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.
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.