Ista spring stop check valve - The Planted Tank Forum

 
LinkBack Thread Tools Display Modes
post #1 of 15 (permalink) Old 03-02-2013, 01:56 AM Thread Starter
Planted Tank Enthusiast
 
Sugardaddy1979's Avatar
 
Join Date: Jan 2012
Location: Athens, GA
Posts: 684
Ista spring stop check valve

Anyone tried these on a pressurized system? I like the idea of them because they have the compression fittings. What does everyone else use with their atomic diffusers for check valves other than the Swageloks?

http://www.aquariumplants.com/Produc...00577&CartID=2

Sunsun Pimp Club Member #068
Sugardaddy1979 is offline  
Sponsored Links
Advertisement
 
post #2 of 15 (permalink) Old 03-02-2013, 01:57 AM Thread Starter
Planted Tank Enthusiast
 
Sugardaddy1979's Avatar
 
Join Date: Jan 2012
Location: Athens, GA
Posts: 684
I'm trying to use the kynar ones from us plastics. They won't hold a good seal and leak or the line blows off.

Sunsun Pimp Club Member #068
Sugardaddy1979 is offline  
post #3 of 15 (permalink) Old 03-02-2013, 02:25 AM
Plant Clown
 
kevmo911's Avatar
 
Join Date: Sep 2010
Location: Greensboro, NC
Posts: 4,687
The compression valves will help with keeping tubing where it should be. But this is the first I've seen of this particular check valve, and I don't know of any reason it should be trusted beyond any other type, several of which are complete garbage.

There's also this SMC check valve from USPlastic.
http://www.usplastic.com/catalog/ite...8670&catid=489

Never tried it, always meant to.
kevmo911 is online now  
post #4 of 15 (permalink) Old 03-02-2013, 02:36 AM Thread Starter
Planted Tank Enthusiast
 
Sugardaddy1979's Avatar
 
Join Date: Jan 2012
Location: Athens, GA
Posts: 684
Wonder if the 3/16" would be a better choice than the 1/8". The id of tubing seems to be 0.17". 1/8 is smaller than that while 3/16 is slightly larger. Maybe that would give you me a good tight fit. Might try the Ista too just to see. They are $6 shipped on fleabay.

Sunsun Pimp Club Member #068
Sugardaddy1979 is offline  
post #5 of 15 (permalink) Old 03-02-2013, 03:22 AM
Plant Clown
 
kevmo911's Avatar
 
Join Date: Sep 2010
Location: Greensboro, NC
Posts: 4,687
So your tubing is not 1/4 - 1/8? Standard LFS tubing has a larger ID than 1/8, but CO2 tubing is generally 1/4 by 1/8, or, if it's Asian, ADA included, sometimes 6mm/4mm. I'd switch to 1/4 by 1/8, but if it's 6/4mm, I'd go with Swagelok/Parker/clone (there are many) compression fittings.

However, the idea of going with 3/16 may work, especially if you're using nonstandard tubing size. Still, unless you're planning on going specifically with ADA equipment, I'd switch everything to 1/4 by 1/8, tubing and fittings included.

Compression fittings are the most dependable. Nonplastic components are the most dependable. 1/4 by 1/8 tubing and compression fittings are the most standard in our hobby.
kevmo911 is online now  
post #6 of 15 (permalink) Old 03-02-2013, 03:39 AM
Wannabe Guru
 
m00se's Avatar
 
Join Date: Jan 2011
Location: Syracuse, NY
Posts: 1,484
Why not just use a 4" zip tie on the barbs like a hose clamp? Grab the tie with a pair of pliers and lock that hose right down. Works for me. I think you can see them in this pic on the check valve. It's a terrible shot but it illustrates what I mean. $2 at Lowes for 100 of them!

m00se is offline  
post #7 of 15 (permalink) Old 03-02-2013, 07:46 AM Thread Starter
Planted Tank Enthusiast
 
Sugardaddy1979's Avatar
 
Join Date: Jan 2012
Location: Athens, GA
Posts: 684
I tried zip ties, but didn't use pliers. I'll give that another shot. Thanks.

Sunsun Pimp Club Member #068
Sugardaddy1979 is offline  
post #8 of 15 (permalink) Old 03-02-2013, 02:55 PM
Planted Tank Obsessed
 
jstehman's Avatar
 
Join Date: Dec 2010
Location: LaVista, NE
Posts: 471
Order the samples from http://www.ark-plas.com. These have been working great for me.
(Thanks mOOse!)

Never show anyone your true potential. If you do, they will always expect it.
jstehman is offline  
post #9 of 15 (permalink) Old 03-02-2013, 03:01 PM
Wannabe Guru
 
m00se's Avatar
 
Join Date: Jan 2011
Location: Syracuse, NY
Posts: 1,484
m00se is offline  
post #10 of 15 (permalink) Old 03-02-2013, 05:51 PM Thread Starter
Planted Tank Enthusiast
 
Sugardaddy1979's Avatar
 
Join Date: Jan 2012
Location: Athens, GA
Posts: 684
The ones I have still leak even with zip ties.

Sunsun Pimp Club Member #068
Sugardaddy1979 is offline  
post #11 of 15 (permalink) Old 03-02-2013, 06:19 PM
Planted Tank Guru
 
DarkCobra's Avatar
 
Join Date: Jun 2004
Location: Baton Rouge, LA
Posts: 3,349
Zip ties wouldn't get tight enough for me either, even with pliers. They're just not meant to apply pressure, IMO.

I used a screw-type hose clamp instead. But I couldn't find one quite small enough for my airline. So I cut a 3/8" length of larger and thicker airline, slit it down the length with a utility blade, and trimmed the diameter down so that when wrapped around the smaller airline it would fit snugly, essentially widening the airline. Then applied the hose clamp over it. This made the hose clamp fit, plus helped cushion and distribute force more evenly - important since these clamps don't have a perfectly circular profile, due to the mechanism. Solved the leaks and pop-offs.
DarkCobra is offline  
post #12 of 15 (permalink) Old 03-02-2013, 06:25 PM
Wannabe Guru
 
m00se's Avatar
 
Join Date: Jan 2011
Location: Syracuse, NY
Posts: 1,484
Hehe..well they worked for me (although my setup is completely different than the one in the pix I posted now)
m00se is offline  
post #13 of 15 (permalink) Old 03-02-2013, 06:59 PM
Planted Tank Guru
 
DarkCobra's Avatar
 
Join Date: Jun 2004
Location: Baton Rouge, LA
Posts: 3,349
Hard to tell for sure from the photo, but is your airline a bit "squishy"? That would help a zip tie get that last little ratchet needed.
DarkCobra is offline  
post #14 of 15 (permalink) Old 03-02-2013, 08:32 PM
Wannabe Guru
 
m00se's Avatar
 
Join Date: Jan 2011
Location: Syracuse, NY
Posts: 1,484
I believe that is just Walmart-purchased airline. Pliable, yes.
m00se is offline  
post #15 of 15 (permalink) Old 03-02-2013, 09:03 PM
Planted Tank Guru
 
DarkCobra's Avatar
 
Join Date: Jun 2004
Location: Baton Rouge, LA
Posts: 3,349
Ah, mine's more rigid. Can't get any compression on it with a zip tie.
DarkCobra is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the The Planted Tank Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome