DIY Undergravel Jet System

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partsrep

Go Yankees!
Original poster
Mar 16, 2005
107
0
0
LI, NY
Here's some shots of my DIY Undergravel Jet System.

1. The first shot is the basic layout showing the closed loop system. I used a semi rigid .50" ID tubing I found at the local hardware store, and standard 1/2" fittings I found in the home irrigation department. I made a barb to barb elbow by using a barb to threaded elbow and a straight barb. The straight barb is just pressed in the inside of the threaded end. This allowed me to connect the tubing the same way all the way around. I then attached the entire setup to a peice of eggcrate cut to fit inside the tubing. This will help hold everything in place and provide a safe and sturdy base for my large rocks.

2. Next we have a shot from the same level as the bottom of the tank to illustrate how low it stays in the tank. If I use 1.5" of substrate it will only leave .25" of nozzle exposed above the surface.

3. The jet nozzle was made from some of the semi rigid plastic tubing I used for the main plumbing. I heated a short section in boiling water then squeezed the end with a pliers and cooled it under running water.

4. Next is the pump connection. I used a Maxi-Jet 900 pump which has a 1/2" OD outlet nozzle which fit perfectly into the tubing. A foam filter will eventually be placed on the intake grid of the pump and will add to my bio filtration.

5. I finished up with a flow test and as you can see there is adequate flow from the jets. Once I filled the tank completely there was a nice gentle, natural feeling current throughout the tank.

6. Total cost: $20 for the powerhead, $12 for tubing & fittings, $9 for the eggcrate.

Plumbing layout.JPG Pipe level.JPG Jet nozzle.JPG Pump connection.JPG Rt side jet flow.JPG
 

partsrep

Go Yankees!
Original poster
Mar 16, 2005
107
0
0
LI, NY
Smaller African Cichlids.
 

o_grande_rei

Registered Member
Apr 7, 2007
2
0
0
Gilbert, AZ
So after two years, how is it working? I ask because I want a UGJ system for my 55 gallon tank. I am just starting it and I have seen a few different plans. I'm trying to figure out which will work best. Also, why did you do a closed ;oop system as apposed to an open loop? Is there a difference? Thanks!!!
 

ct-death

Fish & Visitors Smell in 3 Days...
Feb 27, 2007
2,043
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36
New Hampshire
Agree, great craftsmanship bro! ;)
 

FishyFry

Feeds low on the food chain
Apr 7, 2007
389
0
0
Michigan
www.pandk.org
Very nice! I'm thinking that to flip that system so that it resides at the top of the tank and points in (without the eggcrate and a smaller pump maybe), would make a good variation for someone who needs a spray bar.
 
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