20" Tankless Water Heater Filter System - High Flow 5 Micron Sediment and Scale Inhibitor for Extended Heater Life and Efficiency

The Premiere AMF-20S tankless water heater filter system includes a heavy-duty, 20 inch water filter housing and our AMF-SDR520 scale inhibitor cartridge (a water filter for sediment and scale). This system removes sediment and protects the heat exchanger in your tankless water heater to avoid tank failure. Designed for all commercial and residential tankless water heaters including Bosch, Navien, Noritz, Paloma, Raypak, Rheem, Rinnai, Stiebel Eltron, Takagi, and more.

• Ideal for large-capacity filtration needs, including high-flow and heavy-sediment applications
• Sturdier filter housing than others on the market — it’s constructed with 15% more material!
• Heavy-duty, food grade plastic housing suitable for drinking water filters
• The extra large housing allows for greater cartridge capacity, reducing the number of vessels required for high flow-rate applications
• Premium 5 micron deep grooved water filter cartridge with scale inhibitor to protect your heat exchanger and avoid tank failure
• Rigid construction with 68 deep grooves. The grooved design increases surface area, extends the water filter cartridge life, and increases water filtration efficiency too!
• 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.
• What makes our tankless water heater filter cartridge superior to 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!
• Built in pressure release valve (PRV), to release pressure before changing filters
• Screw-off lid with wrench for easy changing of the drop-in scale inhibitor cartridge
• 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
• Tankless water heater filter system includes Big Blue filter housing, scale inhibitor cartridge (AMF-SDR520), bracket, and wrench
• 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

• Flow rate: up to 16 gallons per minute
• Pipe connections: 3/4" FPT (female pipe thread)
• Size: 23.5" H X 5.5" D
• Pressure rating: Min 30 psi / Max 75 psi
• Temperature rating: Min 40° F / Max 100° F

Generally, this water filter system is easy to install whether you prefer to do it yourself or hire a local licensed plumbing professional.

AMF-20S Installation Instructions

• Water filter housing
• 5 Micron sediment and scale inhibitor cartridge (AMF-SDR520)
• Bracket
• Filter wrench

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 the water filter cartridge in this system?

Once per year. More frequent replacement may be needed depending on incoming water quality and usage.

What is the replacement water filter cartridge for this system?

Premiere AMF-SDR520

How does the scale inhibitor work?

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

What systems is this filter compatible with?

This filter is compatible with any water heater that requires a flow rate of 16 GPM or less. It is installed before tankless water heaters and is suitable for brands such as Bosch, Navien, Noritz, Paloma, Rheem, Rinnai, Stiebel Eltron, and Takagi.