Bosch WFVC VISION 16 Repair Instructions page 22

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4.3.2 AQUASTOP (aqua secure) hose operation
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The AQUASTOP hose consists of a sealed inner and outer hose and
a leak detection / shut-off assembly.
allowing the inner hose to carry water. If an inner hose ever should
leak, water fills the outer hose where a sponge in the hose end
(connected to the water line) absorbs water, pulling a plunger down to
stop water flow and show red
is sealed and won't leak.
Any remaining water pressure won't re-open the hose, but will help
keep the hose closed.
702_58300000143607_ara_en_a
A spring holds a plunger open
in the indicator window. The outer hose
The hose has a one-time failure duty. If an inner hose should ever
leak where the indicator shows red, the hose must be replaced.
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AQUASTOP hoses stop hose leaks, whether appliances are on or
not. They're superior to braided hoses, whether nylon or ss, and can
be used with any washer (or misting dryer) with standard US threads
(3/4" NH, 11.5 threads/inch).
Plunger
Sponge
Indicator
window
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