CO2 Brass Check Valve - Didn't come with instructions

[tbone28]

I ordered the following check valve for my calcium reactor:

http://www.marinedepot.com/ps_ViewI...quarium_Supplies_CO2_Accessories~vendor~.html

Which way should the CO2 be flowing? Thanks

 

[MarineDepot]

tbone

The notches on the check valve form a arrow of sorts pointing in the direction of flow. In the pictures on our site the direction of flow is top to bottom. http://www.marinedepot.com/ps_ViewItem~idProduct~KL3115~tab~2.html
FYI you may need to run the pressure a little higher then some calcium reactor directions call for, as this check valve usually takes a little more then 10 PSI to open it. Just open you regulator slowly to see at what PSI the check valve opens then set the PSI another pound or two above that. Then adjust the bubble count to the manufactures instructions using the needle valve. once you have it close, you can fine tune your bubble count by adjusting the pressure, as long as you stay above the opening pressure of the check valve.

Steve
Marine Depot Customer Services
www.Marinedepot.com
714.385.0080 Phone
714.385.0180 Fax

 

[tbone28]

Hi Steve,

As usual, thank you and your staff to prompt, useful customer service!

Your explanation and pic really helps. I did see the directional arrow, but I wasn't sure if it was the direction of airflow, or just for "design purposes".

I tried to blow into the check valve, and no air came out the other end, which led me again to think the arrow was for design purposes. Based on your explanation of needing to run a higher pressure, that explains why I couldn't blow any air through. i can easily blow air through those cheapy plastic valves.

Based on your experience, do you have a ballpark estimate as to where I should start my pressure at? Also, since I'll be running a higher pressure, does that mean I'll go through my CO2 quicker?

Edit: BTW, I can't figure out what that black plastic piece around the check valve is used for. Is it used to support the valve's weight?