Go Back   Aquarium Advice - Aquarium Forum Community > Saltwater and Reef > Saltwater Reef Aquaria
Click Here to Login

Join Aquarium Advice Today
Reply
 
Thread Tools Search this Thread Display Modes
Please support our sponsors and let them know you heard about them on AquariumAdvice.com
 
Old 11-01-2003, 02:38 PM   #1
Aquarium Advice Addict
 
Join Date: Apr 2003
Location: chicago
Posts: 2,216
venturi what am i missing

seeing how maxi jets suck air and water together going into a seaclone skimmer i tried to set up a magdrive pump to do the same thing but just the littlest air greatly decreases the amount water am i missing something or are magdrives not made for this?? kinda lost!! made a skimmer and trying to get away from using an air pump !! any ideas would be a great help !!
__________________

__________________
scuba_steve is offline   Reply With Quote
Old 11-01-2003, 02:49 PM   #2
Guest
 
Posts: n/a
The only thing I can think of is that the air has to be after the return. It should not slow the flow though. If it does not have a venturi input, you would have to drill a hole just after the return, and attach the airline... This should create the suction for air...
__________________
  Reply With Quote
Old 11-01-2003, 03:00 PM   #3
Aquarium Advice Addict
 
Join Date: Apr 2003
Location: chicago
Posts: 2,216
ummm ok which leads me to another question !! i have a basic skimmer made by aquatic life support and using a rio 2500 to power it and that has a air line attached right at the neck of the main input side and that sucks air but when i made one the same way instead of sucking air it shoots water out of the air line !! and i dont understand why !! so thought if i used the pump to suck in the air & water that it would work but a magdrive 700gph pumps less water than a maxijet 2500 300 gph does with the same amount of air or close to it !! must be something with the impellers huh??
__________________
good luck keith
scuba_steve is offline   Reply With Quote
Old 11-01-2003, 03:07 PM   #4
Aquarium Advice Addict
 
Join Date: Apr 2003
Location: chicago
Posts: 2,216
mabe im trying to push to much water ?? and why it would shoot out the air line instead of sucking air !?!?
__________________
good luck keith
scuba_steve is offline   Reply With Quote
Old 11-01-2003, 03:12 PM   #5
Guest
 
Posts: n/a
Well, I don't know that... I guess the laws of physics takes a role here. If you have water flowing in a pipe at a high rate, with a reduced outlet, and you put a hole in the pipe, water would spray out of the hole... If there was no resistance on the other end, it would suck air in the hole.. Kind of the same way an airbrush works... air flows through the tip drawing paint from the cup through a tube...Also, is the airline above water level?
__________________
  Reply With Quote
Old 11-01-2003, 03:19 PM   #6
AA Team Emeritus
 
Join Date: May 2002
Location: Virginia
Posts: 2,256
Send a message via ICQ to fishfreek Send a message via AIM to fishfreek Send a message via MSN to fishfreek Send a message via Yahoo to fishfreek
ALso if the ventri is to far below the water level it can lose effectivness. This is something that with the seaclone is in the instructions to make sure the PH and the ventri is now more than X distance from the top of the water.
__________________
Remember dont tap the glass, your fish will think you're an idiot -Anonymous mother

Check out our articles area. 30+ Aquatic articles for your enjoyment
Are you in or around the Shenandoah Valley area? If so click here to join our regional forum.
fishfreek is offline   Reply With Quote
Old 11-01-2003, 03:20 PM   #7
Aquarium Advice Addict
 
Join Date: Apr 2003
Location: chicago
Posts: 2,216
yes the air line is above the water and it a 1/2 " line from pump to skimmer body which is a 4" pcv tube so no reason i can think of why it wont suck it only squirts water !! i thought that mabe due to the 4" skimmer body being like 3' high might add to much back pressure and why it does that but i also have been screwing with my seaclone to make it work better and drilled a hole at the neck on the feed side and that spits water out as well !! thought that if i could have it suck air that way it would alow the full flow of water from the maxi jet !!
__________________
good luck keith
scuba_steve is offline   Reply With Quote
Old 11-01-2003, 03:26 PM   #8
Aquarium Advice Addict
 
Join Date: Apr 2003
Location: chicago
Posts: 2,216
just funny how something so simple so i thought could be such a head ache !! but like timbo said "I guess the laws of physics takes a role here" just think that it cant be that hard !!
__________________
good luck keith
scuba_steve is offline   Reply With Quote
Old 11-01-2003, 06:22 PM   #9
Guest
 
Posts: n/a
It is funny.. I worked for a Jacuzzi company and we built Spas.... Now... There isn't rocket science in them either... If you have ever relaxed in one, you should have noticed that there is or usually is, a screw cap on the panel that when you open it, air is let in, and you get the mix or air and water to soothe those aching muscles... LOL.. Now.. When we plumbed those, we just cut a hose and placed a T in the line and ran it to the screw cap...Simple operation and I never saw water come out of the screw cap... Now I know that the Venturi Skimmers work the same way. Even on my Penguin PH's, the venturi is placed right on the mouth of the return and it works great.... On a Mag pump I would think that if you had a hole on the return side of the pump as close to the mouth of it, it should work flawlessly... I think you have ventured the routes, I am just trying to keep my sanity in check as I ponder your situation...
__________________
  Reply With Quote
Old 11-01-2003, 06:25 PM   #10
Guest
 
Posts: n/a
Whoa,, I just noticed something,,, You said 4" pipe 3' tall? There is your problem...
YOu need a Mag 12 to push that baby....
__________________
  Reply With Quote
Reply

Tags
missing, venturi

Please support our sponsors and let them know you heard about them on AquariumAdvice.com

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not 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 Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Need SMALL Venturi !!! RandyStacyE General Hardware/Equipment Discussion 3 12-09-2005 12:18 PM
mag 5 venturi greatgman General Hardware/Equipment Discussion 2 07-15-2005 01:08 PM
The Best DIY Venturi RandyStacyE DIY Projects 5 03-16-2005 11:30 PM
What's this venturi thing? gmac General Hardware/Equipment Discussion 8 10-11-2004 06:37 PM
DIY venturi loganj DIY Projects 7 04-08-2003 09:30 AM







» Photo Contest Winners








Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -4. The time now is 09:34 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.