Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 15-05-2007, 14:26   #1
Registered User
 
donw_s11's Avatar

Join Date: Apr 2007
Location: Austin, TX, USA
Boat: Irwin Citation 38
Posts: 40
Raw (Seawater) Strainers for HVAC etc. use

I'm curious what other people are using for raw water strainers on saltwater boats. The reason I ask is that I've got a stainless mesh strainer in front of my AC H20 pump that has holes in it one year after installation (See pic).

I'd like to replace it with something that will last at least five years or so between replacements if possible to avoid having to try to find parts while out in the boonies.

Groco makes a bronze strainer body with a Monel strainer ($$$), which would be worthwhile if it really lasts. Does anyone make a plastic strainer that lasts?

Suggestions?

Don W.
Attached Thumbnails
Click image for larger version

Name:	H2O Strainer1.jpg
Views:	239
Size:	49.3 KB
ID:	1143  
__________________

__________________
donw_s11 is offline   Reply With Quote
Old 15-05-2007, 14:43   #2
Senior Cruiser
 
colemj's Avatar

Cruisers Forum Supporter

Join Date: Oct 2005
Location: Presently on US East Coast
Boat: Manta 40 "Reach"
Posts: 10,049
Images: 12
I have 4 similar strainers on our boat and after 9 years, only one of them had a corrosion issue. Mine didn't look rusty like yours, it just was eaten away in a couple of places. The others are perfect. I can't remember offhand if ours are Groco or Sherwood, but I think they are Groco. You can get replacement strainers for them cheaply. Maybe you just got a bad one?

Mark
__________________

__________________
colemj is offline   Reply With Quote
Old 15-05-2007, 15:45   #3
Registered User
 
markpj23's Avatar

Join Date: Nov 2005
Location: Black Hills, SD
Boat: Now Boatless
Posts: 1,148
Images: 47
I have these Forespar units for everything - genset, main engine, A/C units, everything. Plastic interior baskets. The only complaint I have is that the lid supports (underneath the threaded knob) are plastic and you can break them off if you crank down on the cover nut too much. Else they are maintenance-free.



__________________
Mark
markpj23 is offline   Reply With Quote
Old 15-05-2007, 18:20   #4
Marine Service Provider
 
AnchorageGuy's Avatar

Join Date: Mar 2003
Location: Wherever the boat is!
Boat: Marine Trader 34DC
Posts: 4,618
That ain't no sea strainer that's a water filter.
__________________
Chesapeake Bay, ICW Hampton Roads To Key West, The Gulf Coast, The Bahamas

The Trawler Beach House
Voyages Of Sea Trek
AnchorageGuy is offline   Reply With Quote
Old 15-05-2007, 22:30   #5
Moderator Emeritus
 
Pblais's Avatar

Join Date: Mar 2003
Location: Hayes, VA
Boat: Gozzard 36
Posts: 8,700
Images: 15
Send a message via Skype™ to Pblais
If it's below the waterline that sure is no sea strainer. Almost all filters for AC I'm aware of are below the water line. As Chuck notes it's a prefilter from you fresh water tank before it goes to the pump. It's just a toy strainer to protect the pump. You need a much larger one when you get into jelly fish they clog too easy. It's also plastic. You should be looking at what you find on the raw water filter for the engine would be more appropriate. The Vetus raw water filter I have would not work for the AC but is fine for the engine as the top is above the water line. The Forespar looks like the Vetus. I would not use one below the water line. if you break the plastic cover you will sink if it's below the water line.

I also find a March pump is much more relaible than most others. Cheap Cal pumps suck. The March pump head is made of nylon and can be replaced. A Cal pump dies and you toss it and much sooner.
__________________
Paul Blais
s/v Bright Eyes Gozzard 36
37 15.7 N 76 28.9 W
Pblais is offline   Reply With Quote
Old 16-05-2007, 04:47   #6
Moderator Emeritus
 
GordMay's Avatar

Join Date: Mar 2003
Location: Thunder Bay, Ontario - 48-29N x 89-20W
Boat: (Cruiser Living On Dirt)
Posts: 31,577
Images: 240
As indicated, the previously pictured are "toy" strainers for already clean water.
This is a real seawater strainer:
Attached Thumbnails
Click image for larger version

Name:	Valve-Strainer.gif
Views:	312
Size:	116.8 KB
ID:	1148  
__________________
Gord May
"If you didn't have the time or money to do it right in the first place, when will you get the time/$ to fix it?"



GordMay is online now   Reply With Quote
Old 16-05-2007, 12:54   #7
Registered User
 
donw_s11's Avatar

Join Date: Apr 2007
Location: Austin, TX, USA
Boat: Irwin Citation 38
Posts: 40
Churk, Paul, and Gord

Well, right now its not much of a filter either. None the less, this is the "filter" that the PO installed with the new AC shortly before I bought the boat. It was installed below the waterline with a short hose to a thru-hull, and inline before the AC H2O pump. I believe that it probably came as part of the installation kit with the AC.

As you can see, I didn't think much of the installation--or the longevity of the device (which is why its currently setting on my desk instead of installed in the boat). I'd like to replace it with something better (he says hopefully), and would like to hear suggestions, and other peoples experiences with the devices they have in their boats.

BTW, my boat currently does not have a strainer in the cooling water loop for the raw water cooled engine (yanmar 3HM). Should it have?

Don W.
__________________
donw_s11 is offline   Reply With Quote
Old 16-05-2007, 12:56   #8
Registered User
 
donw_s11's Avatar

Join Date: Apr 2007
Location: Austin, TX, USA
Boat: Irwin Citation 38
Posts: 40
Mark,

Groco makes both stainless strainers, and monel strainers. Do you have any idea which yours are?

I suspect that this one was 304 stainless or similar based on how quickly it corroded.

Don W.
__________________
donw_s11 is offline   Reply With Quote
Old 16-05-2007, 12:57   #9
Registered User
 
coot's Avatar

Join Date: Feb 2006
Posts: 367
Images: 2
Quote:
Originally Posted by donw_s11
I'm curious what other people are using for raw water strainers on saltwater boats. The reason I ask is that I've got a stainless mesh strainer in front of my AC H20 pump that has holes in it one year after installation (See pic).
The picture you posted looks like a Groco with the stainless steel screen. Groco also makes a plastic screen that fits into the same strainer body. The holes in the plastic screen are larger -- about the size of the holes in the strainer that Gord shows.
__________________
Mark S.
coot is offline   Reply With Quote
Old 16-05-2007, 13:31   #10
Senior Cruiser
 
colemj's Avatar

Cruisers Forum Supporter

Join Date: Oct 2005
Location: Presently on US East Coast
Boat: Manta 40 "Reach"
Posts: 10,049
Images: 12
Don,

I don't know whether mine are monel or SS. If they make monel, why not just buy a replacement screen?

Mark
__________________
colemj is offline   Reply With Quote
Old 16-05-2007, 14:26   #11
Registered User
 
markpj23's Avatar

Join Date: Nov 2005
Location: Black Hills, SD
Boat: Now Boatless
Posts: 1,148
Images: 47
Quote:
Originally Posted by donw_s11
BTW, my boat currently does not have a strainer in the cooling water loop for the raw water cooled engine (yanmar 3HM). Should it have?
ABSOLUTELY!!
__________________
Mark
markpj23 is offline   Reply With Quote
Old 16-05-2007, 15:32   #12
Registered User
 
donw_s11's Avatar

Join Date: Apr 2007
Location: Austin, TX, USA
Boat: Irwin Citation 38
Posts: 40
Quote:
Originally Posted by markpj23
ABSOLUTELY!!
Hmm... That's good to know

Don
__________________
donw_s11 is offline   Reply With Quote
Old 16-05-2007, 17:49   #13
Marine Service Provider
 
AnchorageGuy's Avatar

Join Date: Mar 2003
Location: Wherever the boat is!
Boat: Marine Trader 34DC
Posts: 4,618
Don, Look at the strainer set up on your engine then go to your local Marine supply store and find one just a bit smaller and that will acomodate the size hose barbs you will need for the AC. Install it just after the thru hull valve and you are in business. Be sure to blead the water to at least the discharge end of your AC unit so you don't get air locked.
__________________

__________________
Chesapeake Bay, ICW Hampton Roads To Key West, The Gulf Coast, The Bahamas

The Trawler Beach House
Voyages Of Sea Trek
AnchorageGuy is offline   Reply With Quote
Reply

Tags
hvac

Thread Tools
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
sail drive raw water strainers schoonerdog Construction, Maintenance & Refit 2 17-04-2007 11:25



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 07:25.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.