Galley Sink Drain Reducer

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Catalina007


I need to transition from the standard 1 1/2 inch
sink tail (male  screw) down to a 3/4 inch hose which
drains to my thru hull.  I have been up and down the
Aisles at HDX and Lowe's. No luck.
Any tips?
It looks like the prior owner used some sort of cut off funnel

Ron Hill

#1
OO7 : I've seen and used a "rubberized" adapter that has numerous step downs in its length and you cutoff the piece with the diameters you want!
Thought it may have been Lowe's or Home Depot?  Maybe it was a plumbing store??, but that type adapter is out there!

A thought
Ron, Apache #788

Catalina007

They are as easy to find as a Governor Cuomo confession!

lazybone

Quote from: Catalina007 on August 04, 2021, 02:49:41 PM
They are as easy to find as a Governor Cuomo confession!

He's Italian.
We use our hands to express ourselves.
Ciao tutti


S/V LAZYBONES  #677

jonathanc34

#4
I used these: https://smile.amazon.com/Forespar-Drain-Degree-Plastic-Flange/dp/B0942NDKB8

The upper piece goes between the drain and the tailpiece nut, and the lower part threads over the top part.

Gives you 1" hose barb. I used 1" hose and a marelon 1" barb to 3/4" npt at the seacock because it has a large opening all the way through, larger than the bronze groco equivalent. Used a 1" wye to combine the two sinks' 1" hoses.

My drains are so fast.
'Owenoke' 1988 C34 Hull 548 Tall/Wing M-25XP
Worton Creek Marina, MD

She'll make .5 past 6 knots. She may not look like much, but she's got it where it counts. (I've added some special modifications myself.)

Ron Hill

007 & Lazy : Maybe we shouldn't stray quite so far from the topic! 
Ron, Apache #788

Stu Jackson

Stu Jackson, C34 IA Secretary, #224 1986, "Aquavite"  Cowichan Bay, BC  Maple Bay Marina  SR/FK, M25, Rocna 10 (22#) (NZ model)

"There is no problem so great that it can't be solved."

KWKloeber

Twenty years from now you'll be more disappointed by the things you didn't do, than by the ones you did.
So throw off the bowlines.  Sail away from the safe harbor.  Catch the tradewinds in your sails.
Explore.  Dream.  Discover.   -Mark Twain

KWKloeber

Quote from: jonathanc34 on August 04, 2021, 04:31:56 PM

I used 1" hose and a marelon 1" barb to 3/4" npt at the seacock because it has a large opening all the way through


Just to be precise it must be something else -- Forespar doesn't manufacture a 1" x 3/4" NPT Marleon hose barb.  Nor a 1" x 3/4" tailpipe (w/ straight thread to fit the valve.)   At least in the most-recent catalog that I saw.
There ARE suitable glass-reinforced-polyethylene hose barbs available (1" x 3/4" NPT.)
But one should never, ever, use a pvc (gray) hose barb below the waterline.
Twenty years from now you'll be more disappointed by the things you didn't do, than by the ones you did.
So throw off the bowlines.  Sail away from the safe harbor.  Catch the tradewinds in your sails.
Explore.  Dream.  Discover.   -Mark Twain

Catalina007

#9
Valterra T01-0091VP Swivel Drain Connector - 90°, 1-1/2" x 3/4", Black https:/
Here is another with 3/4 npt.

https://www.walmart.com/ip/Valterra-T01-0091VP-Swivel-Drain-Connector-90-1-1-2-x-3-4/119451092


KWKloeber

Here's a direct-to-1" adapter

Ambassador Marine Hose Barb Adapter Fits 3/4-Inch and 1-Inch Hose Barb
https://www.amazon.com/dp/B00GD8RTL6

Just cut off the 3/4" barb.
Twenty years from now you'll be more disappointed by the things you didn't do, than by the ones you did.
So throw off the bowlines.  Sail away from the safe harbor.  Catch the tradewinds in your sails.
Explore.  Dream.  Discover.   -Mark Twain

jonathanc34

#11
Quote from: KWKloeber on August 04, 2021, 11:48:02 PM
Quote from: jonathanc34 on August 04, 2021, 04:31:56 PM

I used 1" hose and a marelon 1" barb to 3/4" npt at the seacock because it has a large opening all the way through


Just to be precise it must be something else -- Forespar doesn't manufacture a 1" x 3/4" NPT Marleon hose barb.  Nor a 1" x 3/4" tailpipe (w/ straight thread to fit the valve.)

Right here: https://shop.hamiltonmarine.com/products/pipe-to-hose-marelon-tailpipe-44618.html
And here: https://www.fisheriessupply.com/forespar-tailpipes-hose-adapters-tapered-pipe-threads/910160
And here: https://www.forespar.com/product635.html

FOR-910160
'Owenoke' 1988 C34 Hull 548 Tall/Wing M-25XP
Worton Creek Marina, MD

She'll make .5 past 6 knots. She may not look like much, but she's got it where it counts. (I've added some special modifications myself.)

Catalina007


KWKloeber

#13
@jc34

Thank you for those links- I'm going to bookmark them.
Very odd, I've searched for that size and they're not listed on the forespar site on their plumbing parts (attached)

Thx!
Twenty years from now you'll be more disappointed by the things you didn't do, than by the ones you did.
So throw off the bowlines.  Sail away from the safe harbor.  Catch the tradewinds in your sails.
Explore.  Dream.  Discover.   -Mark Twain

Paulus

#14
Have you given any thought to putting in a larger thru hull?
Paul
Cool Change 1989 #944