The changeover regulator with the black plastic lever has a cap or cover which is not all that easy to see. The "cap" is actually an indicator which shows either red or green --- again, not easy to spot. When the indicator or cap is showing red, it means that whatever tank you have been drawing propane from is empty and you need to switch over to the other tank.
You shouldn't be trying to pry off this cover ----- it is an indicator.
When you flip the lever over to the other side, the indicator will turn green.
There are different ways that you can use the twin tanks. Have them both open or just one and the switching procedure will be a bit different depending on how you have your tanks set up.
Hope this helps to answer your question.
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2008 Cougar 5th Wheel 27RKS
2005 2500 GMC Duramax
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