CO2 Check Valve
 

I will soon be setting up a Ca reactor. The instruction manual highly recommends installing a check valve for the CO2 line. Any old air check valve is not recommended. The reactor did not come with a CO2 check valve.

I'm not having much luck finding this available in Canada. I'm looking to get one of these...
http://www.marinedepot.com/ps_ViewIt...ry~FICOCV.html

I've never ordered anything online from the States before and am reluctant to do so based on horror stories I've heard on massive shipping and/or duty charges.

Does anyone know where I can get a CO2 check valve in Canada?

Has anyone (from Canada) ordered from "Marine Depot" before? (I'm thinking someone must have). How did it go?

BTW, I hope this is an appropriate post as it appears to me that no sponsors of this site carry what I'm looking for. Therefore, I do not consider this stepping on anyones toes?

Thanx much,

I don't think there is a special check valve. The reason for the check valve is to stop water from wrecking your soleniod. Mine looks like a simple diaphram...actually looks like an aquarium pump check valve. If you really want to get fancy you can buy a spring loaded check valve for 20 bucks or so. If you do, make sure it can lift off with a couple pounds of pressure( even 1 psi )

Would this work?

http://oceanaquatics.com/store/produ...lve---Airline/

Mine looks very similiar

Brass check valves are a lot more reliable. That's the type recommended for CO2 applications. You can get them at Princess Auto, welding supply stores and hydraulic suppliers.

This is the one I am using and I have never had a problem.

Tom R

I wouldn't use a brass check valve in a saltwater application.

Dennerle makes a CO2 check valve made of plastic. It doesn't seem to be listed on the Ocean Aquatics website but that's where I got mine. Call Wendell and ask for one.

It looks like this:
http://www.aquacave.com/dennerle-hig...alve-1581.html

I am not sure why that( the Dennerle) should be called a CO2 check valve. In other words how is it different.

Don't ask me how it works but it only works for CO2. It's the weirdest thing.

The above shown check valves are OK but I've used them in the past and have had to replace them after 6 to 12 months because they stopped working. The Dennerle I've used now for 4 years continuously and is still working, and appears to be all plastic so no worries about corrosion.

And yeah seriously it only seems to work for CO2, although maybe it's just a question of needing to build up enough pressure in the line (I run my CO2 regulator around 20psi).

I think it is a pressure thing. The ones designed for co2 are industrial grade too which would be more reliable than the hobby grade plastic ones you usually find at the LFS. Reeeeeeeeeaaaaaaallly bad things can happen if check valves fail in an industrial setting.