noun
common faucet; shared water tap
Refers to a water tap shared by multiple households or residents, often in older apartment buildings or communal living areas.
このアパートには共同水栓があるので、水道代は家賃に含まれています。
This apartment has a common faucet, so the water bill is included in the rent.
Compound of 共同 (shared, common) and 水栓 (water tap, faucet).