Plantgirl

Congratulations on getting your feeding tube out tomorrow!
If it were not a sin, I would envy you.
Relax today. The only valve a regular PEG tube has is the one that takes the water to fill up the balloon that holds it in. The actual tube itself goes directly to the stomach with no valves in between. The worse that can happen is that the valve leaks water and your PEG would fall out on its own before the doctors pull it out.
Unless you mean the closure to the end of your tube. That needs to be capped or else the tube clamped. Bottom line:
If nothing is coming out of your stomach thru the tube, you are fine.

I never heard of a decompression valve. Buttons, or low profile G tubes, have two valves. The same water valve as a PEG plus an anti-reflux valve that prevents the stomach contents from coming back out once the feeding extension is unhooked. That anti reflux valve also has a plastic cap but it is just extra insurance to keep debris out.

Christine is right about crushing medicine well. Enjoy your tube free life

Charm