Products / Filtration & softening

Water Filtration, Softening & Reverse Osmosis Systems

Scale buildup, iron staining, sulfur odor, sediment — the everyday reality for a lot of homeowners and facilities in this region. The right treatment equipment makes a measurable difference. Rock City Machine Company has been supplying water treatment equipment across Middle Tennessee since 1902. Whether your supply comes from a municipal system, a private well, or a surface water source, the right equipment improves water quality, equipment longevity, and daily peace of mind.

What Hard Water and Contaminants Actually Cost You

Middle Tennessee water, particularly well water, often carries hardness minerals, sediment, hydrogen sulfide (sulfur), iron, and other contaminants that cause real, ongoing problems. Scale buildup shortens the life of water heaters, dishwashers, and plumbing fixtures. Hard water leaves residue on dishes, laundry, and skin.

The costs add up quietly: higher energy bills from scale-coated heating elements, premature appliance replacement, and the ongoing expense of bottled water. A properly sized and installed treatment system handles these issues at the source.

Water softener control head with filter housings and plumbing

Our Water Treatment Product Lines

Water Softeners

Ion exchange softeners remove calcium and magnesium — the minerals responsible for hardness — and replace them with sodium ions. The result is water that's gentler on pipes, fixtures, appliances, and skin. We carry systems suited to household use as well as high-demand commercial and industrial applications.

Water Filtration Systems

Filtration addresses sediment, chlorine, iron, sulfur, and other substances that affect taste, odor, and water clarity. Depending on the source water and the specific contaminants present, we can recommend the appropriate filter media and system configuration. Multi-stage filtration setups are available for more complex treatment needs.

Reverse Osmosis Systems

Reverse osmosis forces water through a semi-permeable membrane, removing dissolved solids, heavy metals, nitrates, and other contaminants that standard filters don't capture. RO systems are commonly installed at the point of use and are a proven solution for high-quality drinking water in homes, offices, and food service environments.

Commercial and Industrial Water Treatment

Office buildings, schools, restaurants, and manufacturing facilities have water demands that exceed residential-scale equipment. We supply commercial-grade systems designed for higher flow rates and continuous operation. If your facility has specific water quality requirements or regulatory compliance considerations, our team can help identify the right equipment.

Residential and Commercial Applications

Whole-house softeners for homes on well or city water

Under-sink reverse osmosis units for drinking and cooking water

Sediment and carbon filters for well water with iron or odor issues

Combination systems that address multiple contaminants in one setup

High-capacity softeners for facilities with large hot water systems

RO systems for laboratories, food processing, or medical applications

Multi-stage filtration for schools, office buildings, and hospitality properties

Industrial-grade systems for manufacturing processes requiring treated water

Brands We Carry

Established Manufacturers

Stocking this range of manufacturers means we can match the media and control valve to your actual water chemistry rather than defaulting to a single brand.

Get the Right System for Your Water

Not sure what your water actually contains? That's a reasonable starting point, and it's where a lot of these conversations begin. Understanding your source water is the first step toward selecting the appropriate treatment equipment. We're open Monday through Friday, 8:00 a.m. to 4:30 p.m. — no pressure, no unnecessary upsell.

Find a Solution That Works for Your Water

Whether you're dealing with a water quality issue at home, need a pump system evaluated, or are sourcing equipment for a larger project, Rock City Machine has the experience and inventory to help.