20" x 2.5" Tankless Water Heater Filter Replacement Cartridge - Protect Against Sediment and Scale Buildup

The Premiere AMF-SDR520 is the ideal replacement water filter cartridge for tankless water heater filter systems including the AMF-20S. It’s a premium cartridge that removes sediment from the water and contains genuine Siliphos®, a corrosion and scale inhibitor. A tankless water heater filter with scale inhibitor protects the heat exchanger in your tankless water heater and helps avoid tank failure. Recommended for commercial and residential tankless water heaters and boilers from such brands as Bosch, Navien, Noritz, Paloma, Raypak, Rheem, Rinnai, Stiebel Eltron, Takagi, and more. Tankless units can become easily damaged by the sediment in the water supply, so this filter provides protection against sediment, scale, and hard water.

The AMF-SDR520 is a tankless water heater replacement cartridge for the following systems:

• Falksen Water Systems: FAL-tHT-SS-HFC-100 (takes 4 filters), Heater Treater Models FTHT-20-REVFLO and FAL-FtHT-20-REVFLO-G
• House Pure: HousePure Secure Tankless Water Heater Protection .75
• Premiere Sales: AMF-20S, SS820, SS210-TWH
• Or any standard water filter housing that fits small diameter (≈ 2.5") 20 inch water filter cartridge

The AMF-SDR520 is also an upgraded replacement filter for:

• Falsken Water Systems: FAL-FtHT-20RF
• Stiebel Eltron Tankless Water Heater House Pure Scale Sediment Replacement Filter (Model # 581332)

• Premium water filter cartridge with scale inhibitor to protect your heat exchanger and avoid tank failure
• Removes sediment, sand, dirt, silt, rust, and other particles as small as 5 micron
• Siliphos scale control product prevents scale and stops corrosion. It works by forming a thin protective layer on the metal surface to inhibit the deposition of scale and corrosion on your tankless water heater
• Rigid construction with 68 deep grooves. The deep grooves increase surface area, enhance contaminant holding capacity, and promote fuller utilization of the depth-matrix for fewer cartridge change outs
• Reduces unloading at high differential pressure
• Made without adhesives, binders, surfactants or lubricants for compatibility in a wide range of applications and operating conditions
• The differences between our tankless water heater filter cartridge and other suppliers is the 5 micron absolute rating, deep grooves, and use of the most effective scale control formula. Don't settle for inferior cartridges with no track record!
• Protect your investment- Premiere Sales is the original supplier of this enhanced product for water scale protection
• With over 30 years experience and thousands of systems in the field, this product is the most recommended by boiler, water heater, and tankless water heater manufacturers
• The solution for boiler, water heater, and tankless water heater scale protection
• Recommended for tankless commercial and residential water heaters, and boilers from brands such as Bosch, Navien, Noritz, Paloma, Raypak, Rheem, Rinnai, Stiebel Eltron, and Takagi
• Tested to NSF standards – NSF International, one of the most respected independent certification organizations, rigorously tests products to comply with all standard requirements

• Micron rating: 5 micron
• Flow rate: 16 gallons per minute
• Size: 2.58" D x 20" L
• Max water temperature: 100° F

Please refer to your unit’s manual for specific instructions. General guidance for replacing a water filter cartridge is as follows:

1. Turn off the water supply: Locate the main water valve. Turn it clockwise to shut off the water supply.

2. Release pressure: Depress the red button on the top of the unit to release pressure.

3. Remove the old cartridge: Place a bucket under the filter housing to catch any water spills. Slide the filter wrench up towards the head and turn it to the left to unscrew the housing. Carefully remove the housing and take out the old filter cartridge.

4. Clean the housing: Wipe the inside of the housing clean.

5. Insert the new cartridge: Place the new filter cartridge into the housing.

6. Lubricate the O-ring: Apply a small amount of lubricant to the O-ring to ensure a good seal.

7. Reassemble the housing: Screw the housing back onto the head by turning it to the right.

8. Turn on the water supply: Turn the main water valve counterclockwise to restore the water supply.

9. Check for leaks: Open a faucet to let the water run and check for any leaks around the housing.

What contaminants does this filter remove?

The filter removes sediment, sand, dirt, rust, and other particles down to 5 microns. Also helps prevent scale buildup and corrosion.

How often do I need to replace this water filter?

Once per year. Some folks may have to replace more frequently depending on incoming water quality and high usage.

How does the scale inhibitor work?

The Siliphos® scale control product forms a protective layer on metal surfaces, preventing scale buildup and corrosion.

What systems is this filter compatible with?

Premiere AMF-20S, SS210-TWH, and all other standard sized 20” small diameter housings that accept 20” x 2.5” replacement cartridges.