American Standard 0.5 gpm/1.9 L/min Pressure-Compensating Non-Aerated Spray - AMS-M922901

It's a 0.5 gpm (1.9 L/min) spray, so it meets specs written to a 0.5 gpm maximum. That's about a third of the 1.5 gpm flow common on standard water-saving showerheads, so expect a noticeably leaner spray. It's the rate facilities and hospitality operators pick when they are cutting hot water load across a lot of rooms.

Yes. A showerhead swap is a shower arm change only, so the mixing valve, escutcheon and handle stay as they are. Standard shower arms in North America are 1/2 inch NPT threaded, which is what showerheads thread onto. Carry the arm finish over when you pick chrome, brushed nickel, or oil rubbed bronze so the head and arm still match.

Pressure compensating means the M922901 holds its 0.5 gpm output as supply pressure swings, instead of surging on a high-pressure riser and dribbling when other fixtures draw. On a multi-family or dorm stack where pressure varies floor to floor, that keeps the spray consistent from room to room.

The M922901 is a non-aerated spray. Non-aerated streams don't mix air into the water, so the droplets stay warmer as they travel, which is why they're often chosen at very low flow rates where an aerated pattern can feel cool. If you want the softer, air-mixed feel instead, you need an aerated spray head rather than this one.

Three finishes: chrome (M922901-0020A), brushed nickel (M922901-2950A), and oil rubbed bronze (M922901-2240A). Chrome and brushed nickel are the two that usually match existing commercial and multi-family shower valve trim; oil rubbed bronze is the darker residential and hospitality look.

Dropping to 0.5 gpm reduces hot water demand per shower, so it never overloads an existing heater, and it does not change any drain or supply piping. The one thing to watch is tankless heaters: many need a minimum flow to fire, and a 0.5 gpm head alone may sit under that threshold. On tank heaters and conventional central plant systems there's no issue.

For guest-facing showers, 0.5 gpm is aggressive. It's the flow rate typically specified for water-restricted facilities, correctional, institutional, and deep conservation retrofits. Hospitality and market-rate apartments more often land at 1.5 to 1.8 gpm to avoid complaints. If your project is chasing a water-use target, the M922901 delivers it; if guest comfort is the priority, spec a higher-flow head.

Brushed nickel is M922901-2950A. Chrome is M922901-0020A and oil rubbed bronze is M922901-2240A. The base model number M922901 is the same across all three, only the finish suffix changes, so order by the full number to avoid getting the wrong finish on a multi-unit order.