Don’t worry, you’ll still have access to your sewage drain. Simply place the AirSkirts tube under the drain area and inflate – the tube will inflate to conform around the irregular areas. Our buffer pillows can fill in any gaps. Because the skirts are modular, you can place them so the ends of the tubes meet at any odd protrusions. You can also consult with one of our engineers after placing your order to discuss any concerns. Kits can be modified at no charge to accommodate any problematic pipes or stabilizer jacks.