In older houses like mine water
pressure is not sufficient to do
pressure critical things all at once.
The chief example is when one
person is showering: any other
will upset the balance in the hot and
cold water. Scalding or chilling the
person in the shower.
Now you could,
I suppose, hook up
some pressure increaser or any of
the lovely antiscald devices, but that
asking for trouble, the pipes might
not take it and there you are with
cartoon-style spraying leaks all over
the house and some 'splainin' to do
to the spouse and the after-hours
Instead you use the YO! light. A
pressure switch (like the oil
sender from my 1969 VW Bug but
adjustable) is introduced into the
system and when the pressure
(as in when an appliance is using it
someone is in the shower) it sends
simple radio signal.
The receivers are sealed plastic
with red LED's that go on when the
pressure drops. Occasionally a
light comes on to say it needs to be
recharged in the induction charger.
But this is infrequent since the LED
a low power draw and there is no
button or flashing etc.
How to use:
You can either wear the plastic ring
around your wrist (overkill but if
regularly scald your loved ones it is
small price to pay) or just drop the
rings over the kitchen spout or any
tap handles that might tempt one.
Just put them wherever it would
be seen before turning the handle.
For instance: when at the kitchen
you reach for the handle, see the
light and you think...
That's the back garden's timed
sprinklers, no big deal, I can turn
That's the dishwasher, it is stupid
and will run poorly with less water,
That's the Fembot, I'm not sure
That's the brother-in-law, time to
the toilet lever NOW.
The advantages as I see them
Minimal invasion to the plumbing
No risk of overpressure for an old
User can still override (for whatever