Linear Air Compressors, Diaphragm Compressors and Silent Pond Pumps
The most efficient linear air compressors & diaphragm pumps for pond aeration and other applications where clean, constant oilless air is required.Email us with any questions you have regarding linear compressors There is no charge for our pond services.
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We use mainly these three models of small linear diaphragm pumps and cheap pond pumps so please take the time to understand the limitations and benefits of each one. If you have any questions or need help we will be glad to assist you!

Understanding the concept of building the perfect aeration system means having a basic understanding of the various air pumps, blowers and compressors that are available. The compressor or pump you choose will require some understanding and knowledge as to what you need the pump to do. Every pond diffuser, every length of airline, and every airstone connected to your compressor will require a specific CFM (cubic feet per minute) of airflow as well as a required PSI (pounds per square inch) to overcome the head-loss and internal friction of every foot of tubing and the specific resistance inherent in the diffuser system being used.

One important factor in choosing a silent linear air pump or diaphragm pump is to understand that it requires 1 PSI to push air bubbles to a depth of 28" or 2.3 feet deep. So if your pond averages 6 feet deep then before you even consider the number of diffusers or thetype of diffusers to be used you have to ensure your electric linear air compressor can deliver at least 2.6 PSI. But be careful because each diffuser, whether it is a diffuser disc, an airstone or some sort of homemade diffuser that you want to hook up to your cheap pump, all of them will have a certain resitance that will add pressure requirements to your formula. A single membrane disc diffuser for example can add an extra 12 inches of virtual depth (this means that every disc in your aeration system will demand an extra 0.42 PSI on your compressor) while a high-efficiency glass-bonded diffuser only have a registered air resistance of less than 0.25 PSI.

If you are considering one of these compressors then you likely are not running long lengths of tubing...most of these low pressure systems can pump air through standrad 3/8" and 5/8" for small distances from 50 or 200 feet depending on the compressor. It is only when you need a compressor to push air through several hundred feet of airline you need to cinsider the line loss calulation of airline which is the amount of pressure and friction that builds up against the walls of the tubing and the associated loss of pressure. This means that in a length of 200 feet of tubing you might require an extra 2 PSI to overcome the air volume friction based on the inner diameter of the tubing.

Buy The Best Linear Air Compressors

Highest Reviewed & Best Rated Linear Air Pumps and Silent Linear Air Compressors Linear & Diaphragm Compressor Pumps deliver up to 7 CFM with operating pressure ranges up to 4 PSi. All prices include shipping within continental USA.

Diaphragm Air Pumps RATED BEST OVERALL VALUE These cheap but reliable outdoor pond pumps provide 2.0 - 8.0 CFM with a maximum operating pressure of 4.2 PSI. With a two-year warranty, these pumps are a great choice for aerating ponds up to 6 feet deep with one to four diffusers. These tough air compressors can feed 1 to 5 pond diffusers or airstones (according to CFM requirements) in a pond up to 8 feet deep. Best longevity is delivered when operating pressure is between 2.2 and 3.5 PSI ...see the operating curve chart below to design your homemade aeration system using these pumps or send us an email with questions. Run one or more diffusers or airstones with these pumps! I have so many clients ask where to get a long lasting air pump to run a few diffusers and have found a good line of imported, outdoor rated air pumps and I finally found a line that I think outperforms many models that I have reviewed. These are sturdy, very reliable, and quiet air pumps that will provide a long service life and they have a two-year warranty which isn't bade because I've tried many diaphragm pumps that seem to need a diaphragm repair kit every 6 months! Built for outdoor use, keep it protected to prolong the average life-expectancy. You don't need anything fancy; just build a small box, preferably with ventilation (small fan) to keep your pump out of the snow, rain and away from the gnawing teeth of muskrats, beavers or other pond creatures. They are designed for outdoor use but why not protect your investment? WhiteH20™ pumps deliver a more-than-modest output from 1.8 to 7.9 cfm (50 to 223 lpm) of oil-free air with a maximum pressure of 4 psi. Remember that each 2.3 feet of water is 1 PSI so with a max dishcharge of 4PSI you can pump air to a maximum of 9 feet with the larger model...but this doesn't include resistance from the diffusers you are using or the friction loss from the tubing etc. Each pump has a 3/4" barb outlet and grounded power cord (5 ft). UL-listed. Two-year warranty. Use the specification curves of each model pump to determine how many diffusers can be used with each pump as each type of diffuser (silica bonded stone, membrane, pourous granite) will have varying resistance. With these pumps the best advice I can give is that they will last longer if they are not subject to a working pressure of more than 2 PSI for models TL 401 & 1201 and not more than 3 PSI for models TL 661, 1601 & 1801 so adjust your airline lengths and air diffusers accordingly. If you are unsure then please contact us before you buy. 201™ Silent Pond Air Pump by WhiteH20™ $169 Includes shipping within USA. Model # PR-TL201 2.0 CFM (cubic feet per minute) at 3 PSI = 60 LPM (liters per minute) MAX RATED 4 PSI Great little pump for deep water! Virtually silent with a rugged aluminum housing. Imported, 6-month warranty. At max rated pressure of 4 PSI (8 feet) this pump delivers 2 CFM. Power consumption = 15 Watts | 7 Pounds Ship Weight | 110V/120V | Not UL Listed | 4 Foot Power cord and 3/8" outlet. Recommended Max. Operating Depth for pump longevity = 4 feet. Recommended Diffusers = 1 - 2 Diffusers/Airstones with a min. combined CFM requirement of 0.5 - 2 CFM. Use with 3/8" tubing (weighted or non-weighted). Max recommended tubing run is 50 feet total to prevent back-pressure and reduced pump lifespan. 301™ Silent Pond Air Pump by WhiteH20™ $199 Includes shipping within USA. Model # PR-TL301 3.0 CFM (cubic feet per minute) at 4 PSI = 80 LPM (liters per minute) MAX RATED 5 PSI Great little pump for deep water! Virtually silent with a rugged aluminum housing. Imported, 6-month warranty. At max rated pressure of 5 PSI (10 feet) this pump delivers 2.47 CFM. Power consumption = 25 Watts | 9 Pounds Ship Weight | 110V/120V | Not UL Listed | 4 Foot Power cord and 3/8" outlet. Recommended Max. Operating Depth for pump longevity = 5 feet. Recommended Diffusers = 1 - 4 Diffusers/Airstones with a min. combined CFM requirement of 0.5 - 3 CFM. Use with 3/8" tubing (weighted or non-weighted). Max recommended tubing run is 50 feet total to prevent back-pressure and reduced pump lifespan. Recommended Airstones & 3/8" Tubing options For the PR-TL201 & PR-TL301 Silent Air Pumps 6" Airstone with barbed 3/8" hose connector - $30 Each Includes shipping within continental USA. Air Diffuser, 6" L x 1.5" W, 3/8" O.D. barb (9 mm). Normal airflow range is 0.5 CFM. 0.75 lbs each. Self weighting when using normal tubing lengths Item # PR-SAS61 Use 1 to 2 with PR-TL201 Silent Pond Air Pump Use 1 to 4 with PR-TL301 Silent Pond Air Pump These are highest-quality ceramic-type air diffusers machined from a solid block of glass-bonded silica. Because dust and dirt particles up to 30 microns in size will pass right through these diffusers, there's no need for expensive air filters. And with an air resistance of less than .25 psi, these glass-bonded diffusers are compatible with economical low-pressure blowers. They produce a uniform medium/fine bubble and are very resistant to clogging. And when cleaning does become necessary because of a buildup of calcium precipitate or bacteria, an acid bath restores them to like-new performance. Made in USA. With their round grain pore structure, low resistance to airflow, uniform porosity and resistance to clogging, these airstone diffusers are clearly the best diffusers available for general aquaculture aeration. Smaller pores don't necessarily produce smaller bubbles. These diffusers are engineered to produce the smallest bubble possible within the constraints of a reasonable service life. In most soft water applications, they won't need to be cleaned for more than a year. Note that water pH in excess of 9.0 will shorten the diffuser life. Self-weighting when used with typical tubing lengths. 3/8" Weighted Airline - $109 50' Roll Item# PR-38AIR50FTROLL Includes shipping within continental USA. Ideal for smaller aeration systems requiring self-sinking tubing in smaller pond and water gardens. Uses standard Stainless Steel clamps and PVC barbed hose connectors (not included but available locally at your hardware store). Perfect for the PR-TL201 & PR-TL301 Silent Air Pumps. If you want to buy an inexpensive airline you can check your local hardware store. Our weighted airline is more flexible than plastic, vinyl or standard PVC airhose but also more expensive. If it makes more sense to buy the cheap stuff locally then do it! The weighted airline can be buried and sinks out of sight when in the pond. If you are connecting this to the PR-TL201 and PR-TL301 and are using more than one diffuser you will need some sort of line splitter. This is a simple set-up that you can do yourself. Basically the main 3/8" line from the compressor must have a ball valve to control flow and pressure if you wish to divide the main line and feed multiple diffusers.We have these assmblies available if you'd prefer not to build your own: Splitter/Control Valves for 3/8" Tubing Only Use these splitters to divide the main airline from the PR-TL201 & PR-TL301 Silent Air Pumps into multiple airstones, or build one yourself! 2-Way Splitter - $109 One 3/8" barbed input and two qaurter-turn control valves with two 3/8" outputs (6 stainless hose clamps included). 3-Way Splitter - $129 One 3/8" barbed input and three quarter-turn control valves with three 3/8" outputs (8 stainless hose clamps included). 4-Way Splitter - $149 One 3/8" barbed input and four quarter-turn control valves with four 3/8" outputs (10 stainless hose clamps included).     Secure Shopping with Credit Card or Paypal® using the Secure Servers of Paypal® DIAPHRAGM AIR PUMPS 401™ Diaphragm Air Pump by WhiteH20™ $325 Includes shipping within USA. Model # PR-TL401 1.8 CFM (cubic feet per minute) = 50 LPM (liters per minute) MAX 3 PSI At max rated pressure of 3 PSI (6.9 feet) this pump delivers 0.7 CFM. Power consumption = 35 Watts @ 2 PSI | 15 Pounds Ship Weight | 110V/120V | UL Listed | 5 Foot Power cord and 3/4" adaptor. Recommended Max. Operating Depth = 4 feet. Recommended Diffusers = 1 - 2 Diffusers with a min. combined CFM requirement of 0.5 - 1.5 CFM. Linear Air Compressors RATED BEST DURABILITY IN LARGER & DEEPER PONDS High-pressure (4 - 7.5 PSI), ultra-low power consumption, and an industry-leading three-year warranty. They provide between 2.2 - 6.5 CFM. Aerate a pond up to 14 feet deep with these quiet and long-lasting air pumps. With a higher PSI output and much lower watts than any pond pump or compressor on the market these cheap air compressors have become our favorites when the pressure requirements are beyond the WhiteH20™ models listed above. With the smart and efficient motors in these UL-Listed and CE-Approved pumps, pond aeration systems just keep getting easier and any home-made do-it-yourself aeration system will be trouble-free with with these long-lasting and powerful linear air pumps. The linear air pumps used by ThePondReport.com average about 40% more airflow and about 20% lower 110/115 V power consumption than similar models. 230V is also available for the same price. Specify your power needs by email when ordering. You will see similar looking air pumps imported from Asia like pumps from China or Tiawan Made pumps but the SweetH20® brand is significantly different and while we don't want to insult any manufacturer...these pumps are the best available!. These are designed for 60-Hz (North American) operation to produce maximum efficiency (we also can provide 50-Hz models for export). These linear compressors model permit continuous operation exceeding 3 years in normal continuous usage! The only maintenance required is minimal: Simply clean the air inlet filter as needed with a few sharp breaths, a vacuum passage or according to the included instrcution manual. As with all of our oiless pond aeration air pumps there is no need for lubrication, and the included outlet air is always clean. Besides being ultra-efficient they are also super-quiet. These units are often found in University classrooms, pet store or laboratory or anywhere, including the pond, where clean efficient pumps are a must! Each long-lasting pump uses a heavy, cast-aluminum, drip proof housing. Standard models are 115V/60 Hz with 6' power cords. UL-listed and CE-approved. Three-year warranty (does not include filters or diaphragm). Available in 230 V and 50 Hz by special order only. To maximize the life of these linear compressors it is best to keep the unit in a shed or build a small structure like a doghouse to hold it from the elements. By operating your pump within the correct pressure range (we like to stay about 25% less than the maximum PSI rating of the model) you will greatly reduce the need for changing diaphragms, heads or valves. Purchasing a repair kit, despite your best installation intentions, is not a bad idea. If all parameters of the pumps are respected you may need to change the diapghrams once every 24 to 48 months but it's easier to have one on hand in your tool-shed instead of buying your repair kit online after a break-down as often fish don't take a fancy to being a week without air! Because these pumps have an available repair kit they are our highest reviewed pond aeration pump. 561™ Linear Air Pump by SweetH20™ $425 Includes shipping within USA. Model # PR-SL561 2.2 CFM (cubic feet per minute) = 63 LPM (liters per minute) MAX 5.5 PSI At a pressure of 4 PSI (9.2 feet) this pump delivers 0.8 CFM. Power consumption = 50 Watts | 15 Pounds Ship Weight | 110V/120V | UL Listed, CE-Approved | 6 Foot Power cord and 3/4" adaptor. Recommended Max. Operating Depth = 8 feet Recommended Diffusers = 1 - 2 with a min.. combined CFM requirement of 1 - 2.0 CFM. Diaphragm Repair Kit for 561 Model - $115 Includes Heads, Valves and Diaphragms for complete repair/rebuild When you notice airflow is reduced it's time for a Repair Kit. Operating your pump within the optimal rpressure range prolongs diaphragm life-expectancy. 941™ Linear Air Pump by SweetH20™ $529 Includes shipping within USA. Model # PR-SL941 4.3 CFM (cubic feet per minute) = 122 LPM (liters per minute) MAX 6.8 PSI At a pressure of 5 PSI (11.5 feet) this pump delivers 1.4 CFM. Power consumption = 90 Watts | 16 Pounds Ship Weight | 110V/120V | UL Listed, CE-Approved | 6 Foot Power cord and 3/4" adaptor. Recommended Max. Operating Depth = 11 feet Recommended Diffusers = 1 - 4 with a min. combined CFM requirement of 1.0 - 4.0 CFM. Diaphragm Repair Kit for 941 Model - $135 Includes Heads, Valves and Diaphragms for complete repair/rebuild When you notice airflow is reduced it's time for a Repair Kit. Operating your pump within the optimal rpressure range prolongs diaphragm life-expectancy. 1701™ Linear Air Pump by SweetH20™ $875 Includes shipping within USA. Model # PR-SL1701 6.5 CFM (cubic feet per minute) = 185 LPM (liters per minute) MAX 7.5 PSI At a pressure of 6 PSI (13.8 feet) this pump delivers 2.0 CFM. Power consumption = 150 Watts | 30 Pounds Ship Weight | 110V/120V | UL Listed, CE-Approved | 6 Foot Power cord and 3/4" adaptor. Recommended Max. Operating Depth = 14 feet Recommended Diffusers = 1 - 4 with a min. combined CFM requirement of 1 - 6.0 CFM. Diaphragm Repair Kit for 561 Model - $195 Includes Heads, Valves and Diaphragms for complete repair/rebuild When you notice airflow is reduced it's time for a Repair Kit. Operating your pump within the optimal rpressure range prolongs diaphragm life-expectancy. 9" Membrane Disc Diffuser - $50 Includes shipping within continental USA. Normal airflow range is 0–5 cfm. Equipped with 3/4" MNPT. Single disc or multiple discs can be used with linear air pumps, piston pumps, rotary vane pumps or regenerative blowers. Ideal for everything from small ponds to large lakes. Item # PR-ED3271 More Diffusers & Airstones 5/8" Weighted Airline - $135 50' Roll Includes shipping within continental USA. Ideal for aeration systems requiring long lengths in lake, pond and water garden aeration systems. Uses standard Stainless Steel clamps and with or PVC connectors (not included but available locally). 5/8" tubing works great with 1/2" PVC barbed connectors. More Tubing Lengths & Sizes 6" Airstone with barbed 3/8" hose connectors - $90 PACK OF 4 AIRSTONES Includes shipping within continental USA. Air Diffuser, 6" L x 1.5" W, 3/8" O.D. barb (9 mm). Normal airflow range is 0.5 CFM. 0.75 lbs each. Self weighting when using normal tubing lengths Item # PR-SAS6 (Pack of Four Airstones) These are highest-quality ceramic-type air diffusers machined from a solid block of glass-bonded silica. Because dust and dirt particles up to 30 microns in size will pass right through these diffusers, there's no need for expensive air filters. And with an air resistance of less than .25 psi, these glass-bonded diffusers are compatible with economical low-pressure blowers. They produce a uniform medium/fine bubble and are very resistant to clogging. And when cleaning does become necessary because of a buildup of calcium precipitate or bacteria, an acid bath restores them to like-new performance. Made in USA. With their round grain pore structure, low resistance to airflow, uniform porosity and resistance to clogging, these airstone diffusers are clearly the best diffusers available for general aquaculture aeration. Smaller pores don't necessarily produce smaller bubbles. These diffusers are engineered to produce the smallest bubble possible within the constraints of a reasonable service life. In most soft water applications, they won't need to be cleaned for more than a year. Note that water pH in excess of 9.0 will shorten the diffuser life. Self-weighting when used with typical tubing lengths. 9" Airstone with 1/2" NPT connectors - $150 PACK OF 4 AIRSTONES Includes shipping within continental USA. Air Diffuser, 9" L x 1.5" W, 1/2" NPT connector. Normal airflow range is 0.75 CFM. 1.35 lbs each. Self weighting when using normal tubing lengths Item # PR-SAS9 (Pack of Four Airstones) These are highest-quality ceramic-type air diffusers machined from a solid block of glass-bonded silica. Because dust and dirt particles up to 30 microns in size will pass right through these diffusers, there's no need for expensive air filters. And with an air resistance of less than .25 psi, these glass-bonded diffusers are compatible with economical low-pressure blowers. They produce a uniform medium/fine bubble and are very resistant to clogging. And when cleaning does become necessary because of a buildup of calcium precipitate or bacteria, an acid bath restores them to like-new performance. Made in USA. With their round grain pore structure, low resistance to airflow, uniform porosity and resistance to clogging, these airstone diffusers are clearly the best diffusers available for general aquaculture aeration. Smaller pores don't necessarily produce smaller bubbles. These diffusers are engineered to produce the smallest bubble possible within the constraints of a reasonable service life. In most soft water applications, they won't need to be cleaned for more than a year. Note that water pH in excess of 9.0 will shorten the diffuser life. Self-weighting when used with typical tubing lengths. Secure Shopping with Credit Card or Paypal® using the Secure Servers of Paypal® Looking for turn-key, packaged aeration systems? We've built some all-inclusive packages that include tubing, diffusers and air pumps so you can concentrate on other things besides figuring out how to get everything you need to your door cheaply! Click here to see our complete systems. Of course, if you have any questions about aeration or you need help designing a complete system then pelase send an email and tell us about your project so we, as active pond consultants, can steer uyou in the right direction. Email Here Small Pond (up to 10,000 gallons) Aeration System - $575 Includes shipping within continental USA. System includes the linear compressor, 25 feet of weighted airline, one bottom diffuser, clamps and connectors and instruction manual for the complete installation. Item # PR-KPA1-3 Ideal for ponds up to 10,000 gallons or koi/fish ponds with up to 100 pounds of fish. Oilless AC linear diaphragm compressor: 2 CFM @ 1PSI and 1.5 CFM at 2 PSI :: Max Op. Depth = 8 feet :: USES ONLY 50 WATTS - 1 Year Warranty

Read more about the importance of aeration & to see more of our complete aeration systems. Have a larger pond? Need advice on an aeration project? Send us an email describing your pond and tell us about what you need. Gauranteed response! We serve individual private pond owners as well as associations, corporations and municipalities. Secure Shopping with Credit Card or Paypal® using the Secure Servers of Paypal®