Performed 2 system a/c repair and preventative maintenance. Installed 2x apco si ultraviolet lighting systems. Flushed drain lines. Cleaned outdoor units. Systems operating properly at this time. No form of water safety upstairs. Recommend installing inline PVC switch and pan float switch. Did not see surge protection. Recommend installing whole home surge protector. Outdoor units do not have hard start kit. Hardstark kits prolong the life of the compressor and quiet unit.