In Satisfactory you can have a different number of coal generators per water pipe. It depends if you using MK1 or MK2 pipes. I've calculated the correct water flow in a sinle MK1 for a specific numbers of coal geneators:  MK1 Pipe / 300m2 = 8.3 Coal Generators MK2 Pipe / 600m2 = 16.6 Coal Generators You can easily build up to 9 coal generators per water pipe. They will not reach 100% workload but on the other hand you will be able to use water drip in your pipe.