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 14-12-2016, 17:19   #1
Registered User

Join Date: Feb 2016
Posts: 2
Restoring Fresh Water Tank

I have bought an Alajuela 33 with stainless a steel water tank in which the water has remained unused for some time (2-3 years) and is stale and malodorous. Can anyone suggest an additive that will assist in disinfecting and deodorising the tank.

Thanks,

Mervyn Mitchell
__________________

mervynmitchell is offline   Reply With Quote
Old 14-12-2016, 17:31   #2
Senior Cruiser
 
tkeithlu's Avatar

Cruisers Forum Supporter

Join Date: Feb 2012
Location: Carrabelle, Florida
Boat: Fiberglas shattering 44' steel trawler
Posts: 1,808
Re: Restoring Fresh Water Tank

Rule of thumb: Nothing survives bleach. But.... you must use is sparingly in dilute form for longer periods of time or you will damage the SS tank. You can try other disinfectants first - very little survives alcohol in greater than 12% concentration. You've also got a flushing problem - you not only want to kill the stuff, you want to get rid of the corpses. You might start with simple water flushes to reduce the load, then move to disinfectants, then move to water that is drinkable, but tastes of chlorine.
__________________

tkeithlu is offline   Reply With Quote
Old 14-12-2016, 17:37   #3
Senior Cruiser
 
tkeithlu's Avatar

Cruisers Forum Supporter

Join Date: Feb 2012
Location: Carrabelle, Florida
Boat: Fiberglas shattering 44' steel trawler
Posts: 1,808
Re: Restoring Fresh Water Tank

Another way of looking at it. Utility companies predict how much chlorine will be used up between the purification plant and your faucet, so they kill the bugs but leave you with good water for your coffee. They also flush lines that hold unused water for long periods, or which flow too slowly to pass junk through the system - you see them out there opening fire hydrants and giving slow mains a good rinsing out. If they are negligent, you get rusty water for a day or two.
tkeithlu is offline   Reply With Quote
Old 15-12-2016, 06:59   #4
Senior Cruiser
 
GordMay's Avatar

Cruisers Forum Supporter

Join Date: Mar 2003
Location: Thunder Bay, Ontario - 48-29N x 89-20W
Boat: (Cruiser Living On Dirt)
Posts: 37,552
Images: 241
Re: Restoring Fresh Water Tank

Greetings and welcome aboard the CF, Mervyn.

See ➥ http://www.practical-sailor.com/issu...k_11230-1.html
__________________
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 15-12-2016, 07:12   #5
Registered User

Join Date: Jan 2015
Location: The boat is on the hard in Indiantown and we’re back in Colorado Springs to make more money so we can go again.
Boat: 1982 Cape Dory 36 Hull #78
Posts: 606
Re: Restoring Fresh Water Tank

Hydrogen Peroxide. Bleach and stainless steel don't do well together. If you must use bleach, mix it with water before pouring it in the tank.
SSgtPitt is offline   Reply With Quote
Old 15-12-2016, 08:02   #6
Moderator
 
a64pilot's Avatar

Cruisers Forum Supporter

Join Date: Oct 2013
Location: Albany Ga.
Boat: Island Packet 38
Posts: 29,244
Re: Restoring Fresh Water Tank

Do you have an inspection port?
If so I'd remove it and get a look at what I had, I'd then start pumping water out there and flush it several times, nice to have a pump you can put into the tank for that. After flushing it out, I'd fill it with city water and possibly, maybe a small amount of chlorine bleach and let it sit at least overnight, then pump it out again and that ought to be all that is required.
I have an aluminum tank myself and am overly paranoid about chlorine so I filter all my water through a charcoal filter as I fill the tank, if I let it sit for a month or more in Summer, I need to flush it out and refill with unfiltered city water, that is enough chlorine to kill whatever is in there that makes the sulfur smell, it apparently takes very little chlorine.
Unfortunately you simply cant get a high enough concentration of Hydrogen peroxide to disinfect, I looked into it as I have that paranoia about chlorine, but I think it was gallons and gallons of hydrogen peroxide needed, way more than was realistic.
a64pilot is offline   Reply With Quote
Old 15-12-2016, 09:44   #7
Registered User

Join Date: Aug 2015
Posts: 26
Re: Restoring Fresh Water Tank

You can get 35% food grade Hydrogen peroxide. I use it to flush a hot tub. 1 pint will do for hundreds of gallons
GBonjour is offline   Reply With Quote
Old 15-12-2016, 10:08   #8
Moderator
 
a64pilot's Avatar

Cruisers Forum Supporter

Join Date: Oct 2013
Location: Albany Ga.
Boat: Island Packet 38
Posts: 29,244
Re: Restoring Fresh Water Tank

Quote:
Originally Posted by GBonjour View Post
You can get 35% food grade Hydrogen peroxide. I use it to flush a hot tub. 1 pint will do for hundreds of gallons
Not doubting you, but where, and reference for quantity needed?
I sure would like to never put chlorine into my tank ever again.
On edit, I found sources to order, now how much is required?
a64pilot is offline   Reply With Quote
Old 15-12-2016, 10:13   #9
Registered User
 
Cheechako's Avatar

Join Date: Aug 2006
Location: Skagit City, WA
Posts: 22,043
Re: Restoring Fresh Water Tank

Bleach in water, it doesn't have to be in there long and shouldn't effect the metal in that time. Rinse well.
__________________
"I spent most of my money on Booze, Broads and Boats. The rest I wasted" - Elmore Leonard











Cheechako is offline   Reply With Quote
Old 15-12-2016, 10:37   #10
Registered User

Join Date: May 2012
Location: Western Wisconsin
Boat: O’Day Daysailer II, 17'
Posts: 574
Re: Restoring Fresh Water Tank

What causes odor in drinking water tanks is trace organics that decompose with the help of bacteria and use up the oxygen in the water. The water then goes to bacteria that do not need oxygen with strong nasty odors. I would drain the tank, flush tank from a domestic water supply using potassium permanganate in the water.

https://iaspub.epa.gov/tdb/pages/tre...Id=-1644188630
Uses of potassium permanganate in water treatment plants

How to Use Potassium Permanganate in Water Treatment | LIVESTRONG.COM
How to use potassium permanganate

http://es.www.caruscorporation.com/r...et%20final.pdf
Stainless steel compatability
westwinds is offline   Reply With Quote
Old 15-12-2016, 11:26   #11
Registered User

Join Date: May 2015
Location: North Carolina
Boat: Kadey-Krogen 38 Cutter
Posts: 28
Re: Restoring Fresh Water Tank

We have had exceptional success with Puriclean & AquaMega tabs made by Clean Tabs in the UK. Puriclean is a powder specifically designed to clean stainless steel boilers and the aquamega tabs go in with each new tank of water to eliminate any bugs that may be in the water supply.

Practical Sailor gave them top ratings. Neither are cheap but then again neither is a trip to the doctor or ER due to bad water.
sailstax is offline   Reply With Quote
Old 15-12-2016, 11:31   #12
Registered User

Join Date: Aug 2015
Posts: 26
Re: Restoring Fresh Water Tank

Hello again Here is a link for calculating different strengths and usages for Hydrogen peroxide. after you have used the stronger mixture, you just flush with fresh water and in lower concentrations, it is non toxic and benificial. I get mine at a health food store.
Hope all goes well with you!

https://www.dirtdoctor.com/garden/Hy...ter_vq4235.htm
GBonjour is offline   Reply With Quote
Old 15-12-2016, 12:23   #13
Registered User
 
JD-Odyssey's Avatar

Join Date: Nov 2016
Location: Devonshire, Bermuda
Boat: Hunter 41
Posts: 71
Re: Restoring Fresh Water Tank

If you decide to use bleach, just make sure it has no additives. Some companies, like Clorox, are putting additives in to reduce splashing and the labeling is very subtle. Others may add surfactants.
JD-Odyssey is offline   Reply With Quote
Old 15-12-2016, 12:28   #14
Registered User
 
LooseGoose's Avatar

Join Date: Feb 2016
Posts: 84
Re: Restoring Fresh Water Tank

The procedure outlined in Practical Sailor works very well....I use it every start of season myself.

Curing the Tainted Tank - Practical Sailor Print Edition Article

However, there are a few other things you may be able to do to improve your result. First, there will be sediment at the bottom of the tank. I hope you have an accessible drain fitting at the tank bottom. Remove that plug completely to encourage maximum outflow, and drain the tank into the bilge, pumping overboard. Next, if possible, mechanically clean where you can if you have and access point. Then, hit the inside of the tank, especially the bottom, with as much volume and pressure as possible to dislodge sediment sludge, and quickly drain effluent through the drain plug. Next, using any available method to seal a hose or fitting to the bottom drain (just hand pressure worked fine for me), fill a few gallons from the bottom, then let it drain quickly. Repeat until water runs clear.

A final trick to scrub an inaccessible tank bottom is to pick a really lumpy day, take the boat out into a seaway, and dump a bag or two of ice cubes down the filling fixture. The sea-induced boat motion will cause the cubes to run back and forth on the bottom of the tank, scrubbing whatever is left down there into solution....drain quickly. Back in port, prepare and apply the sanitizing method to your now "clean as can reasonably be"....tank, and water distribution plumbing and fixtures. Don't forget the hot water heater.

Cheers
LooseGoose is offline   Reply With Quote
Old 15-12-2016, 12:44   #15
Registered User
 
wrwakefield's Avatar

Join Date: Feb 2011
Location: Wintering in Wrangell, Alaska.
Boat: Nauticat 43
Posts: 1,228
Re: Restoring Fresh Water Tank

Quote:
Originally Posted by mervynmitchell View Post
I have bought an Alajuela 33 with stainless a steel water tank in which the water has remained unused for some time (2-3 years) and is stale and malodorous. Can anyone suggest an additive that will assist in disinfecting and deodorising the tank.

Thanks,

Mervyn Mitchell
Mervyn,

We maintain a list of the cleaners, etc. we have found effective.

As other have recommended, first do a thorough cleaning through the clean-out ports [or if you lack ports, a thorough fresh water flushing- I mean days of letting a low flow from a potable water hose run into the tank fill and overflow out the vent...]

For sanitizing/sweetening our stainless water tanks,we use Neutra Sul HP41N Professional Grade Oxidizer [for cleaning/sanitizing potable water tanks and plumbing- similar to 7% hydrogen peroxide]

It is cheap [~US$10/gallon including shipping] and won't corrode your tank or plumbing like bleach will.

I'm specifically recommending against bleach on stainless or aluminum... You can Google for reasons if you want to know more...

Best wishes getting your water potable again.

Cheers!

Bill

PS: Years ago on another smaller boat, I had a 'friend' unintentionally pour gasoline into the potable water tank instead of the fuel tank [Atomic 4 engine...] I didn't discover this until I returned to the boat about a month later... I successfully restored that plastic tank to potable use by flushing with fresh water and treating with a strong hydrogen peroxide- similar to the product I mentioned above... I didn't think that was going to be possible, but it was cheap to try...
__________________

__________________
SV Denali Rose

Short on opinions; focused on research, facts & experience [yours and ours...]
wrwakefield is offline   Reply With Quote
Reply

Tags
fresh water tank, 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
Fresh Water, Gray Water and Black Water Holding Tanks vweber Plumbing Systems and Fixtures 10 13-07-2018 20:25
Refrigerator Water Cooled to Fresh Water Tank kiltym Plumbing Systems and Fixtures 47 27-05-2013 10:30
Convert Fresh Water Tank to Holding Tank - Stainless myocean Plumbing Systems and Fixtures 5 17-01-2013 09:05
Fresh water tank treatment irwinsailor Construction, Maintenance & Refit 10 23-03-2011 11:19
Fresh water tank leak lannen Construction, Maintenance & Refit 4 09-10-2003 17:55

Advertise Here


All times are GMT -7. The time now is 19:33.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.