ZWS vs LIQT vs FELE vs ERII vs XYL

For growth investors, LiqTech International, Inc.

(LIQT) is the stronger pick with 13. 0% revenue growth year-over-year, versus -7. 1% for Energy Recovery, Inc. (ERII). Energy Recovery, Inc. (ERII) offers the better valuation at 22. 5x trailing P/E (22. 9x forward), making it the more compelling value choice. Analysts rate Energy Recovery, Inc. (ERII) a "Buy" — based on 16 analyst ratings — the highest consensus in this comparison. The "better buy" depends entirely on your goals: growth investors should weight revenue trajectory, value investors should weight P/E and PEG, and income investors should weight dividend yield and streak.

On trailing P/E, Energy Recovery, Inc.

(ERII) is the cheapest at 22. 5x versus Zurn Elkay Water Solutions Corporation at 45. 6x. On forward P/E, Xylem Inc. is actually cheaper at 20. 9x — notably different from the trailing picture, reflecting expected earnings growth. The PEG ratio (P/E divided by earnings growth rate) is the most growth-adjusted single valuation metric: Zurn Elkay Water Solutions Corporation wins at 0. 91x versus Franklin Electric Co. , Inc. 's 2. 50x — a PEG below 1. 0 traditionally signals the market is underpricing earnings growth.

Over the past 5 years, Zurn Elkay Water Solutions Corporation (ZWS) delivered a total return of +108.

0%, compared to -96. 1% for LiqTech International, Inc. (LIQT). Over 10 years, the gap is even starker: ZWS returned +435. 0% versus LIQT's -90. 9%. Past returns do not guarantee future results, and the stock with the higher historical return may already have its best growth priced in.

By beta (market sensitivity over 5 years), LiqTech International, Inc.

(LIQT) is the lower-risk stock at 0. 52β versus Energy Recovery, Inc. 's 1. 53β — meaning ERII is approximately 192% more volatile than LIQT relative to the S&P 500. On balance sheet safety, Energy Recovery, Inc. (ERII) carries a lower debt/equity ratio of 5% versus 117% for LiqTech International, Inc. — giving it more financial flexibility in a downturn.

By revenue growth (latest reported year), LiqTech International, Inc.

(LIQT) is pulling ahead at 13. 0% versus -7. 1% for Energy Recovery, Inc. (ERII). On earnings-per-share growth, the picture is similar: LiqTech International, Inc. grew EPS 45. 7% year-over-year, compared to -15. 8% for Franklin Electric Co. , Inc.. Over a 3-year CAGR, XYL leads at 17. 8% annualised revenue growth. Higher growth typically commands a higher valuation multiple — check whether the premium P/E or P/S is justified by the growth rate using the PEG ratio.

Energy Recovery, Inc.

(ERII) is the more profitable company, earning 17. 0% net margin versus -51. 7% for LiqTech International, Inc. — meaning it keeps 17. 0% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: ERII leads at 18. 2% versus -50. 3% for LIQT. At the gross margin level — before operating expenses — ERII leads at 65. 2%, reflecting greater pricing power or product mix advantage. Stronger margins indicate durable pricing power, lower cost of revenue, or higher mix of software/services. They are one of the clearest signs of business quality.

The PEG ratio (forward P/E divided by expected earnings growth rate) is the most precise measure of undervaluation relative to growth potential.

By this metric, Zurn Elkay Water Solutions Corporation (ZWS) is the more undervalued stock at a PEG of 0. 91x versus Franklin Electric Co. , Inc. 's 2. 50x. A PEG below 1. 0 is traditionally considered the threshold for growth-adjusted undervaluation. On forward earnings alone, Xylem Inc. (XYL) trades at 20. 9x forward P/E versus 29. 0x for Zurn Elkay Water Solutions Corporation — 8. 1x cheaper on a one-year earnings basis. Analyst consensus price targets imply the most upside for ERII: 37. 9% to $13. 00.

In this comparison, XYL (1.

4% yield), FELE (1. 1% yield), ZWS (0. 7% yield) pay a dividend. LIQT, ERII do not pay a meaningful dividend and should not be held primarily for income.

For long-horizon retirement investors, Franklin Electric Co.

, Inc. (FELE) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (low volatility (β 0. 92), 1. 1% yield, +231. 4% 10Y return). Energy Recovery, Inc. (ERII) carries a higher beta of 1. 53 — meaning larger drawdowns in market downturns, which matters significantly when you cannot wait years for a recovery. Both have compounded well over 10 years (FELE: +231. 4%, ERII: -11. 9%), confirming both are viable long-term holds — but the lower-volatility option typically results in less emotional selling during corrections. Retirement portfolios generally favour predictability over maximum returns. Consult a financial advisor before making allocation decisions.

Both stocks operate in the Industrials sector, making this a peer-level intra-sector comparison — the same macro tailwinds and headwinds will affect both.

ZWS, FELE, XYL pay a dividend while LIQT, ERII do not, making them suitable for different income and tax situations. These fundamental differences mean investors should not choose between them on a single metric — the "better stock" depends entirely on which of these characteristics aligns with your investment strategy.