Ive tried all sorts of stuff...
if it washes well.... then its too stiff.
If it flexes well... it tastes bad.
My wife is a nurse... I'll have her bring some of this home to try soon.
its called CPAP tubing. and comes in up to 6 foot sections. Its used for respiratory care applications.
► CPAP tubing constructed from a metallocene plastomer wall with thermoplastic elastomer cuffs.
► CPAP tubing cuffs are sized to fit 22mm male connections
► Helical wall support design prevents collapsing while the smooth interior offers excellent unobstructed flow characteristics
► Can be pasteurized at 170°F (75°C)
► CPAP tubing is Latex Free
► Lightweight and cost effective alternative to silicone cuff CPAP tubing
► Constructed from materials complying with FDA 21 CFG177.1520
► Full Biocompatibility Testing per ISO 10993/FDA - Test Data available
I know.. thats kinda wrong.... but if they use the stuff for vapor treatment and nebulizers and shit..... gotta work for us too.
22mm is right around 7/8 of an inch..... I imagine you could cut the ends off if you needed to ditch em?