Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 25-04-2014, 10:46   #1
Registered User
 
Dreaming Yachtsman's Avatar

Join Date: Nov 2005
Location: Kennewick, WA
Posts: 490
Images: 5
Send a message via Skype™ to Dreaming Yachtsman
Need 60 mm Sanitary Discharge Hose

After 10 years, the 60 mm ID hose from our holding tanks to hull discharge valves needs to be replaced. I am having great difficulty finding a source for such hose. Yesterday, expecting to find such hose on a French island, we checked every chandlery on Martinique without success. Does anyone know where I can get such hose?

I have read elsewhere on this forum that plumbing PVC pipe in place of hose is not a good idea because of hull flexing.
__________________

__________________
John
Formerly S/V Yachtsman's Dream
Go sailing now. Life is too short not to enjoy it.
Dreaming Yachtsman is offline   Reply With Quote
Old 25-04-2014, 13:46   #2
Registered User

Join Date: Dec 2008
Location: Oriental, NC
Boat: Mainship Pilot 34
Posts: 1,429
Re: Need 60 mm Sanitary Discharge Hose

60 mm is about 2-3/8". Standard sanitation hose on US recreational boats is 1-1/2". Can you find/make an adapter so you can use 1-1/2". It will also be easier to bend and route.

David
__________________

__________________
djmarchand is offline   Reply With Quote
Old 25-04-2014, 14:08   #3
Moderator Emeritus
 
David M's Avatar

Cruisers Forum Supporter

Join Date: Sep 2007
Location: San Francisco Bay
Boat: research vessel
Posts: 10,152
Re: Need 60 mm Sanitary Discharge Hose

60 millimeters converts to 2.36 inches.

Try this adapter, it steps down from 60mm to 38mm which equals 1 1/2 inches which is standard for US sized sanitation hose.
Plastic hose adapter, 30 - 60 mm - Accessories - Waste water systems

You don't want to use PVC pipe for your sanitation system. It can become brittle and crack and odor can permeate it.
__________________
David

Life begins where land ends.
David M is offline   Reply With Quote
Old 25-04-2014, 14:14   #4
Moderator
 
a64pilot's Avatar

Cruisers Forum Supporter

Join Date: Oct 2013
Location: Albany Ga.
Boat: Island Packet 38
Posts: 17,072
Re: Need 60 mm Sanitary Discharge Hose

I've heard from several the PVC was the way to go, it never permeates when used in houses, and if not in sunlight, lasts I don't know how long actually, but quite a long time. House I live in a lot of the PVC plumbing is form the early 70's and it's still good.
Now if you hull flexes more than PVC can, I'd be afraid, very afraid
__________________
a64pilot is online now   Reply With Quote
Old 25-04-2014, 14:21   #5
Moderator Emeritus
 
David M's Avatar

Cruisers Forum Supporter

Join Date: Sep 2007
Location: San Francisco Bay
Boat: research vessel
Posts: 10,152
Re: Need 60 mm Sanitary Discharge Hose

The problem with PVC is that it is not very strong and can be brittle. It is possible to break it while climbing around in the bilge areas. Hose is not brittle and can be stepped on and pressed against with much less worry about popping it loose and sinking the boat or dumping pee and poop all over the bilge.

Yeah its cheap, but is it worth the additional risk in order to save money? I don't think so but many disagree.
__________________
David

Life begins where land ends.
David M is offline   Reply With Quote
Old 25-04-2014, 14:28   #6
Moderator
 
a64pilot's Avatar

Cruisers Forum Supporter

Join Date: Oct 2013
Location: Albany Ga.
Boat: Island Packet 38
Posts: 17,072
Re: Need 60 mm Sanitary Discharge Hose

It's not a money thing, I was under the impression that you did PVC once, yes it's a PIA to do, but once done, it lasted forever. I know in my boat, there is no worry about stepping on any of the hose, seems most of it runs against the hull above and away from the bilges. it's the inaccessibility that stops me from trying PVC. I'm not looking forward to replacing the hose either, looks to be a difficult job, but needs doing, pretty sure my hose is original, from 1987. Looks like black steam hose, stiff and thick.
__________________
a64pilot is online now   Reply With Quote
Old 25-04-2014, 14:30   #7
Moderator
 
a64pilot's Avatar

Cruisers Forum Supporter

Join Date: Oct 2013
Location: Albany Ga.
Boat: Island Packet 38
Posts: 17,072
Re: Need 60 mm Sanitary Discharge Hose

Schedule 40 1.5" PVC is strong, bet you could use if for a baseball bat, it's that strong
__________________
a64pilot is online now   Reply With Quote
Old 25-04-2014, 14:31   #8
Moderator
 
a64pilot's Avatar

Cruisers Forum Supporter

Join Date: Oct 2013
Location: Albany Ga.
Boat: Island Packet 38
Posts: 17,072
Re: Need 60 mm Sanitary Discharge Hose

Wonder what Peggies opinion of PVC is?
__________________
a64pilot is online now   Reply With Quote
Old 25-04-2014, 14:34   #9
Registered User

Join Date: Feb 2009
Posts: 1,849
Re: Need 60 mm Sanitary Discharge Hose

if you have straight runs PVC is definitely the way to go. No question
__________________
motion30 is offline   Reply With Quote
Old 25-04-2014, 17:15   #10
Registered User

Join Date: Oct 2010
Location: Australia
Boat: TBA
Posts: 295
Re: Need 60 mm Sanitary Discharge Hose

i have used pvc but high pressure and one that is used for heat (this gives a much thicker wall ) it is strong and in a position it can vibrate or flex you either make a loop or use a short flexible pipe to connect, it seems ok after 6 years it comes with many of the bends and fittings you will need, look at hot tub or swimming pool trade suppliers and make up your own mind.(these products are also used in RV's etc)
__________________
aclmck is offline   Reply With Quote
Old 25-04-2014, 17:44   #11
Registered User
 
Cotemar's Avatar

Join Date: Dec 2007
Boat: FP, Helia 44 Evo
Posts: 5,717
Re: Need 60 mm Sanitary Discharge Hose

Maybe this will help you with hose or PVC pipe.

Sewage Hose or PVC Pipe ?
__________________
Cotemar is offline   Reply With Quote
Old 26-04-2014, 09:40   #12
Registered User
 
Dreaming Yachtsman's Avatar

Join Date: Nov 2005
Location: Kennewick, WA
Posts: 490
Images: 5
Send a message via Skype™ to Dreaming Yachtsman
Re: Need 60 mm Sanitary Discharge Hose

Thanks for all the inputs so far. Since this discussion has drifted towards PVC vs. hose, discussed at length in a multitude of other threads, I'll try to steer it back to the primary issue: availability of 60 mm ID hose.

We have considered PVC but have not been able to find that size pipe here in Martinique. Having read most of the other discussions on CF about PVC vs. hose (one of which Cotemar referenced, thank you), I conclude that there are many boats out there successfully flushing waste through pipes in spite of the warnings about flexing. Many of those discussions recommend at least a short piece of hose to allow for movement, which brings us back to our original problem of finding hose.

Our holding tanks are wedge shaped, hold about 8 gallons each, and are mounted to the bulkheads above the toilets for gravity drainage. The starboard tank has about 1 foot of hose connecting the tank drain fitting to PVC piping which then runs to the overboard hull valve. Existing misalignment between the drain fitting and the piping makes PVC for that tank a very remote possibility and would require seriously modifying existing piping.

The port tank has about a 4 foot run from the tank drain directly to the dump valve through an S shape, which would require some imaginative fitting placements. That hose desperately needs to be replaced because the outer covering is bubbling and the end connected to the tank leaks waste onto the toilet cover, which annoys the wife.

Speculating here, but I believe that one reason for such large hose is to get rapid flow out of the tank for good drainage. Therefore introducing a restriction into that line in the form of a reducer as djmarchand and David M (one chandlery here showed us the Vetus reducer you linked to) suggested doesn't seem like a good idea to me.

Still looking for hose.
__________________
John
Formerly S/V Yachtsman's Dream
Go sailing now. Life is too short not to enjoy it.
Dreaming Yachtsman is offline   Reply With Quote
Old 26-04-2014, 11:12   #13
Registered User
 
Cotemar's Avatar

Join Date: Dec 2007
Boat: FP, Helia 44 Evo
Posts: 5,717
Re: Need 60 mm Sanitary Discharge Hose

Dreaming Yachtsman,
Your over thinking this issue to much. All newer FP boats use 1.5 inch sanitation hose.
YOU DO NOT NEED 60 mm or 2.36 inch hose.
Buy reducers and install 1.5 inch hose like all the other 99.9999% of boats and you will be all good.
__________________
Cotemar is offline   Reply With Quote
Old 26-04-2014, 12:20   #14
Registered User

Join Date: Dec 2005
Location: WNA
Boat: Dufour 35
Posts: 3,250
Re: Need 60 mm Sanitary Discharge Hose

Dreaming Yachtsman

60 mm ID is not that common. Nearest common size is 63mm = 2 1/2"

Standard hydraulic suction/return hoses, manufactured to SAE 100 R4 , are available in 60 ID, however.

See if you can find a shop that makes hydraulic hoses for heavy construction equipment, and ask them. They should be able to help you.
I can't tell ypu how long it will take before such a hose will start to smell.....but it's strong enough.

To see what I'm talking about search this file http://www.hydroscand.co.uk/MediaBin...eDownload=true

for a hose called 1438-00-39 .

Thomas
__________________
cagney is offline   Reply With Quote
Old 27-04-2014, 14:41   #15
Registered User

Join Date: Jun 2007
Location: SW Florida
Boat: FP Belize, 43' - Dot Dun
Posts: 3,433
Re: Need 60 mm Sanitary Discharge Hose

I replaced mine:

http://www.sofomarin.com/catalogue.php

page 49 in their catalog

I wouldn't go to 1.5" unless it's the only thing I could find. Too many problems gravity draining with 1.5".
__________________

__________________
DotDun 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
Disposing of sanitary napkin playfair1965 Liveaboard's Forum 12 24-07-2012 15:25
Hydraulic Hose - Copper Tube versus Hose AllezCat Construction, Maintenance & Refit 42 14-04-2012 22:14
Forty Year-Old Aeroquip-Style Screw on Hose Ends Work on New Hose sdowney717 Engines and Propulsion Systems 0 10-11-2011 09:14
PVC piping in marine sanitary exhaust skipgundlach Plumbing Systems and Fixtures 8 09-08-2007 14:29
US hose on metric hose barb coot Construction, Maintenance & Refit 5 04-03-2006 20:22



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 08:36.


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.