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Old 04-30-2004, 01:51 AM   #1
lokobreed
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Check Valves are from www.aquatic-store.com

Dennerle Check Valve - $ 17.99
A very high-quality German CO2 check valve for freshwater or marine applications. Secure compression fittings which takes 4/6 mm (ID/OD) or 1/8" airline tubing

KBCV co2 Dennerle Check Valve
Weight: 1.00



Metallic Check Valve - $ 38.99
These are the highest quality industrial-grade Brass Check Valve from German Air Pressure Systems. They are heavy-duty enough for food-grade liquid as well. Just like you, we also thought that these were unnecessarily overkill for aquaristic purposes, but it has been proven that these are the ONLY qualified Check Valves for protecting your expensive CO2 equipment (Regulator & Cylinders) from saltwater with a pressurized Kalkreaktor pushing it backward vigorously. Secure compression fittings which take 4/6 mm (ID/OD) or 1/8" airline tubing

KBCV met check valve
Weight: 6.00


Anyone hear about these or know if they are good check valves for Co2 Tanks?

I like the first ones price, but dont know if its a good one or if the C02 will go thru it overtime.

Thanks
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Old 04-30-2004, 05:32 PM   #2
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I have the german air systems brass valve. Works good. The Dennerle should work as well. The Dennerle is plastic and may corrode over time due to the CO2, but it should last at least a few years from what I read.

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Old 04-30-2004, 07:27 PM   #3
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I tried ordering the metallic one and it was out of stock. Marcus sent me two dennerle's and I do have to say they are excellent quality for check valves. I have turned off the solenoid and not noticed any backflow (not sure there was any at all since I have black co2 tubing) that came into the bubble counter. Solid construction on the dennerle's, they have plastic locking nuts on the ends where the tubes connect into.

Matt
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Old 05-03-2004, 10:23 PM   #4
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Does anyone else have expereince with the Dennerle Check Valve and how long have you used it without any problems?

How many Check Valves do you need to protect your regulator,tank, etc?

Thanks
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Old 05-04-2004, 10:47 PM   #5
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Quote:
Originally Posted by lokobreed
aynone
I use a cheap tetra brand check valve. I only use one... How many depends on how your system is set up. I am using the all in one milwaukee with bubble counter... Nothing really to protect IMO other then water backfeeding into the bubble counter if the system is off during either cleaning or a power outage as I run my C02 24/7....

However to answer your question they are both good valves from what I have heard....


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Old 05-04-2004, 11:04 PM   #6
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I will be using a Ph controller
So I will need a check vlave so it does not run water back into my regulator or tank.

I am using the Milwaukee ALl Ine One Regulator with a 20 lb tank.

I am going to go to Mexico for a month and have my parents feed the fish during my time away and other than feeding they are not good with fish, so I need to make sure nothin like water going into my regulator or anything will happen.

Since the Co2 will be turned on and off with a PH controller it is important I get a good check valve.

Will any of these 2 work well for me and how many do you recommend getting?
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Old 05-04-2004, 11:07 PM   #7
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You should only need one valve, in line from the regulator to the reactor. I suggest placing it as close to the reactor as possible. Yes both are good valves...
That is a long time to leave a tank... I hope you dont have any unpleasant suprises when you get home...

Jason
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Old 05-05-2004, 02:25 AM   #8
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in a months time the worst that could happen the way im loking at it is that the plats will grow alot and ill have alot of trmining to

Any other warnings
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Old 05-05-2004, 02:28 AM   #9
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Trimming is not the worst thing that could happen, algae is :lol:
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Old 05-05-2004, 02:33 AM   #10
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I will have Co2 running and alot of algae cleanup crew
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Old 05-05-2004, 02:37 AM   #11
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Quote:
Originally Posted by lokobreed
I will have Co2 running and alot of algae cleanup crew
Dont matter, without water changes and monitoring of nitrate,phosphate levels. Algae is almost a given...


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Old 05-05-2004, 03:22 AM   #12
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but nothing severe will go wrong like fish death etc correct?

If there is an algae break out I guess Ill have alot of cleaning to do when I get home
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Old 05-05-2004, 03:23 AM   #13
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Quote:
Originally Posted by lokobreed
but nothing severe will go wrong like fish death etc correct?

If there is an algae break out I guess Ill have alot of cleaning to do when I get home
How many and what kind of fish are we talking......
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Old 05-05-2004, 03:29 AM   #14
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Hey Loko, I'm sure your tank will be just fine man :lol: With all the detailed questions you posted before setting up your tank, you should be good to go When I first started, I got screwed first then I asked questions :?
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Old 05-05-2004, 03:38 AM   #15
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So do you all recommend going with ONE check valve and the Denerle is ok wven tho its no metallic?

And using a ph controller is the way to go?
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