- Oct 30, 2016
- 1,668
- 3,409
- Funster No
- 45,854
- MH
- Hymer BMC t780
- Exp
- On 4th van so not a total newbie....
Noticed that and when they tipped it up looked like a dribble of neat blue came out, so obviously empty and set up for filming.And you just press the button once with the cap screwed on and it "releases the air".................