Angi
“Just in time. Affordable and reliable company!!! Thank you Josh.”
Vladimir G.
Shrewsbury · Water Heater - Install or Replace
Problem Guide
24/7 Emergency Availability
Sewer Backing Up? Stop Using Water and Call for Service
A main-line blockage can cause sewage or wastewater to return through floor drains, tubs, showers or lower-level fixtures. Professional cleaning and diagnosis may be required.
What This Problem Can Mean
A sewer backup is more than a slow drain. When the building drain or sewer line cannot carry wastewater away, continued water use can make the backup worse and increase property damage.
Warning Signs
Multiple fixtures are draining slowly at the same time
Water backs up through a floor drain
Toilet flushing causes another drain to overflow
Sewage odor is strong near drains
Lower-level tub or shower fills when water is used elsewhere
Backup returns after previous drain cleaning
Possible Causes
Main-line blockage
Grease, wipes or debris buildup
Root intrusion
Damaged or offset sewer piping
Collapsed or deteriorated line
Heavy blockage requiring mechanical cleaning or jetting
What To Do Now
Stop unnecessary water use in the building
Keep people away from contaminated wastewater
Call for drain or sewer service
Document where and when the backup is occurring
What Not To Do
Do not keep flushing toilets to test the line
Do not mix chemical drain cleaners
Do not enter contaminated areas without proper precautions
Do not assume repeated backups are solved without diagnosing the line
How Tandem Mechanical Can Help
Depending on the condition, Tandem Mechanical may use drain-cleaning equipment, sewer-camera inspection, hydro jetting or other appropriate service to clear and evaluate the line.
Residential Properties
Residential backups can affect basements, laundry areas, bathrooms, kitchens and main building drains in single-family and multi-family properties.
Commercial Properties
Commercial sewer backups can interrupt restaurants, apartments, retail, facilities and other properties where drainage must remain operational.
Sewer Backup FAQs
Real Customer Reviews
What Tandem Customers Are Saying
Angi
“Responsive, flexible and nice clean work. Listens to needs and provides professional service.”
Doug L.
Palmer · Tankless Water Heater - Install
Angi
“Joshua, the owner, explained the best options for my plumbing needs, and gave me the estimate when he said he would. The repairs were completed on time & the estimate was the actual bill. We now have a working ice maker and no more floods in our basement!”
Randy S.
Google
“Sam from Tandem Plumbing responded promptly to fix an issue with my toilet, and the entire job was handled with great professionalism. He has a reassuring and approachable manner that made the experience stress-free. I was also pleasantly surprised by how fair and reasonable the pricing was. I only wish I’d called sooner!!!”
Amy Lynn
Westfield · Plumbing
Angi
“Prompt, professional, quality work. Highly recommended”
TJ S.
Angi
“Excellent job friendly workers. Very well done. Everything was cleaned up. Would highly recommend them.”
Mary C.
Angi
“Just in time. Affordable and reliable company!!! Thank you Josh.”
Vladimir G.
Shrewsbury · Water Heater - Install or Replace
Angi
“Responsive, flexible and nice clean work. Listens to needs and provides professional service.”
Doug L.
Palmer · Tankless Water Heater - Install
Angi
“Joshua, the owner, explained the best options for my plumbing needs, and gave me the estimate when he said he would. The repairs were completed on time & the estimate was the actual bill. We now have a working ice maker and no more floods in our basement!”
Randy S.
Need Help With Sewer Backup?
Call Tandem Mechanical or book service online. Availability varies by service area, technician capacity and urgency.