You are not mixing sprinklers within the system to balance hydraulics. You are using math to find the most hydraulically efficient system. I do not have a problem with it. It is a perfectly logical thing to do. I really like the difference in weld-o-let sizes. You won't put the wrong head in a system.
Nick Maneen, SET c 704.791.7789 From: Sprinklerforum [mailto:[email protected]] On Behalf Of Mike Hairfield Sent: Tuesday, June 05, 2018 9:56 AM To: Sprinkler Forum Subject: Mixing ESFR Sprinklers Is there any No No's to mix different ESFR K factors on a project. My situation is that I have 8 zones fed from the far end of a building, if I use K22's it requires 40 psi end head pressure and K16.8 uses 63 psi. The farthest two zones require some 8" feed mains, the last six zones can work with 6" feed mains using all K22 ESFR's. Now I can get the last three zones to work with K16.8 ESFR's with 6" feed mains. Using both is more economical. Mike
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