Douglas.Curtis
Autistic Diplomat in Training
Perhaps you could find a used gasoline/diesel pump handle used at gas stations, since new ones are not cheap? Once cleaned of any residual gas/diesel it will be plenty clean enough for plants. Connect to your water line, squeeze handle and lock in place before setting it where the spout is at your desired water line. When it fills to that point it will auto shut off, just like at the gas station with your vehicle.