Cruisers Forum
 


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 01-05-2021, 12:42   #1
Registered User

Join Date: Oct 2020
Location: SE USA
Boat: Hunter 38
Posts: 302
Leaving the boat for a week - Water tank empty or full?

Newbie 1 week into boat ownership.

I'm leaving the boat for a week in Ft. Pierce.

water tank">Fresh water tank just emptied. I have the option of leaving it empty until I return and filling it then, or filling now and letting it stand.

I use a 2-stage 20 and 5 micron filter household (10") water filter to filter incoming water.

Does it make a difference? I'm inclined to leave it empty.
flightlead404 is offline   Reply With Quote
Old 01-05-2021, 12:44   #2
Registered User

Join Date: Oct 2020
Boat: Coast 34 Sail
Posts: 148
Re: Leaving the boat for a week - Water tank empty or full?

one week doesn’t matter
Tomodore is offline   Reply With Quote
Old 01-05-2021, 12:48   #3
Registered User

Join Date: Dec 2007
Location: Hawaii
Boat: Tartan T4400
Posts: 240
Re: Leaving the boat for a week - Water tank empty or full?

One week is no big deal. Is it on a mooring on in a slip. In our marina everyone looks out for each other. Maybe let you neighbor know you are gone for the week and give them your phone number. I will leave water in my tanks for three months then dump it if not used.
__________________
Aloha
Mike
Gudgeon is offline   Reply With Quote
Old 01-05-2021, 12:51   #4
Registered User
 
Marathon1150's Avatar

Join Date: Jan 2012
Location: Vancouver, Canada; Papeete, Tahiti
Boat: Beneteau Idylle 1150 (Papeete), Beneteau First 35s5 (Vancouver)
Posts: 395
Images: 11
Re: Leaving the boat for a week - Water tank empty or full?

I share the view that it doesn't matter - empty, partially full or full.

We often left water in the tanks for months at a time but dumped it when we returned to the boat. We also used a UV unit, carbon block and 5 micron filter on all of the water going into those tanks.

I do however turn off the water pressure pump.
__________________
Desolation Island is situated in a third region, somewhere between elsewhere and everywhere.
Jean-Paul Kauffmann
Marathon1150 is offline   Reply With Quote
Old 01-05-2021, 13:20   #5
Registered User

Join Date: Oct 2020
Location: SE USA
Boat: Hunter 38
Posts: 302
Re: Leaving the boat for a week - Water tank empty or full?

Pumps will be off, shore side water supply disconnected.

Glad to hear its not a big deal either way.
flightlead404 is offline   Reply With Quote
Old 01-05-2021, 16:27   #6
Registered User

Join Date: Dec 2019
Location: Clear Lake Shores, TX
Boat: 2000 Catalina 470 #058
Posts: 408
Re: Leaving the boat for a week - Water tank empty or full?

Yep. Not a problem if the pump is off and never leave the shore water connected when not there.
__________________
Sailing a Catalina 470; Working hard
GreenWave is offline   Reply With Quote
Old 02-05-2021, 03:40   #7
Registered User

Join Date: Mar 2021
Posts: 353
Re: Leaving the boat for a week - Water tank empty or full?

In general the advice is water tanks empty, fuel tanks full.

Add biocide to the fuel before you leave, rinse the water-tanks when you return.

However for 2 weeks or a month, it doesn't matter at all. Just make sure you don't leave the filling-caps open.
Joh.Ghurt is offline   Reply With Quote
Old 02-05-2021, 08:36   #8
Registered User

Join Date: Dec 2018
Posts: 46
Re: Leaving the boat for a week - Water tank empty or full?

It does not really matter but I prefer keeping them full.
patrickbarbary is offline   Reply With Quote
Old 02-05-2021, 08:50   #9
MJH
Registered User
 
MJH's Avatar

Join Date: Feb 2007
Location: Gig Harbor, WA
Boat: Tayana Vancouver 42ac
Posts: 721
Re: Leaving the boat for a week - Water tank empty or full?

Quote:
Originally Posted by flightlead404 View Post
Newbie 1 week into boat ownership.

I'm leaving the boat for a week in Ft. Pierce.

Fresh water tank just emptied. I have the option of leaving it empty until I return and filling it then, or filling now and letting it stand.

I use a 2-stage 20 and 5 micron filter household (10") water filter to filter incoming water.

Does it make a difference? I'm inclined to leave it empty.
I fill my s.s. water tanks (2 x 100gals.) each spring and top-off as necessary. When I winterize the boat in the fall the tanks are emptied.

~ ~ _/) ~ ~ MJH
MJH is offline   Reply With Quote
Old 02-05-2021, 08:51   #10
Registered User
 
S/V Illusion's Avatar

Join Date: Oct 2007
Location: Lakewood Ranch, FLORIDA
Boat: Alden 50, Sarasota, Florida
Posts: 2,699
Re: Leaving the boat for a week - Water tank empty or full?

Quote:
Originally Posted by flightlead404 View Post
Newbie 1 week into boat ownership.

I'm leaving the boat for a week in Ft. Pierce.

Fresh water tank just emptied. I have the option of leaving it empty until I return and filling it then, or filling now and letting it stand.

I use a 2-stage 20 and 5 micron filter household (10") water filter to filter incoming water.

Does it make a difference? I'm inclined to leave it empty.
You are kidding, right?
S/V Illusion is online now   Reply With Quote
Old 02-05-2021, 09:10   #11
Registered User

Join Date: Jun 2009
Location: Annapolis, MD
Boat: Gozzard, 44CC, 50'
Posts: 403
Re: Leaving the boat for a week - Water tank empty or full?

I ight be wrong about this but doesn't mold need air to grow? That's why I leave mine full. (Air gets in thru the vent) I find that a table spoon of baking soda helps keep the water tasting fresh. FYI I've been told a piece of copper in the tank also kills microbes.
Scrimshaw4 is offline   Reply With Quote
Old 02-05-2021, 11:48   #12
Registered User

Join Date: Mar 2021
Posts: 353
Re: Leaving the boat for a week - Water tank empty or full?

Quote:
Originally Posted by Scrimshaw4 View Post
I ight be wrong about this but doesn't mold need air to grow? That's why I leave mine full. (Air gets in thru the vent) I find that a table spoon of baking soda helps keep the water tasting fresh. FYI I've been told a piece of copper in the tank also kills microbes.
True, but full water tanks get all slimy on the walls under the water-line. If the waterline is low, the tank above has a chance to dry out and you'll have less to clean.

Also water gets stale over time and it's easier to empty it before you leave than when you come back.
Joh.Ghurt is offline   Reply With Quote
Old 02-05-2021, 12:06   #13
Registered User

Join Date: Sep 2016
Boat: Montgomery 23
Posts: 201
Re: Leaving the boat for a week - Water tank empty or full?

Quote:
Originally Posted by flightlead404 View Post
Newbie 1 week into boat ownership.

I'm leaving the boat for a week in Ft. Pierce.

Fresh water tank just emptied. I have the option of leaving it empty until I return and filling it then, or filling now and letting it stand.

I use a 2-stage 20 and 5 micron filter household (10") water filter to filter incoming water.

Does it make a difference? I'm inclined to leave it empty.
If you empty it, you might consider leaving the fill cap open, or at least cracked, and securing it (so nothing crawls inside) with a piece of s.s. or aluminum screen and a hose clamp. Or similar.
I've been told that even a little bit of air movement helps prevent mildew/mold.
For whatever it's worth!
rmlarson1098 is offline   Reply With Quote
Old 02-05-2021, 12:15   #14
Registered User
 
MartinR's Avatar

Join Date: Feb 2015
Location: Sweden
Boat: 73ŽULDB custom ketch
Posts: 1,021
Re: Leaving the boat for a week - Water tank empty or full?

In my opinion: empty or full

No need to overthink.
MartinR is offline   Reply With Quote
Old 02-05-2021, 13:04   #15
Registered User

Join Date: Dec 2009
Location: Cruising, now in USVIs
Boat: Taswell 43
Posts: 729
Re: Leaving the boat for a week - Water tank empty or full?

We share the opposite view. We've long heard that mold needs air to grow. If you empty your tanks, then all the fittings and hoses are also moist but full of air-the perfect breeding ground. We leave our boat on the hard every hurricane season (in the tropics, no threat of freezing)-and we leave the water and fuel tanks full, trying to minimize that mold/etc growth (if the tank/lines/fittings are full of water, there is no free air there). Then, when we return and resplash, we pump out that water, refill and add a little bleach per tank, waste that load, and then fill for use. so far-no issues. IF....you can drain and dry your tanks, and hoses, and fittings easily....well, that may be a different situation. But we can't drain and dry, so we leave them full of water/fuel. So far, it seems to work well ( now some 22 years later!)
sailcrazy is offline   Reply With Quote
Reply

Tags
boat, 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
Full or empty water tank in tropical temperatures Oceansailor Construction, Maintenance & Refit 84 18-08-2019 13:08
Summer storage in FL -- Water tank full or empty nknowland Plumbing Systems and Fixtures 26 21-05-2017 21:53
Advice on Putting a Water Tank in Empty Engine Void captain-cowboy Construction, Maintenance & Refit 28 03-10-2014 09:34
General Info: Potable water gauge reads full until almost empty Dragon Lady Fountaine Pajot 9 19-01-2013 08:20

Advertise Here


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


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2021, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2021, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.