Aquatek Co2 Regulator/Solenoid Issue

Bodul67 · Feb 17, 2021

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.

laverda · Feb 17, 2021

O-tings are available from a wide variety of sources. Other hardware stores often have a different selection especially if you have a decent Ace hardware near by. Auto parts stores, Harbor Freight, Granger supply, industrial hardware stores, on-line stores and bearing supply houses are all possibilities. A good bearing supply is pretty much guaranteed to have it, but most have a minimum purchase.
If you have the deminsions, I might even be able to help you out.

Bodul67 · Feb 17, 2021

laverda said:
O-tings are available from a wide variety of sources. Other hardware stores often have a different selection especially if you have a decent Ace hardware near by. Auto parts stores, Harbor Freight, Granger supply, industrial hardware stores, on-line stores and bearing supply houses are all possibilities. A good bearing supply is pretty much guaranteed to have it, but most have a minimum purchase.
If you have the deminsions, I might even be able to help you out.

Thanks for the info. It seams to be 5/16" ID x 1/32" CS. I bought from Lowes 5/16" ID x 1/16" CS, but it's too thick the 1/16" CS