A bit quiet when filling the canister, but ok, since the vent is located near the filler neck. Great with column fueling. Somewhat sharp, was reground; Installation in the hose required heating of the same. But also tight!
Since the whistle is on the opposite side of the tank filler neck, the possible whistling when refueling is drowned out by the gas pump pump.\r\nI wouldn't have expected that.
Unfortunately, the whistle only has connections for 16mm hose. But we did not mention this in the product description. Therefore, not usable with me. Returns easily, but with a neat description that would not have been necessary.