Choose Options Quick view Salter Labs Bubble Humidifier 350cc, Dry, with 3 PSI Safety Pop-off Alarm $119.08 350cc bubble humidifier.Dome lid eliminates rain-out, pvc material resists clogging, inlet nipple, stem & diffuser are permanently bonded into a single unit, safety pop-off alarm and large durable wing nut won't cross thread. Compare Choose Options Add to Wishlist