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Posted by EXT on October 30, 2007, 9:16 am
Type M and Type L have the same outside diameter, just the wall thickness
changes. I have never seen a valve or fitting with a smaller diameter unless
it is intended for pipe other than standard nominal 1/2 copper tubing.
"Mortimer Schnerd, RN" <mschnerdatcarolina.rr.com> wrote in message
> With the first freeze of the year last night, I crawled under the house to
> shut off the water to the back deck and blow out the line with some
> compressed air. Imagine my disgust when I discovered the plumber had
> installed the quarter turn valve with the access port to the inside of the
> house rather than outboard of the other seat/stem type valve. In other
> words, introducing compressed air to the valve would blow the water inside
> the house up until that point rather than the water from that point
> outside.
>
> So what to do? I cut the line with a tubing cutter and was going to
> solder in another ported quarter turn valve... only this time to the
> outside of the water line shutoff. When I tried to fit the valve on the
> now open piping, no amount of stuffing and grunting would get the job
> done. A visit to the local borg revealed plenty of 1/2" fittings, only
> they would fit the thinner M type piping. I assume I've got L tubing which
> is just a little thicker.
>
> Where do I get valves that would fit? Or should I find some sort of
> reducer (seems like more work than I want to do)? And why don't the borgs
> sell valves that fit the tubing they sell? They've got both kinds of
> tubing but just the smaller diameter valves. The immediate problem is
> solved: I blew out the line under the deck after I cut it under the
> house. But I won't have more water out there until I repair this.
>
> Gents?
>
>
>
> --
> Mortimer Schnerd, RN
> mschnerdatcarolina.rr.com
>
>
>
>
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