In order to extend the durability of the valve and to avoid any jamming or malfunction of your airgun we recommend to exclusively use Umarex or Walther CO2 capsules with it. Other manufacturers have different size tolerances which might cause blocking of the airgun or their capsules have a burr at the top end which could destroy the seal.

In addition, not all manufacturers have the CO2 gas filtered before filling it into the capsules. This will cause an increased soiling of the valve which could also lead to a dysfunction of the airgun.