Bay Area Consumers’ Checkbook and Checkbook.org surveyed customers and evaluated 141 plumbing firms. Plenty of plumbing outfits were rated “superior” overall by at least 90 percent of their surveyed customers. [...] other companies received such favorable ratings from fewer than half of their surveyed customers. To supply and install a Toto Drake II toilet (Model CST454CEFG), prices ranged from $440 to $1,350, with an average price of $704. The price to supply and install an InsinkErator Premier Badger 5 garbage disposal ranged from $200 to $600, with an average price of $314. The price to supply and install a Bradford White water heater (Model M4 5036) ranged from $1,000 to $2,600, with an average cost of $1,531. Specify in advance exactly what you want done — makes and model numbers of all fixtures and appliances; what kind of pipe will be used; exactly where fixtures are to be located; and who is responsible for cutting holes in the wall and repairing afterward, carpentry, hauling debris, etc. The Chronicle is partnering with Bay Area Consumers’ Checkbook magazine and Checkbook.org, a nonprofit consumer group that rates various types of local service companies and professionals, to help you find the best services in the Bay Area. Chronicle readers can read Checkbook’s full article with advice on selecting and dealing with plumbers, and, through Feb.