It doesn't look like it matters.  The ABC designators are just different
manufacturing techniques, the dimensions are standard.

https://www.pexuniverse.com/content/types-of-pex-tubing

I would suggest that despite being able to be bent to reach and articulate
between source and destination, in the boat you'll want to use elbows to
change direction.

Josh Muckley
S/V Sea Hawk
1989 C&C 37+
Solomons, MD



On Dec 12, 2017 1:56 PM, "Jim Reinardy via CnC-List" <cnc-list@cnc-list.com>
wrote:

This thread helped me out too.  I am starting to plan for the slow
replacement of the Qest in my boat with PEX as I have plumbing projects.  I
have a water tank that appears to have a clog either in the outlet pipe or
in the tank, that might be a good starter project.  One question though.
Does it matter which PEX is used with Flair-It for marine applications?  I
notice that the Flair-It company sells both A and B types, but I don't
really know what the difference is on a boat.  Thanks for any advice on
this.

Jim Reinardy
C&C 30-2 "Firewater"
Milwaukee, WI


--------- Original Message ---------
Subject: Re: Stus-List New Lister - Need Help Identifying Water System
Fitting Type - C&C 36 1981
From: "Tim Rutherford via CnC-List" <cnc-list@cnc-list.com>
Date: 12/12/17 10:02 am
To: cnc-list@cnc-list.com
Cc: "Tim Rutherford" <tim.rutherford.m...@gmail.com>

A few simple words, Qest/Zurn/Flair-It, and now I'm off in the right
direction! Thanks for sharing your experiences and recommendations.

 --
Tim Rutherford
C&C 36' - #244
Chamamé
tim.rutherford.m...@gmail.com
Cell/text 813-748-4888 <(813)%20748-4888>

On Mon, Dec 11, 2017 at 4:45 PM, Josh Muckley via CnC-List <
cnc-list@cnc-list.com> wrote:

> Qest was made by Zurn out of polybutylene plastic.  The fittings have some
> great advantages including the ability to assemble/disassemble without
> tools and freeze resistance.  The problem is that chlorine has the effect
> of degrading the plastic and making it brittle.  You'll probably notice
> that the areas in contact with the water are white.  The plastic wasn't
> made that way is was bleached.  There was a class action law suit against
> Zurn.  Zurn is now the current maker of PEX which IIRC is made from HDPE
> and is not compatible with Qest in any way.
>
> Josh Muckley
> S/V Sea Hawk
> 1989 C&C 37+
> Solomons, MD
>
>
>
> On Mon, Dec 11, 2017, 3:59 PM Tim Rutherford via CnC-List <
> cnc-list@cnc-list.com> wrote:
>
>>
>> Newbie here. Bought my first keelboat in June of this year, a 1981 C&C
>> 36' with a centerboard. These boats are highly regarded in this area and
>> personally, I absolutely love mine. Been racing other-people's-boats and
>> bareboat cruising  in Tampa Bay and the Caribbean for decades. I am a
>> member of the Davis Island Yacht Club. I am an electrical engineer with
>> specialty in automation and controls and I work with a Florida electric
>> cooperative utility. Joined the database and this list just a few weeks ago.
>>
>> Looking for a source of a replacement parts for the pressurized water
>> system tubing & fittings. One of compression nuts is cracked. The elbow
>> fitting on the vent line shown in the photo is the type in question
>> although the broken nut is elsewhere. I also wonder if the ferrule and
>> back-up ring can be removed and replaced, or if it must be cut off and
>> replaced with a new one.
>>
>> https://drive.google.com/open?id=0B5A2zIupq2XBbHhyLWRRcGhXSXRpe
>> G9oVlVlY0FTRjhndEdj
>>
>> The line size is 1/2" O.D. X 3/8" I.D. and the tubing is made of an
>> unknown type of hard gray plastic. It doesn't appear to have any markings.
>>
>> Any help is appreciated.
>>
>>  --
>> Tim Rutherford
>> Chamamé
>> C&C 36' - #244
>> tim.rutherford.m...@gmail.com
>> Cell/text 813-748-4888 <(813)%20748-4888>
>> _______________________________________________
>>
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>>
> _______________________________________________
>
> Thanks everyone for supporting this list with your contributions.  Each
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