Found my CO2 leak

kid creole

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Dec 19, 2008
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My solenoid is leaking out both sides. I have the tubing that came with my red sea kit. As best as I can tell, I should insert the tube in as far as I can, and then pull back on the red piece of plastic. It's just blowing CO2 straight out.

How do I rectify this situation? Do I get a new solenoid, or am I connecting the hoses wrong?

Thanks.

By the way, the tank is looking great, thanks to good advice from the folks here.
 

VaughnH

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I assume this is the solenoid:
redseasolenoid.jpg


That looks like it uses a nut at each connection. If so, these usually work by you pushing the nut onto the plastic CO2 tube end, pushing a little metal tube inside the end of the CO2 plastic tubing, then pushing that end into the solenoid fitting and screwing the nut down a bit more than finger tight. I can't tell for sure from the photo if this is the type of fitting you have.
 

VaughnH

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The photo I posted is from the Red Sea website. I haven't seen anything like what you have, but I suspect those red rings are supposed to be inside the nuts on the ends of the solenoid, so tightening the nuts squeezes them down onto the tubing. And, I have to wonder if that connection is intended just for rigid tubing, not flexible tubing.
 

kid creole

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Dec 19, 2008
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VaughnH;32619 said:
The photo I posted is from the Red Sea website. I haven't seen anything like what you have, but I suspect those red rings are supposed to be inside the nuts on the ends of the solenoid, so tightening the nuts squeezes them down onto the tubing. And, I have to wonder if that connection is intended just for rigid tubing, not flexible tubing.

I forgot that it wasn't part of the Seachem kit, it was purchased separately here:
CO2 Solenoid Valve | Pet Solutions

I think it needs rigid tubing, not silicone tubing.
 

SuperColey1

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Feb 17, 2007
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vaughan. They are 'push fit' ones. Similar to industrial airlines (but much smaller) where you clip the hose in and the red bit locks. My reg had one of these but I unscrewed it and my needle valve screwed straight into where the push fit had been. lucky me. lol

I have a solenoid like the one you linked to with the nuts that screw over the barbed inlet/outlet fitted inline. Very good. However mine is from Lunapet/Aquarianversand on ebay. Half the price and exactly the same in design.

AC
 

VaughnH

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The description of the solenoid says:
CO2 Solenoid Valve

"This small and reliable valve is for use with a pH controller or timer to automate the input of co2 for natural planted aquariums or calcium reactors. For use with a regulator with reduced pressure below 5 psi. Spring loaded quick fit connections make it easy to attach co2 resistant tubing. Tubing slides right in for tight and secure connection"

I think the bold, underlined part is the problem. Our regulators rarely hold a 5 psi setting, and sometimes even a 10 psi setting isn't too stable. My guess (my latest guess!) is that your CO2 regulator outlet pressure is just way too high for the fittings the solenoid has.
 

kid creole

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Dec 19, 2008
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No, I had a massive CO2 leak when the pressure was over 5 PSI. You could hear it. I identified this, and my CO2 lasted much longer. 3 weeks instead of 6 days. But I knew 3 weeks was too short, so i bubble tested the lines. It's leaking out between the hose and the red part.

At some psi over 5, it will leak whether open or closed.

Either way I am just going to buy the Clifford (or similar) today and be done with it.
 

kid creole

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Dec 19, 2008
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Update:

I added the clippard solenoid, and no problems. The old solenoid takes a different kind of tubing. On the side of the solenoid it says it's rated to 25 psi. I assume they say to run it at 5 since they know it won't leak terribly fast at that pressure. BS, IMO.

Even more interesting, I left a review on petsolutions.com, where I bought it, clearly explaining the issue, and it never made it to print. Hmmm. I don't think I'll be shopping there again, if I can help it.