GEORGE MUNSEY
George: Look for a probable negative air pressure situation inside the building(s) affected. Insufficient make up air in the heating or A/C system can cause sewer gas to be drawn from any and every opening in the drainage and venting system. Old floor drains that no longer have a protecting water seal, or toilets that have poor seals at the flange all need to be carefully checked. Abandoned piping that has not been properly capped off could be the problem???? Lots of luck with your search…Bud.
