Searching for a reliable and trustworthy plumbing contractor for residential installation in Riverside, CA? Your search ends here! Hire KC’s 23 ½ Hour Plumbing and get ready to say “wow! what a plumbing service.” KC’s 23 ½ Hour Plumbing has been established for over 30 years in Riverside, CA. Our technicians are courteous, clean, trained in professional work habits, client interaction and customer service.