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Airstones: Low resistance ceramic Air Diffusers. Provides more output due to less back pressure. Allows Air pump to operate at higher flows. Can be cleaned and re-used for many years. Fused ceramic airstones last far longer with less back pressure than conventional hobbyist grade “bonded” airstones. The #AS.4 is compact enough to fit inside Hydro-Sponge filters with minimal water flow restriction due its small size. For higher air/water flow in the largest Hydro V use the #AS.6L

Round Ball type or ASL series are an excellent choice for large Aquariums, Ponds or larger holding vats. Their extremely large diameter provides the lowest resistence with increased outputs. Combine with any of our LPH series Air Pumps for superior  aeration in high density conditions. Extended square bumpers on ASL diffusers protect them from damage.

For ease of maintenance use the rubber membrane type diffusers. These will not clog due to the flexible rubber membranes which continuously self cleans its pores.

Item #

Image

Description

Price

Cylindrical Ceramic Air Diffusers

AS.4L

AS4L_100p

3/8” diameter x 7/8” long
standard airline connector

$0.60

AS.6A

AS6A_100p

5/8” diameter x 7/8” long
standard airline connector

$0.79

AS.6LAC

AS6L_100p

5/8” diameter x 1 1/4” long
standard airline connector

$0.95

AS.6L

AS6L_100p

5/8” diameter x 1 3/8” long
standard airline connector

$0.89

AS.6XLA

AS06XLA-150pwm

5/8” dia x 2 3/4” long
standard airline connector
(w/ plastic molded bumpers)

$1.69

AS.7

AS7_100p

3/4” diameter x 1 1/2” long
standard airline connector

$1.05

AS.7L

AS7_100p

3/4” diameter x 2” long
standard airline connector

$1.20

AS.9

AS09-150pwm

7/8” dia x 4 3/4” long
standard airline connector
(w/ plastic molded bumpers)

$4.20

AS110X4

AS110X4-100p

1 1/8” diameter x 4” long
1/4” & 1/2” stepped barb + add-on 3/16” barb
~ 9 LPM max flow

$4.95

AS1.2A1

AS1.2A1_100p

1 1/4 ” diameter x 3” long
x 3/16”& 3/8” connector
 (w/ molded plastic Bumpers)
~ 10 LPM max flow

$4.00

AS1.2B

AS1.2C_100p

1 1/4 ” diameter x 4 1/4” long
x 3/16”& 3/8” connector
 (w/ molded plastic Bumpers)
~ 15 LPM max flow

$4.70

AS1.2C

AS1.2C_100p

1 1/4 ” diameter x 5 1/4” long
3/16”&3/8” connector
(w/ molded plastic bumpers)
~ 18 LPM max flow

$5.40

AS110X6

AS110X6-100p

1 1/8” diamter x 6” long
1/4” & 1/2” stepped barb + add-on 3/16” barb
w/ round rubber  bumpers
~ 14 LPM max flow

$7.95

AS110X10

AS110X10-100p

1 1/8” diameter x 10” long
1/4” & 1/2” stepped barb + add-on 3/16” barb
w/ round rubber bumpers
~ 22 LPM max flow

$12.25

AS112X9

AS112X9a-150pwm

1 1/2” dia x 9” long 
3/8 inlet barb
barb size can be changed:
airline, 3/16”, 1/4” 1/2”
~ 40 LPM max flow

$18.50

Large Ceramic Diffuser Spoke Assemblies
High Volume Ceramic Airstones in a Cross configuration
Center inlet barb fits 3/8” ID tubing or any 1/4 NPT thd fitting
Used in Ponds, Aquaculture, Aquaponics, Hydroponics, Holding Vats.
Molded plastic bumbers keep airstones away from liner or pond bottom.

AS112X7-4X

AS112X7-4X-150pwm

16 1/2” diameter cross pattern
(4)  1 1/2” dia x 7” long 
3/8 inlet barb
(barb can be changed, specify size)
~ 60 LPM rec’d flow

$74.95

AS112X9-4X

AS112X9-4X-150pwm

20 1/2” diameter cross pattern
(4)  1 1/2” dia x 9” long 
3/8 inlet barb
(barb can be changed, specify size)
 ~ 70 LPM rec’d flow

$79.95

Round Ball-type Ceramic Diffusers

ASB100

AS150R-100p

1” diameter ball style
standard airline connector

$0.95

ASB125

AS150R-100p

1 1/4” diameter ball style
standard airline connector

$1.10

ASB150

AS150R-100p

1 1/2” diameter
standard airline connector

$2.25

AS2RA

AS2R_100p

2” diameter
standard airline connector

$3.50

AS2.5RA

AS25R_100p

2 1/2” diameter ball
1/4” and 3/8” tubing connector

$6.95

Disc Style Ceramic Diffusers
Flat Disc provides even bubble dispersion within water column
popular with Hydroponics/Aquaponics installations

ASD2

ASD2-150p

2” dia x 1/2” thick
inlet barb: airline
Molded plastic base encases ceramic disc
rec’d max flow rate: 8 LPM

$4.00

ASD2NB

ASD2NB-150pwm

~2.3” dia x 5/8” thick
stepped inlet barb: airline & 3/8”
no bumper - solid all ceramic

$6.00

ASD3NB

ASD3NB-150pwm

~3.2” dia x 5/8” thick
stepped inlet barb: airline & 3/8”
no bumper - solid all ceramic

$7.50

ASD4

ASD4a-150pwm

~4” dia x 3/4” thick
stepped inlet barb: airline & 3/8”
Molded plastic base encases ceramic disc
rec’d max flow rate: 10 LPM

$5.95

ASD4P

ASD4P-150pwm

~4” dia x 3/4” thick
Ported for high flow: 3/8 inlet”
Molded plastic base encases ceramic disc
rec’d max flow rate: 30 LPM

$10.50

ASD4NB

ASD4NB-150pwm

~4” dia x 5/8” thick
stepped inlet barb: airline & 3/8”
no bumper - solid all ceramic

$8.75

ASD5

ASD4a-150pwm

~5” dia x 3/4” thick
stepped inlet barb: airline & 3/8”
Molded plastic base encases ceramic disc
rec’d max flow rate: 13 LPM

$7.95

ASD5P

ASD5P-150pwm

~5” dia x 3/4” thick
ported for high flow: 3/8” barb
Molded plastic base encases ceramic disc
rec’d max flow rate: 30+ LPM 

$14.95

ASD8

ASD8-150pwma

~ 8” dia x 1.2” thick
1/8 NPT threaded inlet
fitted with brass 9mm barb
Molded plastic base encases ceramic disc
high flow: 50 LPM or more

$27.95

Ceramic Bar Diffusers

AS8BAR

AS8BARa-150pwm

8” long x 5/8” w x 5/8” h
Flat Bar Diffuser
stepped airline barb & 3/8” barb
rec’d max flow rate: 8 LPM

$5.50

Bubble Wand Style Rubber or Plastic Diffusers

ADBW14

ADBW14-150p

Rigid plastic Bubble Wall Diffuser, 14” long
2 part with suction cups to keep submersed

$3.50

ADBWB1

ADBWB2-100p

Flexible rubber membrane diffuser - Bubble wall, 15” long
weighted to stay submersed

$4.50

ADBWB2

same as above

Flexible rubber membrane diffuser - Bubble wall, 24” long
weighted to stay submersed

$6.50

ADBWB3

same as above

Flexible rubber membrane diffuser - Bubble wall, 35” long
weighted to stay submersed

$7.95

ADBWB4

same as above

Flexible rubber membrane diffuser - Bubble wall, 48” long
weighted to stay submersed

$8.75

ADBWB5

same as above

Flexible rubber membrane diffuser - Bubble wall, 60” long
weighted to stay submersed

$11.25

Rigid cast rubber wand type Diffusers

ADR1X20

ADR1X20_crp100p

porous cast Rubber diffuser
1” diameter x 20” long w/ 3/16 tubing connector

OUT

Large Rubber Membrane Diffusers
Membrane diffusers require ~0.5 PSI or greater air pressure to operate which should be considered when sizing air source. Benefits of membrane style is self-cleaning action of rubber membrane. As air is forced through rubber expands and releases any obstruction that may have formed such as algae or calcium/mineral deposit fouling.

ADRS4

ADRS4a100p

1 1/4” diameter x 4” long,
w/ 3/16, 1/4” and 1/2 tubing connectors
~ 15 LPM max flow

$5.50

ADRE118X20

ADRE118Xxx-150pwm

1 1/8” diameter x 20” long,
w/ 3/8” tubing connector
max flow 50 LPM

$22.00

ADRL300

ADRL300-H_100p

2 1/4” diameter x 12” long
w/ 3/4” FNPT threaded connection
~ 1 CFM - 4 CFM max flow

$29.00

ADRL600

ADRL300-H_100p

2 1/4” diameter x 24” long
w/ 3/4” FNPT threaded connection
~ 2 CFM - 5.5 CFM max flow

$39.00

ADRD1

ADRD1-A_100p

Dome type rubber membrane diffuser
9” diameter x 3/4 MNPT pipe thread connection
~ 1 CFM - 4 CFM max flow

$19.00

ADRD2

ADRD2-A_100p1

Dome type rubber membrane diffuser
12” diameter x 3/4 MNPT pipe thread connection
~ 1 CFM - 6 CFM max flow

$22.00

ADR1WBP

ADR1WBP150P

Dome type rubber membrane diffuser
w/ rectangular weighted base
9” diameter x hose barb connection
(specify 1/2”, 5/8” or 3/4”)

$36.50

ADR1BD3

ADR1BD3_04_100p

Dome type rubber membrane diffuser
 w/ integrated 3” Bottom Drain
9” diameter x hose barb connection
(specify 1/2”, 5/8” or 3/4”)

$49.95

PHRW3/8

 

Weighted tubing, 3/8” ID
for connecting diffuser to air pump.
Weighted tubing remains submerged on bottom of pond while delivering air to diffusers. Connect to hose barb fittings use plastic or SS hose clamps

CLICK

PHRW5/8

PHRW58a100p

Weighted tubing, 5/8” ID
for connecting diffuser to air pump.
Weighted tubing remains submerged on bottom of pond while delivering air to diffusers. Connect to hose barb fittings use plastic or SS hose clamps

CLICK

PHRW3/4

 

Weighted Tubing, 3/4” ID
for connecting diffuser to air pump.
Weighted tubing remains submerged on bottom of pond while delivering air to diffusers. Connect to hose barb fittings use plastic or SS hose clamps

CLICK

RGEStxt
Threaded Bleed Exhaust or Air Diffusers:
Used primarily as bleed silencers for Regenerative Blowers to prevent the rushing sound of air escaping.. Can also be used as air diffusers under water by threading directly into PVC pipe or into threaded fittings.

When used as bleed silencers; if sized correctly a separate adjustable bleed valve is not normally needed. Just thread into PVC distribution piping or install anywhere you can place a threaded fitting such as a “Tee”, etc.

Most installations with our smallest blower (1/3 HP) can use one 1/4 exhaust diffuser and have adequate bleed to prevent excessive back pressure on this size blower. Larger blowers such as 1/2HP or larger may need 2 or more of the 1/4” size. The Largest Blowers may need to use 1/2” size with a throttling valve to control amount of bleed. All installations are different and you should inquire if you have any doubt as to how much you need to bleed (if any).

NOTE: When using Regenerative Blowers it is important to bleed off excess air if you are under-utilizing the blower. Too much back pressure causes overheating, potential motor damage, potential impeller failure, and excessive electricity consumption (by as much as 40%).

Item

 

Description

Price

RGES-1/8

 

Exhaust Silencer / Air Diffuser, 1/8” NPT

CLICK

RGES-1/4

 

Exhaust Silencer / Air Diffuser, 1/4” NPT

CLICK

RGES-3/8

 

Exhaust Silencer / Air Diffuser, 3/8” NPT

CLICK

RGES-1/2

 

Exhaust Silencer / Air Diffuser, 1/2” NPT

CLICK

RGES-3/4

 

Exhaust Silencer / Air Diffuser, 3/4” NPT

CLICK

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