Standard size drain hose for sinks

[crazy charlie]

I am wanting to replace my sink drain thru hull with a stainless thru hull.Does anyone know the standard size? Both my bathroom and kitchen look to be about an inch.Charlie

 

[dingbat]

I am wanting to replace my sink drain thru hull with a stainless thru hull.Does anyone know the standard size? Both my bathroom and kitchen look to be about an inch.Charlie

No standard size or connection type (hose barb verse threaded).
I have 5 different size and hose connections on my boat.
No stainless below the water line.

 

[McBride538]

Some older sinks may have drains that connect to a 1 1/4-inch tailpiece, but most modern drains have a 1 1/2-inch outlet. All the pipes that connect to the tailpiece, including the P-trap assembly and all the horizontal extensions, are either 1 1/4 or 1 1/2 inches in diameter.

 

[Scott Danforth]

Some older sinks may have drains that connect to a 1 1/4-inch tailpiece, but most modern drains have a 1 1/2-inch outlet. All the pipes that connect to the tailpiece, including the P-trap assembly and all the horizontal extensions, are either 1 1/4 or 1 1/2 inches in diameter.

you are confusing residential with marine