Air enters because incorrectly designed, thread too long, so shaky and not lufdicht Finally, as soon as the pressure increases the air exits laterally between gun and hose adapter.
In 30 minutes with 2 different Einhell hotline people to 14 cents on the phone the minute, one because the thing has to be broken so if it does not work less competent than the other, with the success that I should fax the invoice. But is not broken, is just at the outset scrap.
Hands off !!