American Standard Flow Regulator 0.5 Gpm - AMS-M923187

It's a 0.5 gpm flow regulator, so it limits the faucet outlet to half a gallon per minute. That's the low-flow rate commonly specified for public lavatory faucets in schools, offices, and healthcare washrooms where water use is being cut down.

That's exactly what this part is for. Swapping in the American Standard 0.5 gpm regulator changes the outlet restriction on the faucet rather than the faucet itself, so a facility standardizing lavatories at 0.5 gpm can do it one insert at a time. Confirm the regulator housing in your existing American Standard spout accepts the M923187-0070A insert before buying in quantity.

It's a faucet part. The 0.5 gpm regulator goes in the faucet outlet to hold the discharge at half a gallon per minute, replacing the higher-flow regulator or aerator insert that came in the spout.

Order it as American Standard M923187-0070A. That is the manufacturer part number for the 0.5 gpm faucet flow regulator, and it ships as a plain unfinished insert since the piece sits inside the spout and isn't visible.

Not quite. A flow regulator like the American Standard 0.5 gpm insert exists to cap volume, holding flow steady as supply pressure varies. An aerator's job is to mix air into the stream and shape it. Some faucet outlets carry both functions in one cartridge; if you're chasing a water-use number, the regulator is the piece that sets it, and this one sets it at 0.5 gpm.