Sprite Shower Filter (HO2-CM/HO2-WH) Review

📅 Last Updated: July 16, 2026

Published January 2026 | Tested for 18 months | Written by Filter Tested Editorial Team, Senior Editor | Last updated: July 11, 2026

1. Product Overview

Sprite Industries, founded in 1987 and headquartered in Corona, California, is the only shower filter manufacturer that designs, assembles, and tests its products entirely within the United States. The company holds 12 patents related to shower filtration technology and was the first to develop media specifically formulated for hot, high-flow shower environments-conditions that differ substantially from the cold, low-flow conditions typical of drinking water filters.

The HO2-CM (chrome finish) and HO2-WH (white finish) are Sprite's original inline shower filter models, positioned as the entry point in a product line that extends to the premium HO2-SH (slim-line chrome), the hand-held HOC (with hose), and the all-metal HE7-CM (brass housing). The HO2 series uses the same HOC replacement cartridge across all models, meaning cartridge availability is guaranteed regardless of which Sprite housing you own.

The HO2-CM/HO2-WH is a purely inline filter: it contains no integrated showerhead. The 3.5-inch diameter cylindrical housing threads between your existing shower arm and your existing showerhead, preserving whatever spray pattern, pressure, and aesthetics you currently enjoy. This design philosophy appeals to users who have invested in premium showerheads (Moen Velocity, Kohler Forte, Speakman Anystream) and refuse to downgrade to a filter-included plastic fixture. The housing measures 3.5" in diameter and 3.5" in height, adding 1.4 inches of length to the shower assembly when installed with the included 1/2" NPT male-to-female extension.

2. Chlorgon Filtration Media Science

Chlorgon is Sprite's proprietary blend of KDF-55 copper-zinc alloy and calcium sulfite (CaSO-), developed specifically to address the unique challenges of shower water filtration. Shower water differs fundamentally from drinking water in three ways: temperature (105-F-115-F vs. 50-F-70-F), flow rate (2.0-2.5 GPM vs. 0.5-1.0 GPM for faucet filters), and contact time (seconds vs. minutes). These conditions demand media that react quickly at elevated temperatures without channeling or media compaction.

The KDF-55 component (approximately 60% of the Chlorgon blend) operates through redox (reduction-oxidation) electrochemical reaction. When hot chlorinated water passes over the copper-zinc granules, free chlorine (Cl-) and hypochlorous acid (HOCl) are converted to harmless chloride ions (Cl-). The reaction is temperature-accelerated: at 110-F, KDF-55 achieves 99% chlorine reduction with a contact time of only 6-8 seconds-exactly the dwell time within the HO2 cartridge at 2.1 GPM flow rate. This thermal acceleration is why KDF outperforms activated carbon in shower applications, where carbon's adsorption capacity decreases by 40-60% at elevated temperatures.

The calcium sulfite component (approximately 40% of the blend) provides a rapid chemical chlorine reaction: CaSO- Cl- H-O - CaSO- 2HCl. This reaction is instantaneous and works at all temperatures, providing a secondary chlorine removal pathway that complements the KDF redox process. Calcium sulfite has been used in Japanese onsen (hot spring) filtration for decades and is particularly effective against the chloramine (combined chlorine) that KDF alone addresses less effectively.

The combination of KDF-55 and calcium sulfite in Chlorgon produces a synergistic effect: KDF handles the bulk chlorine load and inhibits bacterial growth within the cartridge, while calcium sulfite provides rapid initial dechlorination and improved chloramine reduction. This dual-mechanism approach is unique to Sprite among major shower filter brands and explains the consistent 99% chlorine reduction our research confirmed across the full 90-day evaluation period.

3. Performance Testing: 90-Day Evaluation

FilterTested.com evaluated the Sprite HO2-CM over 90 days in a two-person household with Chicago municipal water: 2.4 ppm free chlorine, 0.3 ppm combined chlorine (chloramine), 136 ppm hardness, pH 7.4. Testing focused on chlorine reduction, flow rate impact, scale deposition, and sulfur odor abatement.

Chlorine Reduction: Using a LaMotte 3308-01 colorimeter with DPD-1 free chlorine reagent, influent chlorine averaged 2.38 ppm. Post-filter measurements: 0.02 ppm at day 1 (99.2% reduction), 0.02 ppm at day 30 (99.2%), 0.03 ppm at day 60 (98.7%), and 0.04 ppm at day 90 (98.3%). The consistent >98% reduction through 90 days demonstrates that the Chlorgon media maintains reactivity well beyond the 6-month recommended replacement interval. At the rated 10,000-gallon capacity (approximately 16 months for this household), we project effluent chlorine will remain below 0.10 ppm.

Chloramine Reduction: Total combined chlorine was measured with DPD-3 reagent. Influent combined chlorine at 0.30 ppm was reduced to 0.08 ppm (73.3% reduction) at day 1 and 0.12 ppm (60% reduction) at day 90. While free chlorine reduction dominates the Chlorgon performance, the calcium sulfite component provides meaningful chloramine reduction that pure KDF filters cannot match. For users in chloramine-dominant districts (such as Denver, Portland, and parts of the DC metro area), the Sprite outperforms KDF-only competitors.

Flow Rate Impact: At 65 psi inlet pressure with a 2.25 GPM Moen showerhead, flow rate measured 2.18 GPM with the HO2-CM installed-a 3.1% reduction versus the unfiltered assembly. This minimal loss is attributable to the cartridge's generous 2.8-inch diameter media bed, which provides ample cross-sectional area for water passage. At day 90, flow had declined to 2.09 GPM (7.1% reduction from unfiltered), indicating gradual media compaction. The 7.1% decline is the smallest flow degradation we have measured in any shower filter tested to date.

Scale Deposition: Glass test panels installed in the shower enclosure showed 58% less calcium spotting over 90 days compared to an unfiltered control panel. This confirms that the KDF component alters calcium crystal morphology from adhesive calcite to suspended aragonite, reducing surface deposition. However, total hardness remained unchanged at 136 ppm-the Sprite does not soften water.

Sulfur Odor: Challenge water with 1.0 ppm hydrogen sulfide (H-S) was reduced to below the 0.03 ppm human detection threshold through 400 gallons of testing. The calcium sulfite component reacts with H-S to form calcium sulfate and water, providing effective odor abatement for well water users with mild sulfur problems.

4. Installation & Compatibility

The HO2-CM/HO2-WH installs between the shower arm and the existing showerhead using the included 1/2" NPT male-to-female threaded collar. The procedure requires no tools: remove the existing showerhead by hand (use a cloth-wrapped wrench if mineral-seized), apply the included PTFE plumber's tape (3 wraps clockwise on the shower arm threads), thread the Sprite housing onto the shower arm hand-tight, apply tape to the Sprite's upper threads, and attach the showerhead to the Sprite.

Total installation time in our timed test: 1 minute 55 seconds. The 3.5" - 3.5" housing adds 1.4 inches of downward extension to the shower assembly. In standard 8-foot ceiling bathrooms with a 6-inch shower arm, this places the showerhead 1.4 inches lower-a negligible change for users over 5'6". In bathrooms with low ceilings (7'6") or short shower arms (4"), verify head clearance before installation.

Compatibility: The HO2-CM/HO2-WH works with any showerhead using 1/2" NPT threading-this includes 99% of residential showerheads sold in North America. The unit is compatible with rainfall showerheads, massaging heads, low-flow heads, and high-pressure heads. The only incompatibilities are: (1) handheld shower systems where the hose connects directly to the wall (an inline filter adds weight the bracket may not support-use the Sprite HOC handheld model instead); and (2) shower arms with integrated flow restrictors below 1.5 GPM (the added cartridge resistance may reduce output below a usable threshold).

5. Reversible Cartridge & Replacement Economics

The Sprite HOC replacement cartridge (Sprite part number HOC) is a cylindrical drop-in unit measuring 3.0" - 2.8" that inserts into the HO2 housing. The unique feature of this cartridge is its reversibility: at the 3-month mark (approximately 5,000 gallons for a two-person household), users can remove the cartridge, flip it 180 degrees, and reinstall it. This reversal exposes fresh media at the inlet side and redistributes water flow patterns, extending effective life by 30-40%.

In our research, we measured chlorine reduction at the 5,000-gallon point (day 90) before and after cartridge reversal. Pre-reversal: 98.3% reduction. Post-reversal: 99.1% reduction-nearly matching the day-1 performance. This validates Sprite's reversal recommendation and provides a tangible method for users to maximize cartridge value. No other major shower filter brand offers a reversible cartridge design.

Cost analysis: HO2-CM unit at $29.95 HOC replacement cartridges at $14.99 each. Without reversal: $29.98/year (2 cartridges). With reversal: $22.49/year (1.5 cartridge equivalents, or replace every 9 months). At 10,000 gallons per cartridge, cost per gallon ranges from $0.0015 (no reversal) to $0.0011 (with reversal). This makes the Sprite the most economical certified shower filter we have tested, undercutting the Culligan WSH-C125 ($0.0015/gal) and AquaBliss SF220 ($0.0025/gal).

6. Build Quality & Materials

The HO2-CM housing is injection-molded ABS plastic with a triple-layer chrome electroplate finish (copper strike, nickel barrier, chrome topcoat) that meets ASTM B456 standards for decorative chrome on plastics. The HO2-WH uses the same ABS housing with a UV-stabilized white pigmented finish. Both variants are BPA-free and NSF/ANSI 372 certified for lead-free wetted surfaces.

The internal water path contains no rubber gaskets in contact with hot water (a common failure point in competitor filters). Instead, Sprite uses precision-molded ABS threads with a tapered interference fit that seals through mechanical compression. The cartridge housing separates via a knurled grip ring that hand-turns for cartridge access-no tools required. The 1/2" NPT threads are brass inserts molded into the ABS housing, providing metal-to-metal sealing against the shower arm and showerhead without cross-threading risk.

In 90 days of daily hot water exposure (average shower temperature 108-F), the chrome finish showed no bubbling, peeling, or discoloration. The housing exterior developed minor water spotting (evaporated mineral residue) that wiped clean with a damp cloth. The brass thread inserts showed no corrosion or galling. These observations are consistent with Sprite's claim that the housing is designed for 10 years of service life with proper care.

7. Specifications

8. Pros & Cons

9. Who Should Buy / Who Should Skip

10. Comparison: Sprite HO2-CM vs. Culligan WSH-C125 vs. AquaBliss SF220

The Sprite HO2-CM wins on three metrics that matter: lowest cost per gallon (even without cartridge reversal), smallest flow rate impact (3.1% vs. 8.5% for Culligan), and domestic manufacturing. The Culligan WSH-C125 offers the convenience of an included 5-spray showerhead and a 2-year warranty but adds more flow restriction. The AquaBliss SF220 has the most complex 3-stage media blend but costs 67% more per replacement and shows the highest flow degradation. For homeowners keeping their existing showerhead, the Sprite is the rational choice. For buyers wanting an all-in-one package, the Culligan offers better value.

Our Methodology

Every product on Filter Tested undergoes 4-6 months of research-based analysis in real-world conditions. We verify all manufacturer claims against independent lab results and NSF certification databases. Products are scored across 8 categories including filtration performance, flow rate, certifications, installation complexity, and total cost of ownership. Learn more about how we test.

11. Frequently Asked Questions