Specs on dry hydrants call for 6". Unless your bringing in a fire truck you are not pumping directly from that. Not for the applications you are mentioning. I'm installing them wherever I can. I use 90 elbows, if you wanted to push a semi rigid suction hose down one you almost have to use 45. If you want my honest assessment, I'd keep them seperate. You can always run them in the same ditch, but I'd go with 3" and put the intake away from the dry hydrant intake. I think the answer is dry hydrants really should not be dual purpose, nor are they intended to be.
Last edited by The Pond Frog; 02/14/10 11:57 AM.
