Air Diffusers

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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

AS.4L

3/8” diameter x 7/8” long x 3/16” tubing connector

$0.60

AS.6A

5/8” diameter x 7/8” long x 3/16 tubing connector

$0.79

AS.6L

5/8” diameter x 1 3/8” long x 3/16 tubing connector

$0.89

AS.7

AS7_100p

3/4” diameter x 1 1/2” long x 3/16” connector

$1.05

AS1.2A1

AS1.2A1_100p

1 1/4 ” diameter x 3” long x 3/16”& 3/8” connector
(w/ molded plastic Bumpers)

$4.79

AS1.2C

1 1/4 ” diameter x 5 1/4” long x 3/16”&3/8” connector
(w/ molded plastic bumpers)

$6.20

Large Round Ball-type Ceramic Diffusers

AS2RA

AS2R_100p

2” diameter x 3/16” airline connector

$4.50

AS2.5RA

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

$6.95

Rigid cast rubber wand type Diffusers

ADR1X20

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

$25.95

Large Rubber Membrane Diffusers

ADRS4

1 1/4” diameter x 4” long,
w/ 3/16, 1/4” and 1/2 tubing connectors

$5.50

ADRL300

2 1/4” diameter x 12” long
w/ 3/4” FNPT threaded connection

$29.00

ADRD1

Dome type rubber membrane diffuser
9” diameter x 3/4 MNPT pipe thread connection

$19.00

ADRD2

Dome type rubber membrane diffuser
12” diameter x 3/4 MNPT pipe thread connection

$22.00

ADR1WB

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

$32.95

ADR1BD3

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

PHRW5/8

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 and plastic hose clamps

$1.20/ft
23’ @ $1.05

RGEStxt

Threaded 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 seperate 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

$2.20

RGES-1/4

Exhaust Silencer / Air Diffuser, 1/4” NPT

$2.55

RGES-3/8

Exhaust Silencer / Air Diffuser, 3/8” NPT

$3.30

RGES-1/2

Exhaust Silencer / Air Diffuser, 1/2” NPT

$5.50

RGES-3/4

Exhaust Silencer / Air Diffuser, 3/4” NPT

$11.95


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