Posted by fgljff (fgljff@…>)
The head overboard discharge seacock on my F25 is a Perko. The hose is standard
marine
head discharge 1.5" ID. Thus, the tailpiece fitting on the seacock has a 1.5" OD
barb. But
here’s the strange part: I measured the other end of the fitting, where it
screws into the
seacock, and it’s 1.75". Can that be right? I’ve never heard of a fitting like
that. My plan is to
remove the y-valve, and use the overboard discharge thru-hull for a deck wash
intake.
Posted by Herman and Gail Schiller (hschiller2@…>)
I assume that the threaded portion of the thru-hull is 1.75" , and
that screws in to the seacock, and its internal dimension is 1.50" .
Does this make sense? Plumbing is MYSTERIOUS. Herm
At 04:40 PM 1/4/2007, you wrote:
The head overboard discharge seacock on my F25 is a Perko. The hose
is standard marine
head discharge 1.5" ID. Thus, the tailpiece fitting on the seacock
has a 1.5" OD barb. But
here’s the strange part: I measured the other end of the fitting,
where it screws into the
seacock, and it’s 1.75". Can that be right? I’ve never heard of a
fitting like that. My plan is to
remove the y-valve, and use the overboard discharge thru-hull for a
deck wash intake.
Attachment: (image/jpeg) 7d7eb5.jpg [not stored]
Posted by Lorman, Alvin J. (ajlorman@…>)
I don’t know about this particular fitting, but hose barbs and NPS (pipe) fittings are measured entirely differently. A barb’s size is the inside diameter of the hose you’ll put on it. NPS sizing has always mystified me and is not one for one with the actual size. The plumbing section of the McMaster Carr catalog has a chart showing actual sizes v. NPS sizes.
Al Lorman
F30 Ab Initio
-----Original Message-----From: freedomyachts2003@yahoogroups.com [mailto:freedomyachts2003@yahoogroups.com] On Behalf Of Herman and Gail SchillerSent: Thursday, January 04, 2007 5:40 PMTo: freedomyachts2003@yahoogroups.comSubject: Re: [freedomyachts2003] perko seacock
I assume that the threaded portion of the thru-hull is 1.75" , and that screws in to the seacock, and its internal dimension is 1.50" .Does this make sense? Plumbing is MYSTERIOUS. HermAt 04:40 PM 1/4/2007, you wrote:>The head overboard discharge seacock on my F25 is a Perko. The hose >is standard marine>head discharge 1.5" ID. Thus, the tailpiece fitting on the seacock >has a 1.5" OD barb. But>here’s the strange part: I measured the other end of the fitting, >where it screws into the>seacock, and it’s 1.75". Can that be right? I’ve never heard of a >fitting like that. My plan is to>remove the y-valve, and use the overboard discharge thru-hull for a >deck wash intake.>>
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Posted by fgljff (fgljff@…>)
Yes, that’s the problem. I looked it up and the NPT sizes are actually quite
nominal. I found
that 1.5" NPT actually has a thread size of 1.9" (close to what I measured). So
a 1.5 NPT
and a 1.5 barb have quite different diameters, but are both considered nominal
1.5"s!
— In freedomyachts2003@yahoogroups.com, “Lorman, Alvin J.” <ajlorman@…>
wrote:
I don’t know about this particular fitting, but hose barbs and NPS
(pipe) fittings are measured entirely differently. A barb’s size is the
inside diameter of the hose you’ll put on it. NPS sizing has always
mystified me and is not one for one with the actual size. The plumbing
section of the McMaster Carr catalog has a chart showing actual sizes v.
NPS sizes.Al Lorman
F30 Ab Initio-----Original Message-----
From: freedomyachts2003@yahoogroups.com
[mailto:freedomyachts2003@yahoogroups.com] On Behalf Of Herman and Gail
Schiller
Sent: Thursday, January 04, 2007 5:40 PM
To: freedomyachts2003@yahoogroups.com
Subject: Re: [freedomyachts2003] perko seacockI assume that the threaded portion of the thru-hull is 1.75" , and
that screws in to the seacock, and its internal dimension is 1.50" .
Does this make sense? Plumbing is MYSTERIOUS. HermAt 04:40 PM 1/4/2007, you wrote:
The head overboard discharge seacock on my F25 is a Perko. The hose
is standard marine
head discharge 1.5" ID. Thus, the tailpiece fitting on the seacock
has a 1.5" OD barb. But
here’s the strange part: I measured the other end of the fitting,
where it screws into the
seacock, and it’s 1.75". Can that be right? I’ve never heard of a
fitting like that. My plan is to
remove the y-valve, and use the overboard discharge thru-hull for a
deck wash intake.IRS CIRCULAR 230 NOTICE. Any advice expressed above as to tax matters was
neither
written nor intended by the sender or Mayer, Brown, Rowe & Maw LLP to be used
and
cannot be used by any taxpayer for the purpose of avoiding tax penalties that
may be
imposed under U.S. tax law. If any person uses or refers to any such tax advice
in
promoting, marketing or recommending a partnership or other entity, investment
plan or
arrangement to any taxpayer, then (i) the advice was written to support the
promotion or
marketing (by a person other than Mayer, Brown, Rowe & Maw LLP) of that
transaction or
matter, and (ii) such taxpayers should seek advice based on the taxpayers
particular
circumstances from an independent tax advisor.This email and any files transmitted with it are intended solely for the use
of the
individual or entity to whom they are addressed. If you have received this email
in error
please notify the system manager. If you are not the named addressee you should
not
disseminate, distribute or copy this e-mail.