Aquasana EQ-SS20 SimplySoft: Complete Buying Guide

Aquasana EQ-SS20 SimplySoft: Full Review

The Aquasana EQ-SS20 SimplySoft is a whole-house, salt-free water conditioning system designed to address hard water problems at the point of entry — meaning it treats all the water flowing into your home before it reaches any fixture, appliance, or pipe. Unlike traditional salt-based water softeners that use ion exchange to actually remove calcium and magnesium ions from the water, the EQ-SS20 uses a process called Template Assisted Crystallization (TAC). In TAC conditioning, the hard water minerals aren't removed; instead, they're converted into harmless, stable micro-crystals that can't adhere to pipe walls, heating elements, or surfaces. The result is water that behaves as though it's been softened — scale stops forming — but the minerals remain in the water in a neutralized form.

Physically, the EQ-SS20 is a single-tank system housed in a compact cylinder that connects to your main water line. The tank is filled with TAC media — a specialized polymer-based material covered in nucleation sites that catalyze the crystallization process. Aquasana rates the media life at approximately 6 years or 600,000 gallons, which is among the longest in the salt-free category and represents a meaningful advantage over competitors whose media may need replacement every 3–4 years. The system handles flow rates of up to 7 gallons per minute (GPM), which is sufficient for a 1–3 bathroom home running multiple fixtures simultaneously without noticeable pressure drop.

Installation is one of the EQ-SS20's genuine strengths. There's no electricity required, no drain line to run, no brine tank to find space for, and no programming involved. You're essentially adding an in-line tank to your main water supply line — a task that many confident DIYers can accomplish in a few hours with basic plumbing tools. Aquasana provides a detailed installation guide, and the system includes the necessary fittings to connect to standard 1-inch supply lines. For those less comfortable with plumbing work, a licensed plumber can typically complete the installation in under two hours, keeping professional fees relatively modest.

The EQ-SS20 is frequently sold as a standalone conditioner, but Aquasana also offers it bundled with their Rhino whole-house filtration system (the EQ-1000 or similar), which adds sediment pre-filtration and carbon-based filtration for chlorine, chloramines, and other contaminants. If your municipal water contains both hardness and chemical concerns, the bundle is worth serious consideration. As a standalone unit, the SimplySoft addresses scale only — it does not filter or remove chlorine, sediment, or any other contaminants.

Who Should Buy the EQ-SS20 SimplySoft?

The Aquasana EQ-SS20 SimplySoft is engineered for a specific type of homeowner, and understanding whether you fit that profile will save you money and frustration. The ideal buyer is someone dealing with hard water problems — scale on fixtures, spots on dishes, reduced appliance efficiency — who wants a set-it-and-forget-it solution that doesn't require ongoing salt purchases, monthly maintenance routines, or a dedicated drain line. It's also compelling for those living in areas where salt-based softeners are regulated or outright banned, such as parts of California, Texas, and several other states with brine-discharge restrictions.

Renters and homeowners in smaller spaces will appreciate the system's relatively compact footprint. Without a brine tank, the EQ-SS20 occupies roughly the same floor space as a large water filter tank — manageable in a utility closet or mechanical room. It's also an excellent choice for homes on septic systems, since there's no salt or backwash water to disrupt septic bacterial balance. Environmentally conscious buyers will value that the system generates zero wastewater and introduces no sodium into the groundwater supply.

However, the EQ-SS20 is probably not the right choice if your primary complaint is the "feel" of your water. People accustomed to ion-exchange softened water often describe it as silky or slippery — that sensation comes from the actual removal of calcium and magnesium ions. The EQ-SS20 leaves those minerals in place in crystallized form; your water will feel more like normal water, just without the scaling consequences. If the sensory experience of soft water is important to you, a traditional salt-based softener or a hybrid system may serve you better.

Households with very high hardness levels — above 25 grains per gallon (GPG) — should also proceed carefully. While Aquasana doesn't publish a hard cutoff, TAC technology is generally recognized as most effective in the mild-to-moderately hard range. Extremely hard water may overwhelm the media's capacity to crystallize minerals fast enough at the unit's rated flow rate. If you're on well water, have your water tested thoroughly before purchase, since iron, manganese, or tannins can foul TAC media and require pre-treatment filters to protect the unit.

Installation & Setup

One of the EQ-SS20's most frequently praised attributes is its installation simplicity relative to traditional softeners. There's no electrical outlet to locate, no drain line to route, no brine tank to position, and no programming interface to configure. The core task is cutting into your main water supply line after the pressure regulator and main shutoff, and adding the SimplySoft tank in-line using the provided connections. Most installations call for 1-inch NPT threaded fittings; if your home uses different sizing, you'll need appropriate adapters.

Aquasana recommends installing the system after your main shutoff valve and pressure regulator but before your water heater and any branch lines — this ensures all water entering the home is conditioned. If you're also installing a whole-house filter (like the Aquasana Rhino), the typical sequence is: main shutoff → sediment pre-filter → whole-house carbon filter → SimplySoft conditioner → distribution throughout the home. This order protects the TAC media from sediment and chlorine that could degrade it prematurely.

The system ships with a bypass valve assembly, which is important both for installation and for future maintenance. The bypass allows you to isolate the SimplySoft tank and restore water flow to your home if you ever need to service or replace the unit without shutting off all household water. This is a feature worth confirming is in your kit before you begin installation. Aquasana provides written instructions and video resources to guide the process, and the community of EQ-SS20 owners online has produced numerous supplemental how-to resources as well.

Maintenance & Operating Costs

The EQ-SS20's maintenance demands are about as low as whole-house water treatment gets. Under normal operating conditions, the primary maintenance task is replacing the TAC media at the end of its service life — approximately every 6 years or 600,000 gallons, whichever comes first. Aquasana sells replacement media cartridges that are straightforward to swap out: the tank opens at the top, the spent media is removed, new media is added, and the unit is back in service. There are no filters to change monthly, no salt to add, no regeneration cycles to schedule, and no brine tank to clean.

If you've installed the SimplySoft alongside an Aquasana Rhino whole-house filter, those filter stages have their own service intervals — typically a sediment pre-filter every 2–3 months and copper-zinc/carbon media every 1,000 gallons or annually — but the SimplySoft itself remains hands-off. It's worth periodically checking the bypass valve and inlet/outlet connections for any signs of leakage, particularly in the first weeks after installation as connections settle and seals seat fully, but this is a visual inspection rather than an active maintenance task.

From a running cost perspective, the EQ-SS20's operating expenses are limited almost entirely to the eventual media replacement. There's no electricity to account for, no salt bags to purchase at $5–$25 per bag every few weeks, and no water waste to worry about — traditional salt softeners can use 25–65 gallons of water per regeneration cycle, adding meaningfully to both water bills and environmental impact. Over a 6-year period, the total cost of ownership for the EQ-SS20 often compares very favorably to a salt-based system when salt, electricity, and wastewater costs are factored in.

Real-World Performance & Effectiveness

The central question most buyers have is simple: does it actually work? The honest answer is: yes, but with important nuance. The EQ-SS20's TAC technology has solid scientific backing and WQA certification for scale prevention, and thousands of owner reviews consistently report that existing scale deposits dissolve over time as conditioned water flows through pipes, and that new scale formation stops or dramatically reduces. Fixtures stay cleaner, water heaters run more efficiently, and appliances like dishwashers and coffee makers accumulate significantly less limescale.

Where the nuance matters is in the subjective water experience. Owners transitioning from salt-based softeners are sometimes disappointed that water doesn't feel "soft" in the tactile sense. This is chemically expected — the minerals are still present — but worth setting expectations around before purchase. That said, many users find they prefer not having the sodium-loaded "slippery" water, particularly for drinking, and they achieve the practical benefits (scale protection, appliance longevity) they were actually seeking.

Performance over time is generally stable, since TAC is a catalytic process — the media facilitates crystallization without being consumed, which is why service life is measured in years rather than months. However, the media can be fouled by certain contaminants, particularly iron above about 0.3 mg/L and heavy sediment loads. This is why Aquasana often recommends the SimplySoft as part of a system that includes a sediment pre-filter, rather than as a truly standalone solution in homes with well water or older, sediment-prone plumbing.

EQ-SS20 vs. The Competition

The salt-free water conditioner market has grown substantially, giving buyers several credible alternatives to the EQ-SS20. Here's how the SimplySoft stacks up against the most commonly compared options across the key decision factors.