Quick answer: Moen shower heads are rated by gallons per minute (GPM), which measures the maximum water volume the fixture delivers at standard test pressure. A 2.5 GPM rating, like the Verso 220C3BN, provides full flow, while Eco-Performance models run at 1.75 GPM and WaterSense units are capped at 2.0 GPM. Lower flow does not always mean weaker spray, as design matters.
Nearly every showerhead and faucet listing carries a flow figure in GPM, and many are labelled WaterSense or Eco-Performance. The labels are related but not identical.
GPM
Gallons per minute — the volume of water the fixture delivers at a standard test pressure. On our shelves, showerheads run from 1.75 GPM on Eco-Performance models up to 2.5 GPM on full-flow models such as the Verso 220C3BN. Bathroom faucets are lower, commonly 1.2 GPM.
GPM is a maximum, not a guarantee. A 2.5 GPM head fed by weak supply pressure will deliver less.
| Model | Flow Rate (GPM) | Certification |
|---|---|---|
| Verso 220C3BN | 2.5 | Full-flow |
| 3670EP handheld | 1.75 | Eco-Performance |
| WaterSense showerhead | 2.0 | WaterSense |
| Bathroom faucet | 1.2 | None |
WaterSense
WaterSense is an EPA certification, not a Moen marketing term. For showerheads it caps flow at 2.0 GPM, and certified products must also pass spray-force and coverage tests — the point being that a fixture cannot earn the label simply by restricting water until the shower is unpleasant.
Some US states and municipalities require WaterSense-rated fixtures in new work. If you are renovating under permit, check local requirements before ordering.
Eco-Performance
Moen's own designation for its reduced-flow models, typically 1.75 GPM on showerheads. Eco-Performance parts often carry EP in the model number — the 3670EP handheld and the T2157EP trim series are examples.
Does lower flow mean a worse shower?
Not necessarily, and the reason is spray design rather than volume. A smaller spray face concentrates the same water into a firmer stream; a wider rainshower face spreads it, which feels gentler at any flow rate. A well-designed 1.75 GPM head with a focused spray can feel stronger than a poorly designed 2.5 GPM rainshower.
Where flow rate matters most is in tub filling — a low-flow tub spout takes noticeably longer — and in multi-outlet systems running more than one head at once.
Practical guidance
- Low supply pressure: favour concentrated spray faces over wide rainshower heads.
- Renovating under permit: check whether WaterSense is mandatory locally.
- Multiple outlets: total demand is what matters, so lower per-head flow helps.
- Filling a tub often: flow rate directly determines wait time.
Flow rate and certification are listed on every product page. Browse shower heads and handheld showers.
An example in stock: the Moen 220C3BL Verso Combination Shower Head Matte Black Magnetix Handheld.
Related reading
- Moen MotionSense Low Flow: What to Check
- Faucet Aerator vs Flow Restrictor: What Controls the Flow?
- Moen Shower Head Flow Restrictor: Pressure, Cleaning and Replacement
Written by John Plumber, an experienced plumber who shares his personal opinion and hands-on experience.
This article reflects personal experience, not step-by-step instructions. Always follow the manufacturer's installation guide for your exact model, and hire a licensed plumber if you are not sure. Questions or corrections: support@aqualux.studio.
