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14-01-2025, 08:00
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#1
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Registered User
Join Date: Jul 2023
Location: Norway (south/west coast)
Boat: Stadel (Mariner) 48
Posts: 11
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2" 1980? seacock & bend, anyone knows which and how to replace bend and service valve
I'm sure there's already several answers on this, but finding the answer when all I know is a picture of the problem, is kind of hard, so nice if someone recognizes this valve and how it's installed or how it can be serviced, and can give me some more info to go on in order to find relevant info / threads.
I don't manage to close the valve / don't dare to use enough force to close it, and it's probably not been done for 20 years.
It's coroding (white) at the lower side of the bend, and if I clean away the white, then in a few months there's plenty of white there again, so I don't even dare touching the bend while she's still on water (it's the cockpit drain).
The boat generally has bronze valves, and I'd like to keep it like that, most of them are still doing just fine (just a tinye bit of green here and there).
I have never replaced or serviced a valve before (just done home plumming).
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Finn @ 20 tons of 1980 48" GRP Ketch
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14-01-2025, 08:17
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#2
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Registered User
Join Date: Oct 2021
Posts: 685
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Re: 2" 1980? seacock & bend, anyone knows which and how to replace bend and service v
That looks very much like an old Spartan or similar "tapered cone seacock". They are very robust and simple to service. The nut on the shaft opposite the handle comes off, and then the cone gets tapped toward the handle and comes out of the body. Clean, (lap), grease, replace. An article with pictures and a complete description:
https://marinehowto.com/servicing-ta...cone-seacocks/
In a pinch you can put a plug in the through hull from below and do this in the water, but if you have never done it before you'll probably feel much more comfortable on dry land.
[Edit] Also, the bend (elbow) looks like it might be galvanized steel (hard to tell from the photo), and could be weeping as a sign that it is almost eaten away, when you service you will likely want to have a new one on hand, and preferably also bronze so you don't have to worry about it for the next 40 years.
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14-01-2025, 09:32
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#3
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Registered User
Join Date: Nov 2018
Location: North Germany
Boat: 29 ft
Posts: 281
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Re: 2" 1980? seacock & bend, anyone knows which and how to replace bend and service v
What PippaB wrote. And do not wait much longer. If the elbow should be severely corroded on the inside already, you might be able already to break it off by hand ... (don't try that until you are prepared to change it),
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14-01-2025, 09:50
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#4
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Registered User
Join Date: Jul 2023
Location: Norway (south/west coast)
Boat: Stadel (Mariner) 48
Posts: 11
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Re: 2" 1980? seacock & bend, anyone knows which and how to replace bend and service v
Thanks, great, :-) .... Maybe I can keep the through hull then :-) .... Need to order a new bend of the same material then.
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Finn @ 20 tons of 1980 48" GRP Ketch
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14-01-2025, 10:04
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#5
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Registered User
Join Date: Oct 2014
Location: Charleston, SC
Boat: Pearson 424
Posts: 229
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Re: 2" 1980? seacock & bend, anyone knows which and how to replace bend and service v
Also, hard to tell from the picture but it looks like the hose clamps have corroded to the point where the straps may be totally gone. The hose looks to be delaminating as well. This might be where the leak is coming from. If that’s the case I’d get some new clamps on there even if just for temporary until you can address the seacock issue.
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14-01-2025, 10:06
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#6
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Registered User
Join Date: Aug 2021
Location: PNW
Boat: 35 Ft. cutter, custom
Posts: 2,929
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Re: 2" 1980? seacock & bend, anyone knows which and how to replace bend and service v
Try as I might, that brand of seacock escapes me at the moment, but while it surely is a tapered plug device it's not a Spartan brand.
The handle is the give-away, non-removable and wrong shape.
As to the elbow? It appears to be a swivel 90 adaptor.
Spartan does make them but they're quite spendy.
However, they're about the only product that can cancel out Murphy's Law, which states that a screwed-on fitting will never point in the direction you wish.
https://www.spartanmarine.com/all-pr...adapters-parts
Edit: just noticed "Mariner 48", that seacock is probably a Tiawan produced product.
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Beginning to Prepare to Commence
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14-01-2025, 12:25
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#7
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Registered User

Join Date: May 2011
Location: Miami Florida
Boat: Ellis Flybridge 28
Posts: 4,078
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Re: 2" 1980? seacock & bend, anyone knows which and how to replace bend and service v
Pretty sure the seacock is the less expensive Wilcox-Crittenden. Good seacock. It should probably be removed , disassembled and cleaned up. What’s wrong with the bend, called a tailpiece? Groco makes them still.
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14-01-2025, 12:36
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#8
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Moderator
Join Date: Mar 2008
Location: Rhode Island/Florida USA
Posts: 3,372
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Re: 2" 1980? seacock & bend, anyone knows which and how to replace bend and service v
Quote:
Originally Posted by HopCar
Pretty sure the seacock is the less expensive Wilcox-Crittenden.
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I agree.
Hopefully this is helpful as well
https://marinehowto.com/servicing-ta...cone-seacocks/
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14-01-2025, 12:58
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#9
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Registered User
Join Date: Aug 2021
Location: PNW
Boat: 35 Ft. cutter, custom
Posts: 2,929
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Re: 2" 1980? seacock & bend, anyone knows which and how to replace bend and service v
Perhaps someone can find a picture of one, but I can't remember ever seeing a 2" seacock from Wilcox-Crittenden or Groco that had a non-removable curved handle such as the one the OPs pic shows.
Nor having the solid cast raised boss where WC or Groco would have a removable drain plug.
Be that as it may, the 90 elbow appears suspect, however, the location of the "white" deposit, (on the downhill side,) leads to suspicion that the rubber washer under the swivel nut has been leaking, (the old "standard" ones were of leather).
And yes, Groco does make a swivel 90 tailpiece, but hasn't made a male thread seacock that will accept that tailpiece since the '90s.
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Beginning to Prepare to Commence
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14-01-2025, 13:59
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#10
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Registered User
Join Date: Jul 2023
Location: Norway (south/west coast)
Boat: Stadel (Mariner) 48
Posts: 11
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Re: 2" 1980? seacock & bend, anyone knows which and how to replace bend and service v
Thanks again everyone,...... now I have names to google and that makes a huge difference,..... also the link was of huge help to understand what I'm up against and how to possibly aproach it. (Will for sure be on the hard though).
Yes, it's a Mariner from Taiwan, initially sold in the US.
2" is just an asumption on my side, I haven't measured it, so I could be wrong there.
Regarding drain plug, It's not showing on that picutre, but behind and below the elbow there's a bolt that looks like it can be screwed out (simmilar location to what you mention (just opposite)) (Like it's moulded on both sides but only drilled up on one side).
I'm thinking about first trying to service it in place, as if I try to wrench it off from the through hull, they might not want to separate, and I might end up with a spinning through hull ? (I found a picture on ebay, seems there's no bolts, only the through hull)
I'm in the planning / ordering stage now, will be some months before I give it a try (she's still in her berth).
As of elbow it seems Groco as some has mentioned is what is obtainable, and of 85-5-5-5, so let's hope they have matching threads then :-) ......
From house plumming I'm used to using flax (and paste) on the threads, assuming that's o.k. on boats as well, gives me more control of what angle it ends up at ;-).
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Finn @ 20 tons of 1980 48" GRP Ketch
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