Needle valves - The Planted Tank Forum
 
LinkBack Thread Tools Display Modes
post #1 of 9 (permalink) Old 12-30-2009, 04:56 AM Thread Starter
Wannabe Guru
 
Hobbes1911's Avatar
 
PTrader: (21/100%)
Join Date: Mar 2009
Location: Boston, MA
Posts: 1,611
Needle valves

How can I make a needle valve myself? Or is there a Home Depot solution that would have the same properties than an aquarium store bought one?
Hobbes1911 is offline  
Sponsored Links
Advertisement
 
post #2 of 9 (permalink) Old 12-30-2009, 05:50 AM
Algae Grower
 
PTrader: (0/0%)
Join Date: Dec 2008
Location: Canada
Posts: 46
It's not worth it. The expense of a decent needle valve is nothing compared to your fish+plants. Needle valves are not DIY
theredben is offline  
post #3 of 9 (permalink) Old 12-30-2009, 05:52 AM
Moderator
 
Darkblade48's Avatar
 
PTrader: (3/100%)
Join Date: Jan 2008
Location: Toronto/Singapore
Posts: 11,638
I don't think it is possible to DIY a needle valve...

It is better to wait on the Swap and Shop forums and/or eBay for a cheap needle valve to come along. The Fabco NV55 is an excellent needle valve and will only run you ~25 USD.

Of course, you could always wait for the cheap Swagelok or Parker metering valve to come along...

Anthony


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

Eheim Pimp #362 - Eheim 2213 x2, Eheim 2028, Eheim 2217, Eheim surface skimmer and Eheim autofeeder.
Victor Pimp #33 - HPT272-125-350-4M
Darkblade48 is online now  
 
post #4 of 9 (permalink) Old 12-30-2009, 02:53 PM
Planted Tank Guru
 
PTrader: (84/100%)
Join Date: Dec 2005
Location: Sacramento, CA
Posts: 21,012
DIYing a good needle valve is like DIYing a wristwatch. However, if you have a small machine lathe, and the skills to use it, you could make one that would work fine. If you try it, be sure to report it here, so the rest of us can at least day dream about doing the same.

Hoppy
Hoppy is offline  
post #5 of 9 (permalink) Old 12-30-2009, 06:23 PM
Planted Tank Obsessed
 
airborne_r6's Avatar
 
PTrader: (10/100%)
Join Date: May 2008
Location: Springville, UT
Posts: 499
Send a message via MSN to airborne_r6
Considering that about half of the needle valves sold give inconsistent results, the chance of DIYing a good needle valve is basically zero.

[/off-rant]
airborne_r6 is offline  
post #6 of 9 (permalink) Old 12-30-2009, 09:48 PM
Planted Tank Guru
 
PTrader: (16/100%)
Join Date: Jul 2008
Location: East Lansing, MI, USA
Posts: 2,709
Good needle valves are cheap. Automatic machines can spit out the parts in seconds. Unfortunately those parts have to be assembled, tested, packaged, shipped to wholesale dealers, broken down into smaller lots and stored. Next they are shipped to smaller wholesale distributors who may sell direct to the customer or more probably shipped to a smaller distributor who sells to LFSs and direct to customers.
Everyone in the distribution chain wants a return on their investment and a profit.

The really good needle valves go to medical and lab equipment manufacturers. They pay considerably more than we do for just a little bit better quality control.

Save money elsewhere. Purchase the best needle valve you can find for a good price. A couple of years ago people cobbled together Home Depot parts for pressurized CO2 systems. They always leaked and emptied the cylinder sooner rather than later.
post #7 of 9 (permalink) Old 01-01-2010, 10:47 PM
Planted Tank Guru
 
talontsiawd's Avatar
 
PTrader: (1/100%)
Join Date: Oct 2008
Location: Oakland, CA
Posts: 4,838
Send a message via AIM to talontsiawd
I cannot see this happening without a machine shop. If you theoretically had all the equipment, you probably wouldn't save alot on materials anyway compared to a decent commercial one. It just isn't feasable, even if you had all the equipment.

-Matt

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.
talontsiawd is offline  
post #8 of 9 (permalink) Old 01-04-2010, 01:25 AM
Wannabe Guru
 
born2lovefish's Avatar
 
PTrader: (41/100%)
Join Date: Dec 2006
Location: Indianapolis
Posts: 1,037
Quote:
Originally Posted by Hoppy View Post
DIYing a good needle valve is like DIYing a wristwatch. However, if you have a small machine lathe, and the skills to use it, you could make one that would work fine. If you try it, be sure to report it here, so the rest of us can at least day dream about doing the same.
I have a metal lathe, but no time to mess with it. My brother in law's dad has has lots of metal equipment in his shop. Even if you can make a DIY needle valve, your time is probably worth more than what you can buy a decent one for.
born2lovefish is offline  
post #9 of 9 (permalink) Old 01-05-2010, 03:40 AM
Planted Tank Guru
 
PTrader: (84/100%)
Join Date: Dec 2005
Location: Sacramento, CA
Posts: 21,012
Quote:
Originally Posted by born2lovefish View Post
I have a metal lathe, but no time to mess with it. My brother in law's dad has has lots of metal equipment in his shop. Even if you can make a DIY needle valve, your time is probably worth more than what you can buy a decent one for.
When I was in college, back in the Stone Age, one of my courses was Machine Shop, and there we learned to use a machine lathe. I scored a little model airplane engine from someone smarter than me, and all it needed was a valve needle, so I decided to make one. The thread size I needed was about 80 threads per inch. After a few attempts I accepted that I couldn't even grind the cutter to make that size thread, so I looked for a die, but the smallest one was only 64 threads per inch. I spent two Saturday afternoons struggling with this, then turned in my effort for credit. I got credit for effort, nothing for results.

A good needle valve costs about $30 now. Most people doing other than simple menial work earn more than that per hour, at least in my state. So, if you try to DIY this, at least write a thread about it so we can save our time and not try it in person.

Hoppy
Hoppy 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