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Subject: Re: [worldcruising] Sea Cocks
From: Bob Taylor (bobt@XXX.XXX)
Date: Thu Jan 11 2001 - 15:06:26 EST
Hi
While not a scientific study for sure I have used Marelon for a long time. The
first ones in a boat that doe not belong to me any more. I am friends with the
current owner and know the valves are in good shape after about 18 years.
One note here. I heard a story about "plastic valves that broke and caused a
sinking. When I questioned the owner he said the valves had stainless bolts
holding them together. These valves were produced a while back and I think
were not glass reinforced nylon. They were not the Marelon brand. I wonder
how much of the bad rap plastic valves get is due to these and other cheep
plastic valves used on boats. I have seen the PVC ball valves sold at Home
Depot used on one boat in our marina mounted on a plastic through hull.
Bob sv Adagio
Jim Manzari wrote:
<snip>
> I've heard this recommendation often. I've wondered, however, if anyone
> can provide official numbers for the amount of water absorption with age in
> marelon? Does marelon expand when water is absorbed into the plastic?
> Does marelon retain its strength with age?
>
> Jim Manzari
>
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