Bleed valve for PVC reactors? - The Planted Tank Forum
 
LinkBack Thread Tools Display Modes
post #1 of 8 (permalink) Old 05-02-2011, 09:25 PM Thread Starter
Planted Member
 
sns26's Avatar
 
PTrader: (3/100%)
Join Date: Mar 2010
Location: Washington DC
Posts: 239
Bleed valve for PVC reactors?

Has anyone figured out a clean way of bleeding off the air (not CO2) that is inevitably trapped inside a CO2 reactor when you first set it up? Mine gurgles incessantly for a few days before (I guess) the air eventually dissolves into the passing water. But I'd like to be able to just let that air escape quickly to shut the thing up.

I probably should have drilled a hole for some small airline/CO2 tubing and then put a valve on the tubing. But now I've already glued the thing up and have no great way of pulling tubing through it.

Am I nuts to look for a small metal threaded fitting that I could install into the PVC pipe from the outside?
sns26 is offline  
Sponsored Links
Advertisement
 
post #2 of 8 (permalink) Old 05-02-2011, 09:53 PM
Wannabe Guru
 
PTrader: (4/100%)
Join Date: Dec 2004
Posts: 1,797
On mine i put 2 t barbed fittings on the top of the reactor. The 2 extra outputs i linked with some tubing. So if it fills with water i open one of them and air will come out (air rises). Check out my 55g journal in my sig


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.



To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.



To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.



To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


...DIY co2 sucks
...ricca sucks
accordztech is offline  
post #3 of 8 (permalink) Old 05-02-2011, 10:04 PM
Wannabe Guru
 
fresh.salty's Avatar
 
PTrader: (17/100%)
Join Date: Jul 2010
Location: SoCal
Posts: 1,956
I drilled and tapped mine towards the top through the fitting and pipe so it would have enough threads to bite. With just the thickness of the pipe I wouldn't do it.
fresh.salty is offline  
 
post #4 of 8 (permalink) Old 05-02-2011, 10:26 PM
Plant Clown
 
kevmo911's Avatar
 
PTrader: (32/100%)
Join Date: Sep 2010
Location: Greensboro, NC
Posts: 4,729
While I haven't done it (I haven't needed to bleed air), I've found that a 3/8" drillbit makes a perfect size hole for 1/8" NPT thread. I'd probably use a small ball valve. I have my CO2 attached to a barb with 1/8" thread screwed into the side of the pipe, so I know it works.
kevmo911 is offline  
post #5 of 8 (permalink) Old 05-02-2011, 10:53 PM
Planted Tank Guru
 
Dave-H's Avatar
 
PTrader: (8/100%)
Join Date: Jul 2010
Location: Denver, CO & Phang-Nga, Thailand
Posts: 2,415
My technique is pretty crude. I prime the whole system as much as I can, leaving the inevitable bubbles at the top of the reactor. Then I start the flow, pick up the reactor and hold it so that the top is just a bit higher than the bottom so everything floats up towards the output hose. Then sends a big mess of bubbles exploding into the tank. Once all the bubbles are out of the reactor, I set it back down. Problem solved



To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
"The fewer our wants, the nearer we resemble the gods." ó Socrates

Dave-H is offline  
post #6 of 8 (permalink) Old 05-03-2011, 04:08 AM
Planted Tank Guru
 
PTrader: (84/100%)
Join Date: Dec 2005
Location: Sacramento, CA
Posts: 21,015
My Home Depot has a tiny little bleed valve in with the brass pipe fittings. It works perfectly. I drilled and tapped the top of the reactor, 1/8" pipe threads, and screwed it in using teflon tape.

Hoppy
Hoppy is offline  
post #7 of 8 (permalink) Old 05-03-2011, 04:19 AM
Plant Clown
 
kevmo911's Avatar
 
PTrader: (32/100%)
Join Date: Sep 2010
Location: Greensboro, NC
Posts: 4,729
Quote:
Originally Posted by Hoppy View Post
My Home Depot has a tiny little bleed valve in with the brass pipe fittings. It works perfectly. I drilled and tapped the top of the reactor, 1/8" pipe threads, and screwed it in using teflon tape.
Ooooh ...any link? I'm happy to cruise over to HD to check, but I wasn't able to find anything at the HD online site that had 1/8" NPT threads.
kevmo911 is offline  
post #8 of 8 (permalink) Old 05-03-2011, 04:58 AM
Wannabe Guru
 
PTrader: (1/100%)
Join Date: Apr 2011
Location: Westfield, IN
Posts: 1,746
Assuming it's made of PVC, any auto parts store sells Schrader valves, the kind you fill tires with, and you could drill a hole and carefully thread the valve in. If you apply even pressure while screwing it into the hole and take your time the valve itself will tap the plastic. If you put it right at the top of the apparatus, you've just got to push in the valve stem with a screwdriver or fingernail and you're golden.

ETA: Most of these are the same size as 1/8" NPT fittings, but they do not have the taper. If you happen to have a 1/8" tap lying around or want to buy one, you can do a very nice job of it.
jasonpatterson is offline  
Reply

Tags
None

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










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