Washdown pump water source - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
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 04-26-2007
Member
 
Join Date: Jan 2007
Location: Baltimore
Posts: 67
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 8
Archis is on a distinguished road
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.
Reply With Quote Share with Facebook
  #2  
Old 04-26-2007
TrueBlue's Avatar
Señor Member
 
Join Date: Oct 2004
Location: Narragansett Bay
Posts: 4,853
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 12
TrueBlue is a jewel in the rough TrueBlue is a jewel in the rough TrueBlue is a jewel in the rough
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
Reply With Quote Share with Facebook
  #3  
Old 04-26-2007
Member
 
Join Date: Jan 2007
Location: Baltimore
Posts: 67
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 8
Archis is on a distinguished road
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.
Reply With Quote Share with Facebook
  #4  
Old 04-26-2007
TrueBlue's Avatar
Señor Member
 
Join Date: Oct 2004
Location: Narragansett Bay
Posts: 4,853
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 12
TrueBlue is a jewel in the rough TrueBlue is a jewel in the rough TrueBlue is a jewel in the rough
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.
Reply With Quote Share with Facebook
  #5  
Old 04-26-2007
camaraderie's Avatar
moderate?
 
Join Date: May 2002
Location: East Coast
Posts: 13,878
Thanks: 0
Thanked 2 Times in 2 Posts
Rep Power: 15
camaraderie is a jewel in the rough camaraderie is a jewel in the rough camaraderie is a jewel in the rough
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.
Reply With Quote Share with Facebook
  #6  
Old 04-26-2007
sailingdog's Avatar
Telstar 28
 
Join Date: Mar 2006
Location: New England
Posts: 43,291
Thanks: 0
Thanked 9 Times in 9 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
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.
Reply With Quote Share with Facebook
  #7  
Old 04-29-2007
Member
 
Join Date: Jan 2007
Location: Baltimore
Posts: 67
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 8
Archis is on a distinguished road
Thanks, that's kind of what I figured.
Reply With Quote Share with Facebook
  #8  
Old 05-08-2007
Member
 
Join Date: Jan 2007
Location: Baltimore
Posts: 67
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 8
Archis is on a distinguished road
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.
Reply With Quote Share with Facebook
  #9  
Old 05-08-2007
TrueBlue's Avatar
Señor Member
 
Join Date: Oct 2004
Location: Narragansett Bay
Posts: 4,853
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 12
TrueBlue is a jewel in the rough TrueBlue is a jewel in the rough TrueBlue is a jewel in the rough
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.
Reply With Quote Share with Facebook
  #10  
Old 05-08-2007
sailingdog's Avatar
Telstar 28
 
Join Date: Mar 2006
Location: New England
Posts: 43,291
Thanks: 0
Thanked 9 Times in 9 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
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.
Reply With Quote Share with Facebook
Reply


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
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


All times are GMT -4. The time now is 04:22 PM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, 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.