The best replacement for water pump is thermostat.

The best alternatives to water pump are rated as following:
★★★★★  thermostat
★★★  head gasket
★★  radiator
★★  long water pump
★★  short water pump
★★  commodore
★★  air pump
★  radiator leak
★  thermostat overheating
★  heater core
★  short
★  trash pump
★  oil pump
★  coolant pump
  electric water pump
  mechanical pump
  long
  hose leak
  gasket
  mechanical water pump
  clogged radiator
  powerhead
  standard water pump
  sand pump
  standard volume water pump
  fan clutch

Your alternative for water pump is not listed? Suggest!
Speaking about water pump, one probably shouldn't forget about pressure tank.

Other search terms related to water pump and their ratings are:
★★★★★ pressure tank
diesel engine
You have in mind a companion for water pump and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of water pump in all years. Click on graph for more.
water pump
thermostat
head gasket