Through-Hulls - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Chat  
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > On Board > Gear & Maintenance
 Not a Member? 
  #1  
Old 08-29-2007
kwaltersmi's Avatar
Broad Reachin'
 
Join Date: Aug 2006
Location: Grand Rapids, Michigan
Posts: 1,911
Thanks: 1
Thanked 16 Times in 16 Posts
Rep Power: 9
kwaltersmi is on a distinguished road
Through-Hulls

My current project boat (Helms 25) only has one through-hull. The through-hull is plumbed to two separate drains in the cockpit. My plan is to add a through-hull or two for a couple of bilge pumps I plan to install. Frankly, I'm surprised that the boat didn't come from the factory with a through-hull for a bilge pump.

My question is: How do I determine the proper location in the bilge to mount the pumps? I would assume that at least one should be in or very near the lowest part of the bilge. My initial thought is that the back-up bilge pump should be mount a bit higher in the bilge.
__________________
Catalina 34

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Quick reply to this message Share with Facebook
  #2  
Old 08-29-2007
sailingdog's Avatar
Telstar 28
 
Join Date: Mar 2006
Location: New England
Posts: 43,290
Thanks: 0
Thanked 14 Times in 12 Posts
Rep Power: 13
sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice
I wouldn't put the through-hull for the bilge pumps below the water line. That makes it very difficult for the pump to evacuate the water... since it has to fight the pressure of the water on the output lines... Generally, the output for the bilge pumps is above the waterline.

I would mount a small "maintenance" bilge pump down in the bilge as low as possible, with a relatively small capacity and a relatively small diameter hose. This minimizes the return water that comes down the hose when the pump shuts off. Then mount a larger, high-capacity pump about the same level, but with its switch a bit higher than the one for the small maintenance pump. That way, this larger pump will empty the bilge if the small pump gets overwhelmed, but will stay off otherwise.
__________________
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.
Reply With Quote Quick reply to this message Share with Facebook
  #3  
Old 08-29-2007
kwaltersmi's Avatar
Broad Reachin'
 
Join Date: Aug 2006
Location: Grand Rapids, Michigan
Posts: 1,911
Thanks: 1
Thanked 16 Times in 16 Posts
Rep Power: 9
kwaltersmi is on a distinguished road
Good stuff SD (or should I call you Don Casey?). Most of what you recommend is mirrored by Don Casey in his books.

The bilge pump installation is my biggest concern at the moment. My boat has a swing keel and I fear that it's going to have a slow leak (or worse, a fast leak!). The boat will be moored and I'll be away from it for at least a week at a time. I guess I'll know more after I splash the boat next spring and keep a close eye on it for a week or two before leaving it. My biggest fear is the pumps and batteries not being able to keep up with a leak while I'm NOT on the boat. Perhaps I'll need a solar panel for reasurrance.
__________________
Catalina 34

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Quick reply to this message Share with Facebook
  #4  
Old 08-29-2007
sailingdog's Avatar
Telstar 28
 
Join Date: Mar 2006
Location: New England
Posts: 43,290
Thanks: 0
Thanked 14 Times in 12 Posts
Rep Power: 13
sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice
Get a solar panel to help keep the batteries topped off...and install a bilge pump counter... and log the readings when you are about to leave the boat.
__________________
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; 08-29-2007 at 06:47 PM.
Reply With Quote Quick reply to this message 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:

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

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Cored hulls and logs ArgleBargle Boat Review and Purchase Forum 1 05-04-2007 03:29 PM
Through hulls drynoc Gear & Maintenance 5 08-14-2006 02:47 PM
Hobie Hulls oldcat Gear & Maintenance 2 04-01-2004 04:53 PM
Cleaning Fiberglass Hulls and Decks Sue & Larry Gear and Maintenance Articles 0 03-07-2002 08:00 PM
Cored Hulls Jon Shattuck Gear and Maintenance Articles 0 10-03-2000 09:00 PM


All times are GMT -4. The time now is 05:04 PM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2015, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012

The SailNet.com store is owned and operated by a company independent of the SailNet.com forum. You are now leaving the SailNet forum. Click OK to continue or Cancel to return to the SailNet forum.