working with plastics et.c. If you're indoors, shove
the end of the hose out a window. If you're outdoors
do the opposite. Instructions: Reverse one of the exhale
membranes and fit it with a 1" vacuum cleaner hose,
preferably one that's not previously been used for vacuum cleaning.
Block the original port for entering air with a suitable plug.
Bicycle hose of the right diameter is a good transition
from the mask to the hose. The end of the hose is fitted
with some mesh just in case small animals feel tempted.
Make absolutely sure all exhaled air exits through
the exhale membrane and not back the hose. Also make
sure breathing resistance doesn't get too big.
I would not advice anyone to use this gear for diving.
