Washdown pump water source - SailNet Community
Reply
 
LinkBack Thread Tools
post #1 of 13 Old 04-26-2007 Thread Starter
Member
 
Join Date: Jan 2007
Location: Baltimore
Posts: 67
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 9
 
Washdown pump water source

I found a brand new washdown pump on my boat and have an installation question.

I have two possible sources for the seawater, the yanmar heat exchanger loop and the head seacock. Tapping into the HE loop is way more convienent, but I'm not sure if this is a good practice. Is tapping in the Yanmar HE loop a good practice?

Thanks

P.S. There currently is no washdown pump installed on the boat.
Archis is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #2 of 13 Old 04-26-2007
Señor Member
 
TrueBlue's Avatar
 
Join Date: Oct 2004
Location: Narragansett Bay
Posts: 4,853
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 13
     
We have a PAR seawater belt-driven pump with a dedicated through-hull which serves both the galley tap, aft deck and foredeck hose outlets. It's my opinion that your washdown pump should have it's own dedicated through-hull and valve. Doubling up with the HE hose or head through-hull is just asking for trouble.

If it's not worth doing right - don't do it.

True Blue . . .
sold the Nauticat
TrueBlue is offline  
Quote Quick Reply Share with Facebook
post #3 of 13 Old 04-26-2007 Thread Starter
Member
 
Join Date: Jan 2007
Location: Baltimore
Posts: 67
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 9
 
How much does it cost to add a new through-hull?

I'm not sure I like putting another hole in the bottom of my boat, it seems like yet another point of failure.
Archis is offline  
Quote Quick Reply Share with Facebook
post #4 of 13 Old 04-26-2007
Señor Member
 
TrueBlue's Avatar
 
Join Date: Oct 2004
Location: Narragansett Bay
Posts: 4,853
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 13
     
I suppose since my boat has 14 bronze seacocks and through-hulls, I would be the wrong guy to ask about minimizing hull penetrations. Costs will vary - depending upon who does the work of course. It's not that difficult, if you're already on the hard.

Don Casey has a good article for DIYers and an interesting viewpoint regarding through-hulls - counter to my suggestion - Installing a Seacock

Jamestown Distributors sells a Groco 3/4" flange base seacock for $110. and the Groco Thru-Hull Fittings - Bronze, NPS at $10.89.

True Blue . . .
sold the Nauticat

Last edited by TrueBlue; 04-26-2007 at 11:14 AM.
TrueBlue is offline  
Quote Quick Reply Share with Facebook
post #5 of 13 Old 04-26-2007
moderate?
 
camaraderie's Avatar
 
Join Date: May 2002
Location: East Coast
Posts: 13,877
Thanks: 0
Thanked 3 Times in 3 Posts
Rep Power: 16
     
Use a T on the head intake seacock. No problem with that at all. Don't mess with the HE loop...needs to be dedicated.
camaraderie is offline  
Quote Quick Reply Share with Facebook
post #6 of 13 Old 04-26-2007
Telstar 28
 
sailingdog's Avatar
 
Join Date: Mar 2006
Location: New England
Posts: 43,290
Thanks: 0
Thanked 14 Times in 12 Posts
Rep Power: 14
         
You can cause a lot of cooling system problems if you tap the line into the HE line. The head is a much safer place to tap into, and doesn't endanger the boat by doing so.

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 13 Old 04-29-2007 Thread Starter
Member
 
Join Date: Jan 2007
Location: Baltimore
Posts: 67
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 9
 
Thanks, that's kind of what I figured.
Archis is offline  
Quote Quick Reply Share with Facebook
post #8 of 13 Old 05-08-2007 Thread Starter
Member
 
Join Date: Jan 2007
Location: Baltimore
Posts: 67
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 9
 
I have a couple of questions now about installing the hose thru-hull for the pump output.

1) Is there a common location for mounting the hose attachment thru-hull? I'd like to find a location mid-ship so I could get by with a 25' hose on a 33' boat, but I want to keep the deck clear of things to trip over.

2) I'm not clear on how to drill the hole for the thru-hull. First should I over drill and fill with epoxy and then drill again?

3) Can I use a spade bit to drill through the fiberglass or should I use a hole saw? A spade bit seems like a bad idea, but I figured I better ask.
Archis is offline  
Quote Quick Reply Share with Facebook
post #9 of 13 Old 05-08-2007
Señor Member
 
TrueBlue's Avatar
 
Join Date: Oct 2004
Location: Narragansett Bay
Posts: 4,853
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 13
     
Following is an excerpt from the Don Casey article I linked in the above post:
Quote:
The instructions that follow assume that the boat is out of the water. A helper will be needed.
New Through-Hull
Installing a new through-hull fitting necessitates a new hole in the hull. Always locate seacocks where they are readily accessible or you defeat the purpose of having a valve in the line. Before you drill the hole, double-check the location carefully both inside and outside the hull to make sure, for example, that inside there will be ample room to throw the handle, and outside the new fitting is not going to set up turbulence in front of your depth sounder or speed log impeller. From inside the hull, drill a small pilot hole and check the location one more time.

Select a hole saw the size of the fitting you are installing and cut the required hole by first drilling from the outside of the hull until the pilot drill in the hole saw penetrates the hull, then finish the hole by drilling from the inside. Clean up the edges of the hole with emery cloth. If the hull is cored, dig out the core around the hole to hollow an area at least as large as the flange of the seacock you are installing. Fill the hollow area with epoxy putty and allow it to fully harden before proceeding. The epoxy provides a solid base for the through-hull and prevents water from reaching the core material.
In the past, I have used two types of hole saws for through-hulls. Do not use your spade bit. Whether using a fixed diameter saw, or adjustable, the hole should be slightly larger than the fitting OD. My adjustable tool is invaluable for cutting mutiple diameter holes, and is what I usually prefer when working with FRP and sheet stock :



The location of your deck hose outlet can be placed anywhere you feel to be convenient. My boat has two, one at the bow for anchor mess clean-up and the other just under the cowling, on the aft deck helm console of my pilothouse. Both fittings are stainless and fitted with screw caps to keep the line pressurized when using the galley tap and to keep debris and unwanted water out of the line. I also use seawater for washing my teak decks.

True Blue . . .
sold the Nauticat

Last edited by TrueBlue; 05-08-2007 at 08:32 AM.
TrueBlue is offline  
Quote Quick Reply Share with Facebook
post #10 of 13 Old 05-08-2007
Telstar 28
 
sailingdog's Avatar
 
Join Date: Mar 2006
Location: New England
Posts: 43,290
Thanks: 0
Thanked 14 Times in 12 Posts
Rep Power: 14
         
Hey TB-

Where'd you get the adjustable hole saw??

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
Reply

Quick Reply
Message:
Options

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
Deck Washdown Systems Sue & Larry Cruising Articles 0 02-23-2004 07:00 PM
Devising a Better Bilge Pump Don Casey Seamanship Articles 0 06-02-2002 08:00 PM
Devising a Better Bilge Pump Don Casey Gear and Maintenance Articles 0 06-02-2002 08:00 PM
Devising a Better Bilge Pump Don Casey Cruising Articles 0 06-02-2002 08:00 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