Corrugated pipe and pipe clamp (pipe hoop) for gas. The length of the bellows is from the gas interface to the vicinity of the installation position of the gas water heater.
PPR aluminum-plastic cold water pipes, hot water pipes and right-angle elbows (the number is determined according to the number of turns of pipe laying).
Three or four eight-character valves (two of which are used to connect hot and cold water pipes for gas and hot water).
Three or four metal hoses (two of which are used to connect hot and cold water pipes for gas and hot water).