by SaltLakeJan on Fri Nov 20, 2009 9:06 pm
Howja do dat?
I purchased a couple of 12" lengths of 4mm ID x 5mm OD styrene tubing at the local hobby store. Even found a transparent blue which matches the Breeze shell. Cost ~ $2.50. Cut 1 piece to approx 6" length. Stuffed the tubing with piece of wire to prevent collapse when bending. Wire was from dead USB charger. Important thing is that the stuffing be tight. Heated middle of tube length with heat gun and let gravity provide the necessary bending force. Trimmed tube to look like this:
Applied soap and water and forced tube into exhaust port :
It's easier to do this with the exhaust port installed in the plenum shell. Another view of the result:
I also tried this with a 5mm ID x 6mm OD tube, but didn't find any appreciable reduction in air resistance when plugging plenum the inlet and breathing through the mask, and it took a great deal of force to insert the larger tube. Before anyone screams about plugging the exhaust port, please note that the hole in the stock rubber port is stepped, the diameter of the port is larger on the inside than the outside, and the tube stretches the outside portion while fitting comfortably within the much larger inside portion. In any event, I've been using this for a month at 8 - 12 pressure with no signs of CO2 poisoning.
