Arnold's sewers are run by the water company
Arnold sold its sewer system to Missouri American Water after voters approved the sale in November 2014. The company maintains the public mains. The lateral from your house to the main is still yours to keep clear and to repair.
That matters when sewage is coming up the floor drain. If the neighbors are backing up too, call Missouri American Water before you pay anyone to cable your line, because the blockage may be in their main. The company's customer line is 1-866-430-0820, and it takes emergency calls around the clock.
What fails in a house this age
Arnold had about 19,000 residents by 1980 and has stayed close to that number since, so most of the town's houses were already standing by then. Their drain lines have had forty years or more of grease, soap and scale.
- Cast iron under the basement floor is often past its service life. It scales up inside, catches paper and wipes, and eventually cracks.
- Where the line outside is clay, roots get in at the joints.
- Where the line has settled and holds water, wipes and tampons collect in the low spot.
The first visit is usually a cable through the cleanout to get the house draining again. If there is no cleanout, the line is reached through a stack access inside the house, or by pulling a toilet.
When the same line clogs twice
Have a camera run through it. With cast iron, the usual order is to descale and flush the pipe, look at it on camera, and then choose between lining it and digging it up. Price the lining first if the basement is finished, since the floor stays in place.
No lateral program in Arnold
Many St. Louis County cities help pay for a broken sewer lateral. Arnold doesn't have a program like that, so the whole repair is the owner's cost. It is a big one. Replacing a lateral means digging up the yard, and sometimes a driveway, a sidewalk or the basement floor, and it usually arrives as an emergency.
That makes prevention worth more here than in most towns. Have the line cleaned on a schedule you set: a yearly cabling where roots are the problem, and regular jetting where the line is flat and collects debris. There is no maintenance plan to sign up for. You book each visit, and it is billed like any other. Scheduled cleaning keeps roots from growing large enough to crack the pipe, and it clears buildup before it turns into a backup. It also puts a tech on the line every year, so a change gets noticed while a spot repair or a liner can still fix it.
Maintenance won't make a worn-out pipe new. It does put the big repair off, and it gives you warning before it comes.
Near the Meramec
Parts of Arnold sit low along the Meramec River. A backup that only shows up when the river is high is a different problem from a clog, and cabling the line won't cure it. The usual fix is a backwater valve on the lateral, which lets sewage out and stops it from coming back in. Mention the timing when you call.
Compare sewer lateral programs across 29 St. Louis-area cities