Cruising GPD water usage average - SailNet Community
Reply
 
LinkBack Thread Tools
post #1 of 27 Old 07-03-2008 Thread Starter
Wannabe Sailing Bum
 
Vitesse473's Avatar
 
Join Date: Mar 2008
Location: SF Bay Area
Posts: 142
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 8
 
Cruising GPD water usage average

Searching the forum pulled up some discussions on watermakers, but none really seemed to note any GPD averages. I will have 5 guys aboard my boat for 10 days, with really no place to replenish the water supply. I've struggled with the notion of adding a $4k+ watermaker for those 10 days. Just doesn't jive with me to spend that kind of money for something I won't use that often.

So, I have three tanks totalling 222 gallons. I figure for water consumption, using nice round numbers that if all of us were 200lbs, we'd need 128ounces per day for 10 days which equals 7.81gpd. Times 5 crew is 40 gallons. I can carry that in water cans.

How do you figure usage for cooking, quick pots/pan/utensil rinse and a shower, say, every other day?
Vitesse473 is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #2 of 27 Old 07-03-2008
Senior Member
 
Boasun's Avatar
 
Join Date: Feb 2007
Location: New Orleans, LA
Posts: 3,070
Thanks: 1
Thanked 0 Times in 0 Posts
Rep Power: 10
   
Sorry no showers. You have 222 gls of water; 10 days planned for five people. That makes for each 4.4 gl a day for each of them... Nope! No Showers.
Recommend that you could if there is room 5 gls of bottled water per day. That equals out to to 12.5 cases (4 gl per case). Still no showers but you will have enough for cooking and drinking. This is addition to your tankage. and up the water to 5.4 gallons per person per day.

1600 Ton Master, 2nd Mate Unlimited Tonnage

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Maritime Instructor
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

S/V Rapture
Boasun is offline  
Quote Quick Reply Share with Facebook
post #3 of 27 Old 07-03-2008
Sailor
 
Plumper's Avatar
 
Join Date: Nov 2007
Location: Vancouver Island
Posts: 845
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 8
 
I think 4.4 gallons per man per day (which is what you've got) will be lots. Just measure your usage after 2 days and make some adjustments if you have to.

There is a tide in the affairs of men,
Which, taken at the flood, leads on to fortune;
Omitted, all the voyage of their life
Is bound in shallows and in miseries.
Shakespeare, Julius Caesar IV, iii, 217
Plumper is offline  
Quote Quick Reply Share with Facebook
post #4 of 27 Old 07-03-2008
Telstar 28
 
sailingdog's Avatar
 
Join Date: Mar 2006
Location: New England
Posts: 43,290
Thanks: 0
Thanked 15 Times in 12 Posts
Rep Power: 14
         
Most offshore races recommend 1 gallon per person, per day. That would be 50 gallons, and includes cooking, but nut not washing dishes or showering. Also, unless you're using a solar shower or some other method that can help you keep precise track of water usage, showers are going to eat up more water than budgeted. I'd recommend using a salt water shower with a fresh water rinse instead. Same thing for the dishes.

If you've got 200+ gallons of tankage and carry 50 gallons in jerry cans for drinking, you can use the 200 gallons for showers, washing and rinsing.

Sailingdog

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
.

Still—DON'T READ THAT POST AGAIN.
sailingdog is offline  
Quote Quick Reply Share with Facebook
post #5 of 27 Old 07-03-2008 Thread Starter
Wannabe Sailing Bum
 
Vitesse473's Avatar
 
Join Date: Mar 2008
Location: SF Bay Area
Posts: 142
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 8
 
Thanks for the advice. Showering is obviously optional. We'll be on the hook two times about every 3rd day, so I figure we can wash in the ocean and then fresh water rinse from my transom shower hose.

Agreed on doing the dishes in the drink and then rinsing fresh at the sink.

Sounds like you all are suggesting I could make due just fine. I'd prefer to spend money on a new Racor filter system, and possibly some solar panels.
Vitesse473 is offline  
Quote Quick Reply Share with Facebook
post #6 of 27 Old 07-03-2008
Telstar 28
 
sailingdog's Avatar
 
Join Date: Mar 2006
Location: New England
Posts: 43,290
Thanks: 0
Thanked 15 Times in 12 Posts
Rep Power: 14
         
Given that others have made far longer passages in boats with less water tankage, you should be fine.

Sailingdog

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
.

Still—DON'T READ THAT POST AGAIN.
sailingdog is offline  
Quote Quick Reply Share with Facebook
post #7 of 27 Old 07-03-2008
Senior Member
 
GeorgeB's Avatar
 
Join Date: Dec 2004
Location: Alameda, San Francisco Bay
Posts: 1,820
Thanks: 1
Thanked 52 Times in 51 Posts
Rep Power: 11
 
Baja this Fall?

Did I read your “broach” thread correctly that you are Baja bound this fall? Is that the ten days/five guys trip? You may want to give that water maker a second glance. Most of our friends who have gone cruising Baja and western Mexico installed water makers and the one of the two who did not is bringing one down to P.V. to install it there. The guy who did not, did very little cruising there before bashing home. On the Pacific side of Mexico water isn’t plentiful, municipal water suspect, and jerry jugging it out to an anchorage is not much fun. It just os happens that I’m in the final stages of installing a Spectra Ventura 150. Pretty complicated and the yard work (you may need 1-2 new thru hulls) and installation will bring the final tab well over the $4,400 purchase price. The downside to the unit is you need to make fresh water at least once every five days to keep the osmosis membrane from clogging up. They have a controller that will do an automatic back flush with fresh water every five days or you can “pickle” the membrane with a special compound that is good for up to five months storage. The other downside is the unit is a bit of a power pig as it chews up 9-10 amps per hour of operation. On the other hand, once, back in the 80's, I caught amoeba dysentery and I wouldn't wish that on anyone.
GeorgeB is online now  
Quote Quick Reply Share with Facebook
post #8 of 27 Old 07-03-2008 Thread Starter
Wannabe Sailing Bum
 
Vitesse473's Avatar
 
Join Date: Mar 2008
Location: SF Bay Area
Posts: 142
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 8
 
Quote:
Originally Posted by GeorgeB View Post
Did I read your “broach” thread correctly that you are Baja bound this fall? Is that the ten days/five guys trip?
Yup, that was my broach thread, and yes, we are Cabo bound this fall. I sent a note to my crew asking their opinion of going without the $4k watermaker. The best response I got from one of my crew was this...

..."I recently discovered that neither the Nina, the Pinta or the Santa Maria had watermakers."

The other funny response was that they preferred I spent money on power generation so they could run their hair dryers before cocktail hour.

I think I have the appropriate crew for the ride south :-)
Vitesse473 is offline  
Quote Quick Reply Share with Facebook
post #9 of 27 Old 07-03-2008
Telstar 28
 
sailingdog's Avatar
 
Join Date: Mar 2006
Location: New England
Posts: 43,290
Thanks: 0
Thanked 15 Times in 12 Posts
Rep Power: 14
         
If you've got five guys that need to run hairdryers before cocktails, you're in trouble IMHO. I don't believe in wasting valuable amp-hours on a hairdryer unless it is for a cute boat bunny.

Quote:
Originally Posted by Vitesse473 View Post
Yup, that was my broach thread, and yes, we are Cabo bound this fall. I sent a note to my crew asking their opinion of going without the $4k watermaker. The best response I got from one of my crew was this...

..."I recently discovered that neither the Nina, the Pinta or the Santa Maria had watermakers."

The other funny response was that they preferred I spent money on power generation so they could run their hair dryers before cocktail hour.

I think I have the appropriate crew for the ride south :-)

Sailingdog

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
.

Still—DON'T READ THAT POST AGAIN.

Last edited by sailingdog; 07-03-2008 at 11:31 PM.
sailingdog is offline  
Quote Quick Reply Share with Facebook
post #10 of 27 Old 07-03-2008
1997 Dehler 33
 
max-on's Avatar
 
Join Date: Mar 2004
Location: Rhode Island
Posts: 745
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 12
 
Quote:
Originally Posted by sailingdog View Post
If you've got five guys that need to run hairdryers before cocktails, you're in trouble IMHO. I don't believe in wasting valuable amp-hours on a hairdryer unless it is for a cute boat bunny.
Now we know the 'true' reason for the inverter!
max-on is offline  
Quote Quick Reply Share with Facebook
Reply

Quick Reply
Message:
Options

By choosing to post the reply above you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Register Now



In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.


User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
Retirement Cruising Budgets Randy Harman Cruising Articles 0 05-12-2004 08:00 PM
Criteria for Successful Cruising Liza Copeland Her Sailnet Articles 0 08-27-2003 08:00 PM
Calculating the Cost of Cruising Paul & Sheryl Shard Her Sailnet Articles 0 04-03-2003 07:00 PM
Water storage while cruising sloopjohn Cruising & Liveaboard Forum 0 12-06-2001 07:48 PM

Posting Rules  
You may post new threads
You may 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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome