Only a suggestion, but if in doubt use a snap-cutter. In a well ventillated area, methane volatility is a low risk hazard with regards to old sanitary sewer pipe. if you think there might be gases present,you need to wear a proper breathing mask === === I think he meant gases inside the pipe, not in the room the pipe is in.
4" is the standard house sewer main
Cast not a problem
There are several ways but be really careful as methane and other highly flammable sewer gases can cause a violent explosion and death by asphyxiation
Rusted cast iron.
Water mains. Sewer line.
The cast of Threaded - 1999 includes: Anita Barar as Sewer Helen Forstmann as Sewer Arianthe Galani as Donna Rosa Goncalves as Sewer Joanne Larratt as Fiancee Phyllis Lim as Sewer Maria Lima as Sewer Brian Meegan as Mr Francis Fred Miragliotta as Doctor Shirley Ong as Sewer Jacquy Phillips as Bev Meme Thorne as Angela Marlene Wood as Sewer
I/you/we/they cast. He/she/it casts. The present participle is casting.
You don't ... You do melt the material inside the hub
Cut out the old section with a cast iron soil pipe cutter and install new cast iron
The cast of Possibility - 2010 includes: Miles Elliot as Pirate Kid
Yes, they can be opened for routine sewer and drain and leader cleaning
Lots of penetrating oil and / or carefully heating with a flame.
Concrete and cast Iron pipes are made of cast iron and plastic piping systems normally use plastics
The cast of The Tree of Possibility - 2011 includes: Hugh Owen as Narrator
The cast of Journey to the Russian Sewer Mountain - 2012 includes: Dakota Ashby Vidyarth Bala John Provine Rohan Udeshi
A rubber Fernco or Clamp All
By removing the old one and caulking in a new one with 1" of lead
The cast of Sewer Stench Slaughterer - 2013 includes: Jennifer Bavarskas as Chris Jason Boese as Walter Cliff Foster as Detective Richard Peoples
The cast of A Conversation of a Possibility - 2013 includes: Markus Bowie Alina Chaiderov
The cast of The Possibility of Fireflies - 2009 includes: Famke Janssen as Susanna Roma
Normally digging up the old sewer piping and removing it and installing cast iron on clean fill and giving the proper amount of pitch with accessible clean outs then using clean fill to grade
The cast of Sewer Shark - 1992 includes: Robert Costanzo as Stenchler Stevie Sterling as Girl Friday David Underwood as Ghost Frank Welker as Additional voices
Present, past & future of cast is cast - firstname.lastname@example.org _______________________________________________
The cast of The Possibility of the Impossible - 2010 includes: Vasili Tsybulka as Nick Volha Yemelyanava as Jacky
By replacing the piping using either Cast Iron of one of the non ferrous systems available