Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 21-03-2011, 10:48   #1
Registered User

Join Date: Nov 2010
Location: Jensen Beach. Fl
Boat: 1982 T-37 Tayana
Posts: 3
Clogged Holding Tank Vent Hose

Any suggestions on how to clear a holding tank vent hose. Unfortuantely my tank is in the keel of the boat and not accessable so I cannot pull the vent hose to clear.

I am leary of putting chemical treaments in the hose because it's made of rubber. It's a 1/2" hose.

I have tried vinigar and baking soda to no avail.

Any advice would be much appreciated to my stinking problem.

Jeff
'Gabrielle'
Tayana 37
__________________

__________________
Gabrielle37 is offline   Reply With Quote
Old 21-03-2011, 10:55   #2
Moderator
 
cabo_sailor's Avatar

Cruisers Forum Supporter

Join Date: Mar 2008
Location: Tarpon Springs FL
Boat: Cabo Rico 38
Posts: 1,905
Re: Clogged Holding Tank vent hose

If you can get access to the hose at the vent, you might try putting a hose barb on a garden hose. Use that to connect to the vent hose and reverse flush it. Careful, you don't want to flush more water into your holding tank than it can hold. I've used the method with the vent hose to my water tank and to clear through hull hoses.

Rich
__________________

__________________
cabo_sailor is offline   Reply With Quote
Old 21-03-2011, 11:00   #3
Moderator Emeritus
 
GordMay's Avatar

Join Date: Mar 2003
Location: Thunder Bay, Ontario - 48-29N x 89-20W
Boat: (Cruiser Living On Dirt)
Posts: 31,577
Images: 240
Re: Clogged Holding Tank vent hose

Greetings and welcome aboard the CF,Gabrielle37.

Backflush, with higher pressure water, from the vent fitting.

Check out one of our earlier conversations on this subject
How to Clear Blocked Holding Tank Vent ?
__________________
Gord May
"If you didn't have the time or money to do it right in the first place, when will you get the time/$ to fix it?"



GordMay is offline   Reply With Quote
Old 21-03-2011, 11:02   #4
Senior Cruiser
 
Therapy's Avatar

Cruisers Forum Supporter

Join Date: Jul 2007
Location: W Florida
Boat: The Jon boat still, plus a 2007 SeaCat.
Posts: 6,894
Images: 4
Re: Clogged Holding Tank vent hose

1 empty the holding tank.
2 leave the cap off the tank suction line/deck fitting.
3 use a hose to blow water into the tank through the vent line.

This is what I did to make sure my vent line was not clogged.

PS. If you have a filter of some sort in the line this will probably not work. The filter would probably be the clog.

PPS. This thread may help.
Holding Tank Vent
__________________
Therapy is offline   Reply With Quote
Old 21-03-2011, 11:19   #5
Marine Service Provider
 
peghall's Avatar

Community Sponsor
Cruisers Forum Supporter

Join Date: Feb 2011
Posts: 1,533
Re: Clogged Holding Tank vent hose

The most common location for a tank vent blockage, especially in the spring when the mud daubers are building nests in any cavity they can find, is the vent thru-hull. So before you backflush the vent, use a screwdriver blade or whatever you have handy that'll work to scrape out the thru-hull. If there's a screen in it, knock it out...screens cause more problems than they prevent.

The second most common location on a sailboat is the connection to the tank--both that end of the vent line and the tank vent fitting--'cuz waste spills into the vent when the boat heels and builds up to a clog. From what you're saying about access, cleaning that out could be a problem.

A vent line filter is another possibility. If it ever gets wet, it'll block your vent line...which a big reason--along with their exhorbitant cost and short (only about a year) lifespan even if they don't get wet--why vent line filters are an even worse choice for a sailboat than they are for a powerboat. If you have one, it'll have to come out to flush out the line...up to you whether to replace it. I wouldn't.

It might be necessary--and a good idea even if it's not--to replace the vent thru-hull with an open bulkhead or "mushroom" thru-hull fitting. That makes backflushing it SOOO much easier!!

Once you get it clear, you want to keep it clear...backflushing it every time you wash the boat and/or pump out is the way to do that.

Meanwhile, do not use the toilet again or attemp to pump out till you've cleared the vent.
__________________
2017 Peggie Hall
Specializing in marine sanitation since 1987
Author "The NEW Get Rid of Boat Odors"
https://www.amazon.com/New-Get-Rid-B...dp/1892399784/
peghall is offline   Reply With Quote
Old 21-03-2011, 11:27   #6
Registered User
 
Cormorant's Avatar

Join Date: Jan 2009
Location: Catskill Mountains when not cruising
Boat: 31' homebuilt Michalak-designed Cormorant "Sea Fever"
Posts: 2,072
Re: Clogged Holding Tank vent hose

We keep a little piece of window screen glued over our vent through-hull to prevent mud daubers and other bugs from taking up residence.

Good luck with clearing the line. Back flushing should work, but if it doesn't, you could always try snaking a piece of weed whacker line down in there.
__________________
Cormorant is online now   Reply With Quote
Old 05-06-2014, 18:19   #7
Registered User

Join Date: Dec 2007
Location: Irvine CA
Boat: Pacific Seacraft, Dana 24, 28 - Sunset
Posts: 2
Re: Clogged Holding Tank Vent Hose

My holding tank on a Pacific Seacraft 31 significantly lost capacity following a cruise where I believe we overfilled the tank. After a number of pumpouts and overboard dumps using my macerator pump, it still did not appear to fully empty. This thread was most helpful and today I had great success cleaning the vent line using a hose attachment I made from a 3/8 inch hose bib and a valve fitting from my local hardware store. Picture attached. I added some rubber tap to the bib for a good seal and the fitting fit the overboard discharge hole perfectly. I then back flushed the vent line and victory over poop.

What I feared would be a very messy job, turned out to be a 10 minute task.
Attached Thumbnails
Click image for larger version

Name:	Boat Vent flusher.jpg
Views:	387
Size:	274.2 KB
ID:	82565  
__________________
SV Sunset is offline   Reply With Quote
Old 05-06-2014, 19:30   #8
Registered User
 
Terra Nova's Avatar

Join Date: Apr 2007
Location: Marina del Rey, California
Boat: Freya 39 cutter- Terra Nova
Posts: 3,645
Re: Clogged Holding Tank Vent Hose

Quote:
Originally Posted by Gabrielle37 View Post
Any suggestions on how to clear a holding tank vent hose. Unfortuantely my tank is in the keel of the boat and not accessable so I cannot pull the vent hose to clear...
It is past time to replace this hose. Create access if necessary.
__________________
1st rule of yachting: When a collision is unavoidable, aim for something cheap.
"whatever spare parts you bring, you'll never need"--goboatingnow
"Id rather drown than have computers take over my life."--d design
Terra Nova is offline   Reply With Quote
Old 06-06-2014, 11:53   #9
Registered User

Join Date: Mar 2010
Location: Living aboard and cruising
Boat: Island Packet 40
Posts: 276
Images: 1
Re: Clogged Holding Tank Vent Hose

I second the option of looking at the vent thru-hull. Ours got caked up from years of venting the tank. We removed the vent hose at the thru-hull, cleaned it out with pipe cleaners and used a garden hose to push the rest out the vent (screen removed first). The vents are easily clogged, more easily than the hose itself.
__________________
Smooth seas never made an experienced sailor.

Bill
CaptainBW is offline   Reply With Quote
Old 06-06-2014, 12:36   #10
Registered User
 
ranger42c's Avatar

Join Date: Aug 2012
Location: Maryland, USA
Boat: 42' Sportfish
Posts: 2,984
Re: Clogged Holding Tank Vent Hose

OP's post is old, but in the interest of the archives... this is an application where compressed air might be viable too... and without adding to the contents of the holding tank itself.

-Chris
__________________
Selby Bay, South River, Chesapeake Bay, USA.
ranger42c is offline   Reply With Quote
Old 06-06-2014, 12:44   #11
Registered User
 
Terra Nova's Avatar

Join Date: Apr 2007
Location: Marina del Rey, California
Boat: Freya 39 cutter- Terra Nova
Posts: 3,645
Re: Clogged Holding Tank Vent Hose

Compressed air could make for an interesting cleanup.
__________________
1st rule of yachting: When a collision is unavoidable, aim for something cheap.
"whatever spare parts you bring, you'll never need"--goboatingnow
"Id rather drown than have computers take over my life."--d design
Terra Nova is offline   Reply With Quote
Old 07-06-2014, 12:05   #12
Registered User
 
ranger42c's Avatar

Join Date: Aug 2012
Location: Maryland, USA
Boat: 42' Sportfish
Posts: 2,984
Re: Clogged Holding Tank Vent Hose

Yep, might not be for the faint of heart.

That said, a tank already just pumped out (to the extent a clogged vent might allow)... approached with a tight-fitting nozzle for introducing a few short puffs... could conceivably work with relatively little effort.

-Chris
__________________

__________________
Selby Bay, South River, Chesapeake Bay, USA.
ranger42c is offline   Reply With Quote
Reply

Tags
holding tank

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
Holding Tank Vent US1Fountain Plumbing Systems and Fixtures 47 17-05-2011 19:43
For Sale: Holding Tank Vent-Line Filter roberttigar Classifieds Archive 0 05-08-2010 11:20
How to Clear Blocked Holding Tank Vent ? Cruisin Home Plumbing Systems and Fixtures 25 15-07-2010 09:15
Need to cut a hole in my boat (holding tank vent) rebel heart Construction, Maintenance & Refit 9 14-10-2007 20:48



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 18:45.


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.