noun, noun or participle which takes 'suru'
filling a bathtub; preparing a bath; running a bath
Refers to the act of filling a bathtub with hot water, often as part of daily bathing routines. Commonly used with する to describe the action.
お風呂の湯張りをしてから、ゆっくり入った。
After filling the bathtub, I took a relaxing soak.
自動湯張り機能
I bought a water heater with an automatic bath-filling function.