Aquatek Co2 Regulator/Solenoid Issue

[Bodul67]

I have the AQUATEK Aquarium CO2 Regulator with Integrated COOL TOUCH Solenoid. It's on a timer to turn on & off at specific times. When the timer switches off, the solenoid sticks in the open position. I have to unplug & plug it back in multiple times before the solenoid closes. I unscrewed the solenoid from the brass regulator and found that the rubber O-Ring has been torn slightly and that's the reason the solenoid wouldn't close properly. I reached out to Aquatek about a replacement O-Ring and they replied by I need to order a new solenoid. Of course they would, they want me to pay $40 for a new solenoid rather than pay less than $1 for a new O-Ring. Horrible!!!

Has anyone had this same problem and how was it rectified? I can't seem to find the exact O-ring to replace. I found one at Lowes and it's 5/16" ID x 1/16" CS, but it's too thick. The CS is half the thickness around 1/32" that I need.

The picture below is the O-ring that I'm talking about. It's NOT a picture of the torn one that I have, it's just a reference to location of O-Ring.

 

[PheonixKingZ]

I know that @Wills has Co2, maybe he can help.

@mbsqw1d

 

[Wills]

I don’t know this brand but good you’ve been able to work out what part you need. Might be worth checking with plumbing and heating suppliers to see if they have that type of o ring?

 

[madmark285]

You can try Granger, very cheap if you can pick them up locally. What you want are Round Buna N O-Rings.