Dick Adams wrote:
Percival P. Cassidy wrote:

I have lived both in Australia and in Taiwan. In both
countries, bathroom floors had drains to avoid serious
flooding in the case of overflows. ..

Why have I never encountered such in US bathrooms?

When I was in OZ last year, I was surprised to see these
drains in the floor. But none of the showers had doors,
just pull around curtains. Did not see a bathtub in any
house or motel.

My bathtubs and my sinks have overflow valves and there's
a plunger next to every toilet.

Also in the States, most county/city plumbing codes does
not allow waste water to be dumped on to the ground.

Dick
Hi,
Sink has over flow? Not any more here. Specially in the hospitals.
They don't wnat dirty water coming back up.