the stock vent port from 5/8 to 1".. will have to also replace the thru hull in the side of the boat for the larger opening, which I'm a bit wary of, but its above the waterline and from what I've read a larger vent is the way to go (not a lot of option for cross ventilation on my boat). Anyone have any experience with doing this or advice on whether this is worth the hassle?
Reply With Quote Share with Facebook
  #13  
Old 11-14-2013
asdf38's Avatar
Senior Member
 
Join Date: Jul 2010
Posts: 630
Thanks: 1
Thanked 3 Times in 3 Posts
Rep Power: 4
asdf38 is on a distinguished road
Re: Replacing Head Plumbing

Quote:
Originally Posted by pdqaltair View Post
My understanding (based upon my boat and manufacturer specs) is that the smooth fittings are for those who intend to use white sanitation hose, which in the opinion of most, is a mistake. Standard 1 1/2" barbed fittings are more suitable for Trident and Rartitan hoses and will hold more pressure. I believe using a smooth fitting on a below water line through hull does not meet code. Hose clamps are most effective when they can rest between barbs and smooth fittings lack these. I've installed all types of hose on both smooth and barbed fittings.
What do you mean when you say white versus black? I don't think there is a distinction to be made based on color alone - Trident Sani Shield comes in both...
__________________
1979 Contessa 26
Boston, Ma
Reply With Quote Share with Facebook
  #14  
Old 11-14-2013
Senior Member
 
Join Date: Aug 2013
Location: Sweden
Posts: 101
Thanks: 2
Thanked 5 Times in 5 Posts
Rep Power: 1
Jaramaz is on a distinguished road
Re: Replacing Head Plumbing

Oh, what a lovely subject!

I would hesitate to use plastic fittings, ABS in particular. ABS becomes brittle with time.

There has not been many comments on removeing the Y-valve. OK, understand that you do not intend to use it for emptying the holding tank. But you could have some use for it in and emergency or service. Holding tank problems are not very tempting!

/J
Reply With Quote Share with Facebook
  #15  
Old 11-14-2013
Junior Member
 
Join Date: Apr 2010
Posts: 6
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
AndersD is on a distinguished road
Re: Replacing Head Plumbing

Hi Jaramaz,

I currently have two ways to discharge (IF for some "emergency" reason I had to..), direct from the head, bypassing the holding tank (courtesy of Y-valve), or from the tank using the macerator. My plan would be just to hook the macerator line right to the discharge thru hull and forget about having a direct from the head discharge option.
Reply With Quote Share with Facebook
  #16  
Old 11-14-2013
eherlihy's Avatar
Will work to sail. :-)
 
Join Date: Jan 2007
Location: Boston Area
Posts: 3,167
Thanks: 71
Thanked 41 Times in 40 Posts
Rep Power: 8
eherlihy will become famous soon enough
Re: Replacing Head Plumbing

Quote:
Originally Posted by pdqaltair View Post
My understanding (based upon my boat and manufacturer specs) is that the smooth fittings are for those who intend to use white sanitation hose, which in the opinion of most, is a mistake. Standard 1 1/2" barbed fittings are more suitable for Trident and Rartitan hoses and will hold more pressure. I believe using a smooth fitting on a below water line through hull does not meet code. Hose clamps are most effective when they can rest between barbs and smooth fittings lack these. I've installed all types of hose on both smooth and barbed fittings.
The fittings don't care what color hose they are used with. Trident 101 & 102 are smooth on both the inside diameter and outside diameter, similar to the Dometic flexible PVC.



But, by all means; use barbed fittings if you wish, and if you can find them for 1˝" fittings... Knock yourself out... Also feel free to hire me if you need help...

FWIW - I have not used these for through hull water connections below the waterline, but I have used them extensively with my VacuFlush system.
__________________

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

USCG Licensed OUPV Captain, ASA 101/103/104/105 Certified Instructor - Also certified in Recreational Marine Electrical Systems
Reply With Quote Share with Facebook
  #17  
Old 11-14-2013
Senior Member
 
Join Date: Jan 2011
Posts: 261
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 4
captflood is on a distinguished road
Re: Replacing Head Plumbing

GREETINGS EARTHLINGS ; When you have factored in how much pipe you need and have positioned it into place, are about to fix it to the reciver remember to warm both the pipe and the part it's going to fit on too, have some washing up liquid. (gloves to stop the heat tranfer to your hands) AS ALWAYS GO SAFE
Reply With Quote Share with Facebook
  #18  
Old 11-14-2013
mitiempo's Avatar
Senior Member
 
Join Date: Sep 2008
Location: Victoria B.C. Canada
Posts: 6,758
Thanks: 0
Thanked 49 Times in 40 Posts
Rep Power: 6
mitiempo will become famous soon enough
Re: Replacing Head Plumbing

One common cause of head hoses permeating is the way they are run. The vents are in the holding tank to create an aerobic (oxygen rich) atmosphere. This will not smell, just as the open sewage treatment tanks do not smell. If the atmosphere is anaerobic (without oxygen) it will stink. Hoses from the head should go uphill and then the drop into the tank should be vertical if possible to prevent standing waste in the hose. Too many installations have long, often too long horizontal hose runs and a slight dip will create a "P" trap in the hose where waste can sit. There should be 2 vents, one each side of the boat for crossflow ventilation if possible, and of sufficient size.

Many stop flushing just after the bowl is empty - the hose should always be cleared of waste.


Y valves can and should be eliminated wherever possible. Each Y valve adds 3 connections that can leak and complicate the plumbing runs. They also add some restriction - the 1 1/2" hose becomes 1 1/4" through the valve. If everything goes into the holding tank the tank contents will have less of a chance to solidify as in a seldom used tank. The deck pumpout should be with a dip tube (Sealand makes universal dip tubes) and the overboard run from a separate tank connection through the macerator to the seacock. Simple is always better.
__________________
Brian
Living aboard in Victoria Harbour

Last edited by mitiempo; 11-14-2013 at 11:52 PM.
Reply With Quote Share with Facebook
  #19  
Old 11-22-2013
Senior Member
 
Join Date: Nov 2008
Posts: 127
Thanks: 1
Thanked 2 Times in 2 Posts
Rep Power: 6
VallelyJ is on a distinguished road
Re: Replacing Head Plumbing

Haven't read all the replies so this may be redundant, but don't use hardware store 1.5 inch barbed fittings. They are too large for the standard white sanitary hose. You'll go nuts trying to fit them and you won't get a good connection. Get the barb-less fittings that marine stores sell and use 2 hose clamps.
John V.
Reply With Quote Share with Facebook
  #20  
Old 11-22-2013
pdqaltair's Avatar
Senior Member
 
Join Date: Nov 2008
Location: Deale, MD
Posts: 1,940
Thanks: 1
Thanked 12 Times in 12 Posts
Rep Power: 6
pdqaltair is on a distinguished road
Re: Replacing Head Plumbing

Quote:
Originally Posted by asdf38 View Post
What do you mean when you say white versus black? I don't think there is a distinction to be made based on color alone - Trident Sani Shield comes in both...
That was sloppy writing on my part.

I was implying that "white" hose was the common white vinyl sanitation hose (Shields 148 and similar). Trident 101/102 are the same hose in different colors. This product is in NO WAY similar to white vinyl hoses, having spent years working with both.
__________________
(when asked how he reached the starting holds on a difficult rock climbing problem that clearly favored taller climbers - he was perhaps 5'5")

"Well, I just climb up to them."

by Joe Brown, English rock climber




To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
Reply

Tags
beneteau 331 , head , hoses , plumbing , sanitary


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Replacing exhaust elbow and plumbing on Universal M12 Joel73 Diesel 1 08-18-2013 08:34 AM
Marine Head plumbing Dan Burke Gear & Maintenance 9 04-17-2012 11:24 PM
Head plumbing according to regulations Petar Gear & Maintenance 6 12-28-2010 01:03 AM
Head Plumbing mwrohde Gear & Maintenance 7 06-13-2008 03:22 PM
Head Plumbing Stormer_2003 Gear & Maintenance 2 10-24-2004 07:51 PM


All times are GMT -4. The time now is 10:35 PM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012