Arrived on site client stated their kitchen sink was clogged. Upon inspection in the crawlspace I noticed the kitchen line was not strapped at all and when opening the cleanout it was packed with grease. Advised client it was best to repipe and upgrade the pipe size to 2”. Repiped kitchen line and strapped it every 3ft and added a cleanout. When done I tested the kitchen sink and it is draining as it should.