this test will only apply if your bottle is in breathing air colours if you have a differant colour bottle(mines blue) with not breathing air on it then the test is every ten years the same as buddy bottles fitted toa number of differant air rifles if your bottle is breathing air colours then it will have to be tested as breathing air and have the full test on them as if youve used them in salt water what i have told you is true so sprey your bottle a differant colour and have a ten year test instead of five bazz41