[EBH]

I remember ready in one of the safety magazines I get from the ASSE one of the problems was all the different manufactures of masks and not having enough of the right fitting cartridges for the masks. Each manufacture has a unique mechanism so you're stuck using only their cartridge. They are not interchangeable.

I believe this was discussed and was going to be changed? But, I don't recall it ever having happened.

[EBH]

ready= reading.

sheesh

[Restorer]

Respirator manufacturers still, for the most part, do not use interchangeable cartridges. This is because they often sell the respirators at or below cost, even give them away, on the assumption that they'll more than make it back over time on the high-markup cartridges. If cartridges were interchangeable, this approach wouldn't work.

Same economics play out in the purchase of inkjet printers.