This regulator was purchased from Ebay. The one at Automated Aquarium Systems is the exact same one and so is the regulator/solenoid/bubble counter at Floridadriftwood.com as well as AquaBotanic selling an exact one, but they are not the distributor/seller (just wanted to make that known as I am not questioning their products).
FDW regulatorsite shows that the solenoid does have backflow protection.
I did receive two O-rings and one was placed between the regulator and the cylinder valve at that connection which is also where the only teflon tape was wrapped around the threads. The other O-ring is a spare as there was just no where to place it and no mention of placing it anywhere else except the connection at the regulator/cylinder valve.
The only check valve that I have added is between the top of the bubble counter and the internal reactor on the tank. Other than that, the solenoid is suppose to have "backflow protection" which I am assuming is just another way of saying a checkvalve.
<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>gsmollin: It also looks possible that water gets into the valve when the gas runs out of the tank and the pressure drops off. <HR></BLOCKQUOTE>
If the solenoid is plugged in (which has backflow protection) and the gas runs out (which I'll suppose is best prevented anyway by changing tanks prior to this), water would not get in would it?
The low pressure gauge was suppose to be set at 10psi. In my previous post, this was originally set at 10psi, but after aprox. 30 minutes, the pressure had dropped to 0 and there was no gassing moving through the bubble counter. This was then readjusted to 15 psi and I have not had a problem with it dropping again. Anything below 20 would be okay right?
farm41: The solenoid was not plugged in when the water was placed in the bubble counter. Then before the solenoid is plugged in/opened, the cylinder valve was completely opened to seal the valve packing (per original instructions I followed) and the high pressure gauge registered the tank (confusing here too 10 lb tank registered 50 on the outside ring = 700 psi on the inside ring of the high pressure gauge although I have no idea if it should have read any differently

).
Thanks yall for helping me out with this
Tracy
Ummm, Is it suppose to do that!?