Exposed drain lines in an attic are often a trip hazard and can easily become damaged. To reduce this risk and prevent an accident build a bridge to cover the drain lines. To make the bridge, attach 2X4’s to a length of 1/2′ plywood. Once assembled, lay the wood piece over the drain lines to create a step. Be careful not to pinch the lines. Place a screw on each end to hold it in place. As an added safety measure consider painting the edge of the step or marking the edge with colored tape.
Can you blow the A C drain out? I do not have access to and out side drain only the interior one. thanks debbie