How does a 16g threaded cartridge compare to an 8g or 16g smooth‑neck charger for soda water? The key difference is the connection type, not just the gas amount. However, here is how they compare functionally: | Feature | 16g Threaded CO₂ | 16g Smooth‑Neck CO₂ | 8g Smooth‑Neck CO₂ | | Total gas | 16 grams | 16 grams | 8 grams | | Water carbonation per cartridge | ~1.5–2 liters | ~1.5–2 liters | ~0.8–1 liter | | Common use | Specialized siphons, adapters | Standard soda siphons, some soda makers | Small soda siphons, travel devices | Important safety note: Because the threaded cartridge screws in and forms a metal‑on‑metal or washer‑based seal, you must not overtighten it. Over‑tightening can strip the threads on either the cartridge or the device, ruining both. Most threaded systems require only finger‑tight plus a quarter turn — never use tools. https://www.rotasswhip.com/16g-threaded-co2-cartridge