Tunze Calcium Dispenser Checked Out

GobyJohnKenobi · 08/05/2007, 07:46 PM

Hello,

I just hooked up my Osmolator with the Calcium Dispenser. After a 24 hour test run with RO water the check valve was squirting water out of the seam and back into the Tunze Bucket.

No water was making it into the tank at that point. I took the Dispenser offline to use the Osmo.

I've seen several reports of the check valves supplied with these units failing. But within 24 hours? A product that costs a hundred dollars?

I'm glad I decided to do a RO water check. Kalk would have been a real mess!! Still pretty discouraging to have almost $300 worth of Tunze products shut down by a check valve that probably cost a few cents.

I'd really like to have close to 100% confidence in my Kalkwasser/topoff system. That's why I chose Tunze.

Would the Dennerle plastic check valve for calcium reactors work with this kalkwasser system? Do you offer a much higher quality replacement check valve?

Also, the replacement metering pump I ordered has a hard plastic fitting where the tubing connects to the pump. How can I connect 4/6 tubing to this? My other pump has a rubber boot that I can snug with a zip tie.

Aquadepot · 08/06/2007, 08:49 AM

Hi GobyJohnKenobi,

Sorry to hear the check valve has failed this is not common, the Dennerle valve may not work as it is designed for CO2 and may only work at a higher pressure you would need to check with Dennerle. Tunze also have a CO2 check valve I would need to check if suitable.

I have been using the Tunze check valve supplied with a dispensor for a few years now with out issue and had no requests for waranty after 100's of Osmolator sales, I think you were un lucky.
I have had particules entering the check valve causing it to fail but this was due to my storage container being outdoors.

I am not in the office at the moment but I didnt think the spare pumps do not come with the rubber connector but could be wrong if so this can be suppplied.

Best regards
Graeme

rvitko · 08/06/2007, 11:06 AM

The hose simply inserts into the new hard plastic fitting the same way it did into the rubber one. If you PM an address I can send a new check valve but you can certainly use just about any check valve that will fit the tubing.

GobyJohnKenobi · 08/06/2007, 08:04 PM

Graeme and Roger,

Thank you for your quick responses.
I'll chalk this one up to bad luck.

Roger, the tubing does not fit snugly enough inside the hard plastic fitting to keep the water from blowing it out when the pump switches on. I'm using a high quality 4/6 mm ID/OD CO2 Proof Tubing. What tubing am I supposed to use with this or how could I seal it properly?

PM sent.

rvitko · 08/07/2007, 09:06 AM

The OE tubing is 4/7mm I think that is why it does not fit snug. We do sell it in a 10m roll if you needed more than the 3m it came with.

GobyJohnKenobi · 08/11/2007, 08:45 PM

Thank you for the information and the replacement part, Roger.

Great service and much appreciated!

08/05/2007, 07:46 PM	#1
GobyJohnKenobi Registered Member Join Date: Jun 2006 Location: Atlanta Posts: 415	Tunze Calcium Dispenser Checked Out Hello, I just hooked up my Osmolator with the Calcium Dispenser. After a 24 hour test run with RO water the check valve was squirting water out of the seam and back into the Tunze Bucket. No water was making it into the tank at that point. I took the Dispenser offline to use the Osmo. I've seen several reports of the check valves supplied with these units failing. But within 24 hours? A product that costs a hundred dollars? I'm glad I decided to do a RO water check. Kalk would have been a real mess!! Still pretty discouraging to have almost $300 worth of Tunze products shut down by a check valve that probably cost a few cents. I'd really like to have close to 100% confidence in my Kalkwasser/topoff system. That's why I chose Tunze. Would the Dennerle plastic check valve for calcium reactors work with this kalkwasser system? Do you offer a much higher quality replacement check valve? Also, the replacement metering pump I ordered has a hard plastic fitting where the tubing connects to the pump. How can I connect 4/6 tubing to this? My other pump has a rubber boot that I can snug with a zip tie.

08/06/2007, 08:49 AM	#2
Aquadepot Registered Member Join Date: Apr 2005 Location: Perth Australia Posts: 454	Hi GobyJohnKenobi, Sorry to hear the check valve has failed this is not common, the Dennerle valve may not work as it is designed for CO2 and may only work at a higher pressure you would need to check with Dennerle. Tunze also have a CO2 check valve I would need to check if suitable. I have been using the Tunze check valve supplied with a dispensor for a few years now with out issue and had no requests for waranty after 100's of Osmolator sales, I think you were un lucky. I have had particules entering the check valve causing it to fail but this was due to my storage container being outdoors. I am not in the office at the moment but I didnt think the spare pumps do not come with the rubber connector but could be wrong if so this can be suppplied. Best regards Graeme __________________ Aquadepot Imports www.aquadepot.com.au GHL / InWatter LED / Kamoer Korallen-Zucht / Pacific Sun TUNZE / Vertex / Aquatic Plant Farm

08/06/2007, 11:06 AM	#3
rvitko RC Sponsor Join Date: Apr 2000 Location: Austin Texas USA Posts: 30,873	The hose simply inserts into the new hard plastic fitting the same way it did into the rubber one. If you PM an address I can send a new check valve but you can certainly use just about any check valve that will fit the tubing. __________________ Roger Vitko Tunze USA "He's for every one of us, stands for every one of us, he'll save every man, woman and child in a mighty Flash!" Current Tank Info: 210 gallon planted tank with Altum Angelfish

08/07/2007, 09:06 AM	#5
rvitko RC Sponsor Join Date: Apr 2000 Location: Austin Texas USA Posts: 30,873	The OE tubing is 4/7mm I think that is why it does not fit snug. We do sell it in a 10m roll if you needed more than the 3m it came with. __________________ Roger Vitko Tunze USA "He's for every one of us, stands for every one of us, he'll save every man, woman and child in a mighty Flash!" Current Tank Info: 210 gallon planted tank with Altum Angelfish

08/06/2007, 08:04 PM	#4
GobyJohnKenobi Registered Member Join Date: Jun 2006 Location: Atlanta Posts: 415	Graeme and Roger, Thank you for your quick responses. I'll chalk this one up to bad luck. Roger, the tubing does not fit snugly enough inside the hard plastic fitting to keep the water from blowing it out when the pump switches on. I'm using a high quality 4/6 mm ID/OD CO2 Proof Tubing. What tubing am I supposed to use with this or how could I seal it properly? PM sent.

08/11/2007, 08:45 PM	#6
GobyJohnKenobi Registered Member Join Date: Jun 2006 Location: Atlanta Posts: 415	Thank you for the information and the replacement part, Roger. Great service and much appreciated!