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Air Conditioning Inlet Strainer

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32mike View Drop Down
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Joined: 26 March 2020
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 32mike Quote  Post ReplyReply Direct Link To This Post Topic: Air Conditioning Inlet Strainer
    Posted: 31 March 2024 at 02:29
If you have this strainer installed in the bilge for A/C, it doesn’t hold up well.



So, just over 4 years, this is what I found when changing a hose out:



Then it completely broke off from the housing.

At least there’s a nice breeze blowing ….
Mike
S/V Dulces Sueños
458 #087
Tampa, FL
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Wayne's World View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Wayne's World Quote  Post ReplyReply Direct Link To This Post Posted: 31 March 2024 at 03:23
After 9.5 years we changed ours to plastic with True Design through hull, valve and nipples. But it was in much better shape than yours. The nipple on our engine sea water inlet cooling was however was not so good.  
Wayne W
Cruising, currently in the Caribbean and will head across the Pacific early 2024
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Black Diamond View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Black Diamond Quote  Post ReplyReply Direct Link To This Post Posted: 31 March 2024 at 10:40
I feel your pain.   Welcome to the world of "marine brass" and "cost savings.   While most of the Hanse is built to decent specs, or using industry standard components,  I find the raw water systems dangerous.    See the leak (in the middle of the casting) that popped up on the manifold, and the original seacock (I shouldn't really call it that) design.

I removed all the ball valve and thru hull combinations as I was convinced they were going to snap someday and replaced them with one piece, wide base, groco bronze.   TruDesign would work equally well, maybe better, given the bonding needed.


Original Hanse-installed "marine brass" manifold.

The original ball valve / thru-hull combination that had no wide base, where a reasonable amount of torque would snap it off.  I kept a lot of wood plugs on the boat in quick locations.   The strainer needed constant attention to keep clear and, for something you were accessing all the time,  it was mounted directly on the thru hull and flexing the marlon all the time. 


The new layout.   Strainer and thru-hull are separated, and nice wide based, one-piece, bronze in place.    No small number of these on a 575, BTW.

Rick
S/V Black Diamond
Hanse 575 Build #192, Hull# 161
Newport, RI
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kipwrite View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote kipwrite Quote  Post ReplyReply Direct Link To This Post Posted: 31 March 2024 at 20:45
That whole intake and manifold set up is, honestly, not fit for purpose. On my boat it wasn't properly connected to the bonding system, and started with a tiny pinhole leak and scary corrosion, as I recall, about 3 years in. Replaced the whole thing with a proper Groco strainer, and a proper bronze manifold, correctly bonded. 

I replaced all factory through hulls and marine brass seacocks at 5 years - most of which were surprisingly still in reasonable shape. 

If you have one of these AC intake and manifold set ups, it is a potential serious accident waiting to happen. Keep an eye on it and don't assume it's ok. 
Kipwrite
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32mike View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 32mike Quote  Post ReplyReply Direct Link To This Post Posted: 31 March 2024 at 21:22
They apparently used a different approach on the manifold. This is mine:



I looked up the strainer on-line. It’s Italian and listed as a “bracket-mounted” strainer. Maybe the factory was short on brackets that year?

I think I’ll see if I can get that Groco installed with the strainer not mounted on top of the seacock.
Mike
S/V Dulces Sueños
458 #087
Tampa, FL
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32mike View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 32mike Quote  Post ReplyReply Direct Link To This Post Posted: 05 April 2024 at 13:58
Rick,

I see in your photos that all of the through hulls are bonded to the ground somewhere. I have none of that bonding wire installed on my through hulls or strainer. Where are they bonded to?
Mike
S/V Dulces Sueños
458 #087
Tampa, FL
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Black Diamond View Drop Down
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Post Options Post Options   Thanks (1) Thanks(1)   Quote Black Diamond Quote  Post ReplyReply Direct Link To This Post Posted: 05 April 2024 at 21:24
The green bonding wire runs to the keel bolts.    I believe the rudder has a separate bonding circuit, although someone else could speak to that better than I. 

When I took delivery of the boat,   I checked each of the connections to make sure there was less than .01 (I think that was it) ohm resistance.   When I took delivery it was OK.  When I swapped the seacocks I rechecked things.    It's not something I do on a regular basis,  but it probably should be.

Rick




Rick
S/V Black Diamond
Hanse 575 Build #192, Hull# 161
Newport, RI
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