I've never never seen one here in The States. (Under the sink above the
If you really need a supply-pipe drain, a better location it seems, would be
at the lowest point on the pipe. You might have to shut off the water main
to drain the pipe, but big deal.
What a weird rule, I'm glad we aren't the only ones who come up with weird
rules like that. <G>
I've done many plumbing projects and the only time I've drained the water
line is if I'm going to disconnect anything low in the system where there is
significant water above, or if I'm going to be soldering. What little there
is above the shut-off valve under the sink is barely anything.
Cut that thing out if it's necessary for your project... you nor anybody
else will NEED it ever.
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