You can see your water pump on the top left of page 7 of the Body, 12 Volt Wiring Diagram
for your coach. The water pump switch connector is on the bottom center of the same page.
Per the Wiring Identification Guide
coming of that switch connector (JA / 14 YEL OVERCURRENT PROTECTION (15A FUSE/BREAKER TYPICAL) --> WATER PUMP,MONITOR PANEL,ETC ("CLEAN CIRCUIT",REF JP)) is the source of power for the pump. Page 4 of the same diagram shows wire JA
connecting to a 15A circuit breaker.
Page 5 of the Body, 12 Volt Wiring Installation
for your coach shows that that circuit breaker is labelled 'Monitor/TV' (just as skigramp said).