Terminals 1 and 3 are NOT connected airside. If your connection is between them, you'll have to re-clear security to switch.
3 enclosed indoor post-security relief areas (B/C connector, D Gates, E Gates) plus 3 outdoor pre-security pet potties. Indoor areas have synthetic grass, fire hydrants, sinks.
Indoor enclosed room with fire hydrant and sink.
Indoor enclosed, ADA-compliant. Reach via tram from T1.
Indoor enclosed. International concourse.
Fenced outdoor with waste bag dispensers.
Fenced outdoor.
Fenced outdoor.
On connector bridge between B and C gates, near Gate C25 · Indoor enclosed room with fire hydrant and sink.
T1 Ground Transportation 1 · T1 Ground Transportation 2 · T3 South end outdoor
Given this airport's policy, use the pre-security area or relieve at home/hotel before arrival.