def queryHistory(timeHours):
	from java.util import Date
	
	end = Date()
	start = Date(end.getTime() - long(timeHours * 3600000))
	
	return system.tag.queryTagHistory(
		paths=["[CoreDB/ignition-ignition:default]watermeter/prefilterflowrate"],
		startDate=start,
		endDate=end,
		returnSize=120,
		aggregationMode="Average",
		returnFormat="Wide"
	)