Hot water to clean leader 5/16 tubing

[Sugar Bear]

How hot can I get my water before sending it down my tubing for cleaning?

[maple flats]

100 F should be ok, I never ran any warmer than that. I think most use cold water, as do I, when I was the tanks at the sugarhouse I use a 1/2" diaphragm pump with 5/8" potable water hose hose, but then it reduces to a 1/2" ball valve and then a few feet of 5/16. I then push hot water at about 100-110 F thru (3.1 gpm), always open discharge.