[Public-list] Original gatevalve sizes

[Gordon Laco]

Hi Jack - 

I am in the middle of that job now.  I got a note from my marine insurer
that this year I need a survey so decided to bite the bullet and change over
from gate valves to ball valves.  Fairly horrible miserable job esp the
cockpit drains and the scupper hoses... Besides the little flim flam with
the changing diameter, we found that the ball cocks are taller than the gate
valves.  What that meant was cutting the longitudinal bulkhead to allow the
scupper hoses to come in at the right angle.  Then came the ordeal of trying
to push the hoses onto the new hose barbs while upside down in the cockpit
lockers, with wet snow falling on us.. Etc etc

But, the job had to be done.

Here is what was in my #426:

Engine cooling intake - 1/2"

Cockpit drains - 1" through hulls, but 1 1/4" hoses (did you hear cursing
coming from the north the day I discovered that?)

Sink intake - was 3/8", I changed it to 1/2" (that one was one of those
'fake' through hulls Whitby used and I changed it)

Sink drain - 1" and I kept to that size

Head intake - was 3/8" and we went to 1/2"

Head overboard... Being a Great Lakes boat we don't have one of those.

Cheers - Gord #426 Suprise



> Has anyone gone through a recent gate-valve to ball-valve/seacock
> conversion, i.e., from the original gate-valves on a liner-vintage A30
> (1977, 1978)?
> 
> My boat is about 500km/300mi from home, so I'd like to document the
> existing arrangement for planning/costing purposes while the water is
> still hard.
> 
> Aside from the engine discharge, what are the nominal sizes of the
> following original GATE-valves:
> Cockpit/deck drains
> Engine cooling intake
> Sink intake
> Sink discharge
> Heads intake
> Heads overboard discharge
> 
> Thanks
> 
> Jack
> Aldabi KC641
> 
> 
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