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I came across thread194-1415 and I work for a manufacturer of CIPP and was wondering how you came out with your PVC pipe repair? I was just going to let you know that if another problem like this arises and no one wants to help you out, go to www.daystarcomposites.com and let us see if we can help.

You are right and that's what I used to figure out the head pressure before we used the down tube with the nozzle, but there is something that I left out in my initial question. See we use head pressure to invert a liner in an existing host pipe underground. Basically its like taking your sock...

Your right, but once flow begins I have no way to determine my flow rate or velocity because the liner is hand fed into the down tube. The only information I have is the static pressure and geometry of the nozzle. Do I solve the down tube in separate pieces? Find the flow rate for the 15"...

I appreciate yall responding to my question. Initially, I was under the same understanding as you RWF7437, that the size, shape and material have nothing to do with the pressure except for the height but our results out in the field make me believe that it does have a slight affect on head...

This may be a dumb question, but I can't seem to find anything to help me determine an answer so I thought I'd see if maybe someone might could point me in the right direction. In my industry, we use a column of water in a down tube(open to the atmosphere) to achieve various head pressures...

This may be a dumb question, but I can't seem to find anything to help me determine an answer so I thought I'd see if maybe someone might could point me in the right direction. In my industry, we use a column of water in a down tube(open to the atmosphere) to achieve various head pressures...