Residential Filox-R Filters


Filox-R filters for iron, manganese and hydrogen sulfide removal. Advanced high-performance units featuring Fleck 2510 Control, Vortech advanced design mineral tank, and Filox-R, the best iron/manganese/hydrogen sulfide treatment medium on the market. The unchallenged king of iron/manganese/hydrogen sulfide reduction filters.


Above: two views of the 9" x 48" filter. Available in four sizes, designated by the filter tank dimensions: 8" x 44", 9" x 48", 10" x 54", and 12" x 52".

The Filox filter is controlled by the old reliable, tough Fleck 2510 filter valve. It's easy to program—you can change the backwash cycle, for example, by simply opening the hinged face and moving a pin or two—and it lasts forever.

All units in this series come standard with a 1" stainless steel bypass valve. This makes installation and service a snap. The bypass lets you easily divert water around the filter when filtered water isn't needed (for lawn watering, for example).

Why Filox?

Filox-R™, a specially prepared filter medium for the reduction of iron, hydrogen sulfide and manganese from well water, clearly outperforms the other filter media that are most commonly used for these contaminants.

Filox-R™ is a superior performer because of its very high manganese dioxide content. Manganese dioxide is the active ingredient of all leading iron/manganese reduction systems. Filox-R™ consists of 75% to 85% manganese dioxide. By contrast, Manganese Greensand is 3% and Birm is 1% manganese dioxide. The high manganese dioxide content produces a much more active and energetic medium — therefore, a much more effective product.

Because of its superior performance potential, Filox supports a significantly higher service flow rate per bed size and can therefore be used in smaller filters than Birm and Greensand. An 8" diameter Filox filter actually exceeds the service flow capacity of a 10" diameter Birm or Greensand filter. Furthermore, Filox-R has an expected lifespan that is 7500 times that of Birm. (Greensand can be expected to last 50 times as long as Birm.) Filox-R also has superior particle strength which makes it hold up better than other media during the frequent backwashing required of iron filters.

Filox-R™ operates within a much broader pH range than most iron-reduction media. It can be used to treat waters that are significantly lower in pH than Birm. Unlike Birm, Filox-R™ is chlorine tolerant. In fact, it works well with all the standard oxidizing agents (chlorine, potassium permanganate, hydrogen peroxide, ozone, air). (For an explanation of the oxidation/reduction/filtration involved in iron/manganese/hydrogen sulfide reduction, please see our AerMax page and reference pages that link from it.)

Although Filox works well with the standard oxidizers mentioned, which greatly enhance its performance and increase its lifespan, Filox alone, without additional oxidizers, under the right conditions is capable of handling up to 15 ppm (parts per million) iron, 7 ppm hydrogen sulfide, and 3 ppm manganese. Capacity increases greatly with the use of oxidizers as pretreatment.

Filox works excellently with aeration and with chlorination. Both keep the media fresh and assure complete oxidation of iron and sulfide. Unlike Birm, which cannot be used with chlorine, Filox is chlorine tolerant. Since Filox has a much wider window of pH acceptability (5.0 to 9.0, according to the manufacturer, as compared with 6.8 and up for Birm), using Filox often makes it unnecessary to add pH amendment to the iron removal system. The wider pH range also makes it much easier to predict success from an iron filter when the pH is in the mid-6 range. The life expectancy of Filox is essentially unlimited (except in extreme iron conditions); Birm filters are commonly rebedded every two or three years.

Why Not Filox?

If Filox is so great, why doesn't everyone sell it?

Filox-R™ also has some disadvantages, most of these from the seller's viewpoint. For one thing, it's very heavy. It weighs so much that it can only be packed in half cubic foot (57 lbs.) bags. For UPS shipping, Filox requires special boxing. Birm weighs less than half as much. Filter carbon, by contrast, weighs about 1/4 as much as Filox.

Second, as compared with Birm and Greensand, Filox is very expensive. The wholesale price is almost triple that of Birm.

For disadvantages on the user's side, Filox requires more frequent backwashing than most iron removal media. Except in very light use situations, daily backwashing is much preferred. Therefore, it uses more water and more wastewater disposal space (an important issue for homeowners with septic tanks).

Another disadvantage to the customer is that Filox filters cost more. Not only is Filox media itself more expensive to buy and more expensive to ship, but the hardware of the filters themselves tends to cost more. Because of the increased backwash requirement, we use a control valve upgrade (to the tough, free-flowing Fleck 2510) even on the smaller 8" and 9" filters, where a smaller valve would work fine with Birm. We also make the unit with the superior Vortech™ tank because of its increased backwash flow capability.


Some Comparisons:

Filox-R™ vs. Birm & Greensand

Birm Greensand Filox
Treats Hydrogen Sulfide No Yes Yes
Treats Iron and Manganese Yes Yes Yes
Effective Service Flow Rate for a 10" X 54" Filter 2.75 GPM 2.75 GPM 8.5 GPM
Backwash requirement for a 10" X 54" Filter 5.0 GPM 6.6 GPM in cold water, more in warm water. 8.25 (cold water) to 12 GPM (warm water).
Density 47-50 lbs/ cu. ft. 85 lbs. /cu. ft. 114 lbs./cu. ft.
pH Range of Operation 6.8 and up 6.2-8.5 5.0-9.0
Chlorine Tolerant No Yes Yes

Residential Filox Filters We Offer

The backwashing Filox-R™ filters listed below cover service flow rates up to 11.5 gallons per minute. This is plenty for most residential users. We can supply larger filter upon request. Please call if you need a larger filter.

The filters below have in common:

  • All use the tough, free-flowing Fleck 2510 control valve. The valve is a proven performer, designed for simplicity and ease of operation, long service, flexibility and maximum user control. (Backwash and rinse times, for example, can be easily altered.) The valve comes pre-programmed. You need only to set the time of day and plug it in.

  • All filters come with a 1" bypass valve as standard equipment.

  • All filters come with a softener funnel for easy installation of the filter media.

  • All use the advanced Vortech™ mineral tank with superior flow properties. This tank requires no gravel underbedding with Filox.

  • All use pure NSF-Certified Filox-R™ and meet or exceed media load recommendations of the manufacturer.

  • All come with complete instructions and one-year guarantee on parts and workmanship. Tanks and control valve have extended warranties from their manufacturers.


Filox Filter Comparison Chart and Order Form

Note: In the chart below, backwash requirement varies. Cold Water is defined as water less than 60 degrees F. The higher the water temperature, the greater the backwash requirement. The Service Flow Rate is the maximum flow for optimal performance. (Water will go through the filter faster, but at higher rates performance declines.)

Part # Description Media Service Flow Rate in Gallons Per Minute Backwash Requirement in GPM. Price
BW710 8" X 44" Filox Filter. 0.75 Cu. Ft. 4.5 Cold Water: 5.25
Warm Water: 7.7
$725.00 Add to Cart
BW711 9" X 48" Filox Filter. 1.0 Cu. Ft. 6.0 Cold Water: 6.6
Warm Water: 9.7
$833.00 Add to Cart
BW712 10" X 54" Filox Filter. 1.5 Cu. Ft. 8.5 Cold Water: 8.25
Warm Water: 12.1
$941.00 Add to Cart
BW713 12" X 52" Filox Filter. 2.00 Cu. Ft. 11.5 Cold Water: 11.9
Warm Water: 17.4
$1160.00 Add to Cart

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