On this page we go over the replacement of rubber diaphragms. Remember, these units go through a lot of abuse, running for months on end and vibrating at an incredible rate. It is amazing that they last at all. Most manufacturers recommend a routine maintenance replacement from 1-2 years. The unit may appear to work fine, but can often be at a reduced rate due to stretching of the rubber
Also of note, some manufacturers of smaller airpumps don't sell replacement diaphragms for their units. This is essence makes them throw away items. Sometimes spending a little more money is a better option in the long run if the option to obtain new diaphragms is available
Although this page deals with a Hagen Optima air pump, this general procedure can be followed with most air pumps. Beware the "extra parts" ! For more information, see the aeration page |
Step 1
Remove the screws from the bottom of the unit |
|
|
 |
Step 2
With the the housing lifted off, remove the 1 screw near the air output |
|
Step 3
To remove the metal housing, 2 other screws from the opposite side need to be removed |
|
|
 |
Step 4
Carefully lift the metal housing. Be cognizant of the wiring which stays attached
The diaphragm is now visible |
|
Step 5
There is a single screw holding the diaphragm in place |
|
|
 |
Step 6
With the screw removed, the diaphragm should be easy to work out |
|
Step 8
Spread the armature and you will be able to see the split rubber
The rubber was split on both sides of this diaphragm, all air pressure is lost in this scenario |
|
|
 |
Step 9
Screw the new diaphragm into place |
|
Step 10
The place holder for the nipple needs to be set - this can easily become one of those left over "spare parts" if you are not careful |
|
|
 |
Step 11
Replace the rear screws |
|
Step 12
Replace the last screw to secure the metal housing |
|
|
 |
Step 13
Seat the body together and just replace 2 of the screws |
|
Step 14
Plug in the unit and adjust the output to high |
|
|
 |
Step 15
Test the unit for a good stream of air with your finger |
|
Step 16
Once you have confirmed the unit is working properly, replace the rest of the screws at the bottom of the air pump
To test if an air pump needs diaphragms replacement, attach an air line and place it
right at the surface of the water. You may see air bubbles. As you lower the house under water, back pressure increases. It is at this point with split diaphragms that the air bubble may stop as air take the path of least resistance and escapes out of the compromised diaphragm
Expect to take about 15 minutes to complete this task
|
 |
|
The great thing about the pond building business is that you are constantly trying new things and learning new techniques I have found unfortunately, very little direction from pond books and had to learn most things through trial and error This "How To" section of our website helps with the actual 1-2-3 and finer points of accomplishing tasks related to this hobby
|
