This estimate is to replace approximately 30 ft on cast iron located in a crawlspace that you cannot walk in. HVAC unit is laying on top of a section of piping causing limited access to piping needing to be replaced. Have found 3 total spots where cast iron is leaking. Will need to replace cast iron at first leak near hvac system all the way to the foundation wall. Replace section of cast iron pipe tested everything is good job is complete