Cruisers Forum
 


Join CruisersForum Today

Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on Cruisers Forums. Advertise Here
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 10-04-2019, 15:35   #16
Registered User

Join Date: Jul 2013
Location: Dublin
Boat: Sirocco30
Posts: 5
Re: How to stop air getting into water tank

I pass a hose down the filler until it reaches the bottom of the bladder a couple of times a year and let the water run out for about 10 mins . It helps purge the tank and lines.
__________________

epatant is offline   Reply With Quote
Old 10-04-2019, 15:35   #17
Registered User
 
Franziska's Avatar

Join Date: Mar 2011
Location: Panschwitz, Germany
Boat: Woods Mira 35 Catamaran
Posts: 1,225
Re: How to stop air getting into water tank

Use a y fitting instead of the t fitting close to the tanks end of the filler. It reduces the risk of getting an unwanted U shape.
__________________

Franziska is offline   Reply With Quote
Old 13-04-2019, 15:35   #18
Registered User
 
OS2Dude's Avatar

Join Date: Nov 2014
Location: Atlanta, GA
Boat: Catalina 30
Posts: 232
Images: 5
Re: How to stop air getting into water tank

I've never used a bladder tank, so take this for what it is worth.

I would think a top fill with a smaller supply hose should let any air displaced by the filling water out. You should not get air into the tank once filled. The tanks (as I understand them) are designed to collapse by outside air pressure/gravity as the contents exit. How is the tank secured? There is nothing preventing the top/sides of the tank from fulling collapsing in place? If the tank can not collapse air will be drawn into the tank to replace the lost volume of water. Do you hear any gurgling sounds?

Why do you have to empty and manually massage the tank to remove air? Once the fill port is open it is one giant vent, unless something is acting as a seal. Even a seemingly shallow sag in the fill line can act as a P trap and cause issues. (Ask me about a shallow sag in the black water vent line when we bought our boat... )
OS2Dude is offline   Reply With Quote
Old 13-04-2019, 17:45   #19
Moderator
 
JPA Cate's Avatar

Join Date: Nov 2011
Location: aboard, cruising in Australia
Boat: Sayer 46' Solent rig sloop
Posts: 15,581
Re: How to stop air getting into water tank

If you add a vent to a bladder tank, if the boat is ever upside down, all the water will try to drain out from the vent line.

We had Vetus bladders in our first Insatiable, and there was an inlet and an outlet, and no vent line. Worked well for many years, but eventually both failed. First replaced by other bladders which failed in 2 and 3 weeks respectively, and then with s/s tanks we had made in NZ, which were in use when we sold that boat.

NO Vent line is necessary. Replace any O ring seals with new ones, lubed with silicone grease. Should not suck any air in. ...n.b., Jim uses vacuum pump grease for that.

Ann
__________________
Who scorns the calm has forgotten the storm.
JPA Cate is offline   Reply With Quote
Old 13-04-2019, 19:24   #20
Registered User

Cruisers Forum Supporter

Join Date: May 2011
Location: Miami Florida
Boat: Ellis Flybridge 28
Posts: 3,538
Re: How to stop air getting into water tank

Quote:
Originally Posted by hd002e View Post
How does one go about doing that? Do I have to make another hole in the bladder?
Add a vent. Yes you have to cut a new hole in the tank. Itís not hard. Getting the inner flange through the hole can be a struggle but it is doable.

This is the fitting you need.
https://www.imtra.com/4387bc6a-82f5-...nks-detail.htm
__________________
Retired from Hopkins-Carter Marine Supplies
HopCar is offline   Reply With Quote
Old 13-04-2019, 19:28   #21
Registered User

Cruisers Forum Supporter

Join Date: May 2011
Location: Miami Florida
Boat: Ellis Flybridge 28
Posts: 3,538
Re: How to stop air getting into water tank

When you get tired of messing with the bladder tank, order a plastic tank from Ronco. Avoid aluminum tanks. Stainless is ok but plastic is cheaper and will outlast the boat.
https://ronco-plastics.com/
__________________

__________________
Retired from Hopkins-Carter Marine Supplies
HopCar is offline   Reply With Quote
Reply

Tags
water

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
Engine STOP button won't stop diesel engine SailingDownhill Marine Electronics 28 29-10-2016 08:24
stop H2O getting into VHF handheld ( Voyager ) Scare_Rab Marine Electronics 1 20-06-2014 14:35
Isotherm Freezer - Run, Stop, Run, Stop... Cruisin Cat Electrical: Batteries, Generators & Solar 8 24-04-2014 18:06
Troubleshooting air getting into fresh water pump? sgtPluck Plumbing Systems and Fixtures 7 16-05-2013 09:56
What islands to stop at and what islands not to stop at that is the question?Carib- Ram Atlantic & the Caribbean 11 21-05-2012 17:57



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 08:09.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.