Head sink seacock

Angel D.

Member II
Quick question to all you Vikings out here , hull out list is almoust ready but have a question on the marlon valve on the sink . I think is one inch or above. Will please someone share some light on the matter , tread is NPS ? Size ?

Ericson 381 1984

Thanks in advance fellows !
 

Prairie Schooner

Jeff & Donna, E35-3 purchased 7/21
Quick question to all you Vikings out here , hull out list is almoust ready but have a question on the marlon valve on the sink . I think is one inch or above. Will please someone share some light on the matter , tread is NPS ? Size ?

Ericson 381 1984

Thanks in advance fellows !
Many (all?) of the Marelon fittings are straight thread. Sorry Angel, I don't remember the size.
 

Kenneth K

1985 32-3, Puget Sound
Blogs Author
On the 32-3, the sink drain and toilet intake share a 3/4" Forespar 850 ball valve. All the waste thru-hulls are 1.25". Yeah, the Forespar threads are NPS.
20160920_160813.jpg 20160817_191716.jpg
 
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peaman

Sustaining Member
On the 32-3, the sink drain and toilet intake share a 3/4" Forespar 850 ball valve.
My 1987 32-3 has separate through hull valves for head sink drain and toilet flush water intake. I assume that is as originally built. I cannot report sizes, but the intake may well be 3/4", and I'm sure the sink drain is larger.
 

Kenneth K

1985 32-3, Puget Sound
Blogs Author
My 1987 32-3 has separate through hull valves for head sink drain and toilet flush water intake.
I'd like to see where they located the second intake.

The single intake thru-hull requires a tee, which isn't optimal, but it does allow you to flush with sink water, or to winterize the head by pouring antifreeze into the sink.
 

Angel D.

Member II
My 1987 32-3 has separate through hull valves for head sink drain and toilet flush water intake. I assume that is as originally built. I cannot report sizes, but the intake may well be 3/4", and I'm sure the sink drain is larger.
Thanks guys .It does look the same here. Flush hose is 3/4" and Sink hose is larger 1-1/8" . And the seacocks look different in size. I think I'll take off the nipple and caliper measure the valve itself.
I'll keep a wood plug nearby :)
 

Angel D.

Member II
Hello friends, turns out that E381-1984 head sink is a 1in. Seacock. Figure it out by measure of the treads at the nipple . IMG_20250605_081506374.jpg
Choice of replacing with a Gemlux True design seacock due to a humble sailor Budget and great reviews on the product.

Hope that you all are well .

A. Adames
 

gabriel

Live free or die hard
Hello friends, turns out that E381-1984 head sink is a 1in. Seacock. Figure it out by measure of the treads at the nipple . View attachment 53024
Choice of replacing with a Gemlux True design seacock due to a humble sailor Budget and great reviews on the product.

Hope that you all are well .

A. Adames
What is the measurement of the inside diameter (ID)?
 

peaman

Sustaining Member
I'd like to see where they located the second intake.

The single intake thru-hull requires a tee, which isn't optimal, but it does allow you to flush with sink water, or to winterize the head by pouring antifreeze into the sink.
The flush intake is lowest, just inside the vanity door. The overboard discharge is a few inches to port, and the sink drain thru hull is a few inches farther to port. The sink drain hose looks to be 1” I.d. The thin black hose is for shower/faucet.


IMG_0462.jpeg
 

Nick J

Contributing Partner
Moderator
Blogs Author
Here's some info from Forespar's website. Page 8 of the catalog has a table for the 850 ball valves. Looks like the thread size and valve size are the same.

 
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