Our FAQs are divided into two categories: Professionals and Homeowners.

For Homeowners - Our Homeowner's Specification Sheet can be found HERE.

Find answers to some of our most frequently asked questions below:

FAQs for Professionals

Most technical information is available on this website. Click on the Technical Library tab. If you have questions or want additional information contact the distributor in your area, or feel free to contact us directly at info@fujicleanusa.com, or call our office: 207-406-2927.

No. Both airlift pumps use pressurized air (from the blower) to carry water via ascending bubble fluid pressure. The discharge airlift pump lifts treated effluent from the treatment tank to the disinfection chamber but depends on gravity to carry it to a subsurface disposal system. You must specify a separate discharge pump for pumping effluent if head is necessary.

Currently, Fuji Clean offers a separate pump station constructed to our specifications. In the near future, we will offer a built-in pump station chamber which can accomodate pumps of various sizes. Please contact us for more information.

Fuji Clean standard hydraulic sizing assumes domestic strength influent (i.e. about 250 mg/L BOD and 150 mg/L TSS). Models to treat higher strength waste streams are upsized linearly based on organic loading strength. For a site with 2x domestic strength would require a Fuji Clean system with 2x hydraulic capacity.

Fuji Clean offers professional engineer assistance free of charge for all non-standard systems – especially higher strength and higher flow systems. Designers and engineers are strongly encouraged to take advantage of this service.

During standard operation, flows fluctuate between high and low level bands.  Capacity above high water may vary depending on riser height, but is as follows assuming no riser capacity and no pump station:








Storage Capacity above HWL (Gal)







Storage Capacity above HWL (Gal) with one  12” risers













Storage Capacity above HWL (Gal) with two  12” risers













Yes. Air blower operation is independent of hydraulic flows. Please refer to the Design Specification Table for power consumption detail.

Decibel levels for all blower models offered by Fuji Clean are provided in the table below. In general, noise from the FujiMAC "R" series line places Fuji Clean blowers as best-in-class category. Blower sizing typically depends on Fuji Clean treatment system model. Please refer to the Design Specification Table for detail.

MACBlower Model

Operating Decibels


 40 dB


  42 dB 


 40 dB


 42 dB


 41 dB


44 dB


45 dB

The following table provides empty tank buoyancy information for Fuji Clean residential system models. As stated in the Fuji Clean Installation Manual, for uplift restraint in high groundwater sites we recommend:

a. Anchoring the tank using precast concrete anchors (deadman) and 1-inch galvanized coated strapping or equivalent. Set deadman 12" away from tank. Please do not use lifting lugs with turnbuckles to anchor tank as special fittings are required for this. Please contact Fuji Clean USA for additional details.

b. Pour concrete collar positioned just above tank mid-seam.

Empty Tank Buoyancy

Fuji Clean Model


Concrete Restraint (CY)

Model CE5

5,270 Lbs.


Model CE7

7,210 Lbs.


Model CE10

10,400 Lbs.


Model CEN5

7,210 Lbs.


Model CEN7

10,400 Lbs.


Model CEN10 

14,500 Lbs.


Fuji Clean USA requires that sludge be measured at each 6-month service visit. As directed in the Fuji Clean O&M Manual, system pumpout should occur when sludge levels reach 35" in the sedimentation chamber (first chamber) or 16" in the anaerobic chamber (middle chamber). Based on "normal" full time household water use, Fuji Clean estimates that a pumpout should be required about once every 2+years. A higher pumout frequency will be required with high hydraulic or organic strength influent – particularly if a garbage disposal is being used.

Fuji Clean USA offers multiple alarm/control panel options. Our most basic panel with telecommunication capacity is our "C" panel, which is equipped with auxiliary alarm contacts that can be connected with a SJE Tank Alert System, which communicates with a Wi-Fi system to provide remote notification of alarm conditions. A summary of this system is provided in our Technical Library.

All Fuji Clean systems come equipped with a chlorine dispenser with an adjustable dispensing rate mechanism. Recognizing that chlorine is not allowed in many states, Fuji Clean's NSF245 testing configuration included a post treatment Salcor Model 3G disinfection unit. The CEN5 system with one Salcor 3G disinfection unit meets Washington State standards. An NSF fecal report is available upon request. Please contact Fuji Clean USA for additional information.

Assuming a recommended start-up configuration (2/3 clean water, 1/3 septic), Fuji Clean systems achieve NSF40 standards within approximately 1-2 weeks of operation, understanding that there are many variables that contribute to start-up performance.

The Fuji Clean system is designed to accommodate variable flows via the recirculation airlift pump, which has a built in mechanism for leveling variable flow to maximize retention time and treatment. Research shows that the average effluent flow rate for Fuji Clean residential systems is 0,82-gpm. (Please contact Fuji Clean for details). For extreme variable flows (such as in a church situation where there is a very large peak flow one day a week), we recommend the installation of a preceding settling tank large enough to accommodate total peak flow and metered or dosed flow to the system throughout the unused periods.

Yes, as noted in the Fuji Clean USA Installation Manual, we recommend insulating the upper half of the system tank, discharge pump (if applicable) discharge line and d-box for all installations in cold climate environments. Recommended insulation is 2-inch rigid foam board (R-10 insulating factor) covering the system and about 6" over discharge lines to thwart frost penetration.
Fuji Clean recommends that this "cold climate" procedure be followed within the USDA Zones 3-6. A sample map and further information about these zones can be obtained at: www.usna.usda.gov/Hardzone/ushzmap.html.

Our largest single system that we keep in stock is the Fuji Clean CE30 system, capable of treating 2,700-gpd. Our largest system available, which typically requires a 90-day lead time, is the CE6KG system, capable of treating 6,000-gpd of domestic strength wastewater. Please contact Fuji Clean USA for more information.

Yes. Please contact Fuji Clean USA for additional details and engineering assistance.

Yes, please refer to page 3 of the technical study for a summary technical explanation of how P removal is accomplished with Fuji Clean CEX and CRX systems. For more details, please contact Fuji Clean USA directly.

Fuji Clean has successfully completed ANSI/NSF 40 and ANSI/NSF 40/245 testing. A summary of results is available in our Technical Library. Please contact Fuji Clean USA directly for detailed information.

Discharges from water treatment systems, such as water softeners or water filtration systems that require back flushing, are high in salt content and should not be considered wastewater nor pumped into a biologic treatment system. Instead, if possible, divert this flow into a separate, properly constructed dry well or directly into a subsurface drainage field (refer to state and local codes).

Yes. Our CEN model line (tested for NSF 40 & 245) will provide single digit BOD and TSS results (as well as highest quality TN removal) with domestic strength wastewater as demonstrated in NSF and field testing. A summary of NSF testing results is available in our Technical Library. Please contact Fuji Clean USA for field testing data or additional details.

FAQs for Homeowners

Typically local regulations and soil conditions of your unique home site may dictate the need for a treatment (sometimes called "pretreatment") system. Your Fuji Clean treatment system accepts wastewater from your home, cleans it and sends clean water back to the environment (usually into a soil absorption system such as a leach field). The advantage of our process is that our systems do the purification work ordinarily accomplished by the soil, which therefore allows smaller, shallower and less obtrusive drain fields. (Exact field reductions allowed vary by state and region). Additionally, pretreatment greatly extends the life of a drain field since clean water deters solids and biological buildup (biomat) in your soil absorption system.

In some areas, treatment is required by rules and regulations to reduce nutrients such as nitrogen or phosphorus from your waste stream as protection against contamination of ground water and water bodies.

Fuji Clean treatment is powered by air pressure provided by a remote air blower designed to run continuously. The treatment process easily accommodates variable and intermittent flows, including only weekend use, However, for seasonal use properties, the air blower may be shut down if the system is not going to be used for an extended period of time. Ideally, the air blower should be re-started at least three days in advance of system use.

During a power outage, the air blower will cease operation and after about 24-48 hours, treatment quality will begin to slowly diminish (assuming uninterrupted waste stream flow from the house). However, the Fuji Clean system will still allow wastewater to pass through and will not create a backup in the house unless a separate pump station has been installed. Water quality will quickly rebound once power is restored.

Yes, although your Fuji Clean system is designed to require minimal service, it does require semi-annual inspection or service visits from a trained and certified service provider. (This schedule may be altered for seasonal and part-time use). Your certified service provider will review details of your initial service plan included as part of the system warranty (first two years) and extended service plans (after two years).

Like an ordinary septic tank, sludge must be removed from your system periodically (such as once every two years). Your service provider will measure sludge accumulation on each service visit and provide guidance to help arrange for a septic tank pumping company to provide this service when necessary. Pump-out frequency depends on waste stream strength and use. Please consult with your service provider to help determine the frequency that is best for you. Also, please note: use of a garbage disposal usually increases pump-out frequency.

Since your Fuji Clean USA system has been designed to operate continuously, it is easy to calculate power cost. Most standard residential sized units (e.g. CE5, CE7, CEN5) draw 1.2 kWh of power per day. Larger residential sized units, (e.g. CE10, CEN7 and CEN10) draw 1.7 kWh of power per day. Simply multiply your local cost of power by the draw per day to calculate daily power cost. FujiMAC RII blowers, manufactured by Fuji Clean Company power Fuji Clean treatment systems are best-in-class for efficiency and durability and draw minimal power.

Fuji Clean treatment systems will accommodate waste flow from garbage disposals. However, due to the increased organic load you will likely have to pump the sludge from your system on a more frequent basis and your system may require more frequent service visits.
Your service provider should be aware that a garbage disposal is in use and will help you determine the proper service and pump-out frequency.

Your Fuji Clean system is dependent on live bacterial microorganisms to clean wastewater. It is a living culture! Therefore, it is in your best interest to avoid the heavy use of bleach as much as possible. If you must use bleach, use it sparingly and spread out its use over time.

Since your treatment system is a living culture, you should avoid flushing or draining toxic materials into the system such as paint, household chemicals and antibiotic medicines as they can harm the natural bacterial action that is present. Other items to avoid flushing into the system include bulky or non-biodegradable materials in general such as sanitary napkins, paper towels and cigarette butts. Coffee grounds and excessive cooking grease are not helpful to efficient system processing and should be disposed of through your compost/recycle/solid waste stream instead of though your treatment system.

Also, please avoid use of quaternary ammonium-based cleaning products and do not use products that purport to increase septic system health such as Rid-X.

On occasion, a contaminated well may need to be disinfected (usually with Clorox bleach). If you need to do this, do not run the chlorinated water through your septic system. Instead, open the outside water faucets and let the water run for several hours or as long as necessary to flush the chlorine out of the well. Meanwhile, avoid using water inside the house.

No! Toilet tablets and drain-clean products will generally deplete necessary bacteria from the system. Products that advertise drain field health are typically unhelpful to the system and often temporarily emulsify fats, oils and greases, only to have them re-coagulate after they reach the drain field.

Absolutely.  Be sure that plumbing fixtures such as toilet bowl fill valves and faucets are maintained and do not leak.  You would be amazed at how much water passes through the system with a small leak or dripping faucet.  Your system is sized to meet standard flows from your house and therefore any excess flows will not help water treatment. Remember that maintenance of these fixtures also conserves your water.

Your alarm/control panel monitors all important functions of your Fuji Clean system and an alarm (both audio and visual) will be triggered in the rare event of a problem, such as water is not being discharged from the system or your air blower is not operating properly. In the event of an alarm condition, go to the alarm panel, find the toggle switch on the outside right and push toward "silence." This will mute the audio alarm, although the visual alarm light will remain lit. Next, contact your service representative for assistance. The contact information for your service representative should be affixed to your alarm panel.

As a general rule, the more natural the cleaning product the better. Synthetic surfactants designed for toilet bowls for example, which often contain chemicals synthetic dyes, chlorine bleach, ammonia, petroleum-derived ingredients, and other harmful ingredients, such as Triclosan (prevents mold growth) are hazardous to a healthy bacterial eco-system living within your Fuji Clean system. Ideal choices might include white vinegar, Borax, or lemon, which contains citric acid.

Assuming a recommended start-up configuration (2/3 clean water, 1/3 septic), Fuji Clean systems achieve NSF40 standards within approximately 1-2 weeks of operation, understanding that there are many variables that contribute to start-up performance.


Contact Fuji Clean USA today!

Lead Capture Form