Your product is amazing, we have been using it for some time, I wish I had thought of it! We do a lot of tapered insulation installations which almost always requires that the vent pipes be extended to a higher elevation to accommodate the taper and this is a lot easier, less expensive and faster than
the old method of a PVC coupling which usually also required the use of a larger lead stack. The roofing consultants we have interacted with on projects that required extension of the vent stack also approved it quickly as they also see it as a way to save their clients money and still maintain a
high quality detail. Good Job!"
PSI Roofing & Restorations, President