Unscrew the aerator (the screen at the tip of the spout) and screw on a faucet-to-garden-hose adapter: one side has faucet threads (15/16"-27 male and 55/64"-27 female), the other 3/4" male hose thread for your hose.
What fits
Faucet-to-garden-hose adapter: 15/16"-27 male / 55/64"-27 female x 3/4" male hose thread
On the package: 15/16"-27M or 55/64"-27F x 3/4" GHTM
sold as a garden hose adapter for faucets (e.g. Danco 10513); it fits both standard aerator threads
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| Size | Coin size | Male aerator | Female aerator |
|---|---|---|---|
| Standard | quarter | 15/16"-27 | 55/64"-27 |
| Junior | nickel | 13/16"-27 | 3/4"-27 |
| Standard, metric | M24 x 1 | M22 x 1 | |
| Tiny Junior | penny | M20 x 1 | M19 x 1 |
| Tom Thumb | dime | M18 x 1 | M16 x 1 |
A female aerator has threads inside and screws onto a spout with threads outside; a male aerator is the reverse. The faucet-to-hose adapter fits the Standard size.
How do I know my aerator size?
Compare it with a coin: a Standard aerator is about the size of a quarter, a Junior about a nickel, a Tiny Junior about a penny, and a Tom Thumb about a dime. If the aerator has threads on the outside it's male; threads inside, female. Take it to the store with you.
The sizes on this page come from published standards and the makers’ own documents. Checked against published data from Danco, Neoperl and Delta.
General guidance from manufacturer and standards data. Parts vary by brand, so check the size printed on the package against what you measured. For gas lines or anything inside a wall, use a licensed plumber.