Good idea!
The PVC is 30 years old and very fragile. My water pressure is low, being at the end of a long line, miles form town. I agree air pressure will change things. I am thinking about 30 pounds of air or about what the water pressure is. If I go that rout I will close off both ends of the pipe and slowly bring up the pressure. From past problems, the pipe is split the long way about 1 inch. If I drop the pressure by 5 pounds the flow stops. I would increase the air pressure slowly until I get good flow. I really want the (pipe split) to make noise not split somewhere down the line.