New construction sewer clogs
My house was built in 2007. Location is NYC. Over the past 5 years I've had clogs on the main trap due to oil. I tried very hard cleaning the oil off my greasy plates with tissue before washing them with detergent. My question is this common with you folks as well? Now I make the effort to clean it out every year before it becomes a problem. It is white gunk everytime I reach into the main sewer trap.
In addition, in front of the house is a big birch tree which seems to be 2 feet away from where the sewer line is. The survey on the house shows the two 4 inch cast iron pipes (one for rain water, one for human waste) running parallel and combines into a 6 inch XHCI piping ( I assume this means cast iron too) to the main sewer line. Question is even though the sewer lines are new, should i still have it cleaned out all the way to the main sewer yearly as a prevention against roots growing in it and causing clogs?
Thanks for the attention.