What Not to Flush

The short answer on what not to flush: anything that is not human waste or toilet paper. Toilet paper is made to fall apart in water within moments. Almost everything else that ends up in a bowl, wipes included, holds together long enough to snag somewhere between the toilet and the street, and that is where repeat blockages start.

Why toilet paper is the only paper that belongs

A drain line is not a smooth, straight tube. It has bends, joints, a slight slope and, in an older house, a rough inside surface. Toilet paper breaks into small fibres almost as soon as it is wet, so it rides the water through all of that. Paper towels, tissues and wipes are made to stay strong when wet. That strength is the whole point of them, and it is exactly what makes them a problem in a pipe.

A single item rarely blocks a line on its own. The trouble is that one item catches on a joint or a rough patch, the next one catches on the first, and over weeks a mat builds up that holds back paper and waste. The toilet flushes slowly for a while, then one day it does not flush at all.

The wipes question

Wipes cause more repeat calls than anything else on this list. Baby wipes, cleaning wipes, makeup remover wipes and the ones sold as flushable all fall into the same group for a drain line.

A packet that says flushable means the wipe will go down the toilet and leave the bowl. It does not mean the wipe breaks down the way toilet paper does. Many stay in one piece for a long time, long enough to wrap around a snag in your line or reach the sewer intact. Wastewater systems deal with the same problem at a larger scale: wipes collect at pumps and screens and have to be pulled out by hand.

The simple rule is to put every wipe in a bin, whatever the packaging says. When you are not sure what not to flush, the bin is always the safe choice.

What not to flush, in one list

If you want a list to tape inside a cabinet door, this is what not to flush:

• Wipes of any kind, including those labelled flushable
• Paper towels, napkins and facial tissues
• Cotton balls, cotton swabs and makeup pads
• Dental floss, which tangles around everything else in the line
• Tampons, pads and their wrappers
• Condoms
• Diapers and diaper liners
• Cat litter, even the kind sold as flushable
• Hair from a brush or a drain
• Cooking grease, fat or oil
• Food scraps
• Medicines, which belong in a pharmacy or community take-back program rather than the water

A bin with a lid beside every toilet does more to prevent blockages than anything a plumber can do after the fact.

Grease and the kitchen side of the house

Grease is the kitchen version of the same problem. It goes down a sink as a warm liquid and sets as it cools in the line. Soap and food particles stick to it, and the layer thickens each time. Hot water and dish soap only push it a little further down the pipe before it sets again.

Wipe greasy pans with a paper towel and put the towel in the bin. Pour cooled fat into a can or jar and throw it out with the trash. Use a strainer in the kitchen sink so food scraps stay out of the line.

What these things do to an older drain line

Many older Broward County homes were built with cast iron drain lines, often running under the concrete slab. Cast iron does not stay smooth. Over time the inside corrodes and builds up scale, and the pipe’s opening narrows and roughens. A rough, narrow pipe is very good at catching wipes, floss and paper towels.

That has a few consequences:

• Clogs come back. Clearing a blockage removes the mat but not the rough surface that caught it. If the same items keep going down, the same spot keeps catching them.
• Snagged material holds water. A partial blockage means waste sits in the line longer, which can make sewer smells worse and puts more wear on joints.
• Hidden damage stays hidden. A line under a slab cannot be seen. A slow toilet or a gurgling tub may be the only sign that the pipe has cracked, sagged or scaled up badly.
• Roots find weak joints. Where an older line has a cracked joint, roots can grow in. Wipes and paper then wrap around the roots and the blockage gets worse quickly.

Homes on a septic system have their own reason to be strict. Wipes and other items that do not break down sit in the tank, take up space and can be carried towards the drain field.

Signs a blockage is building

You often get some warning before a toilet backs up. Watch for:

1. A toilet that needs a second flush more often than it used to.
2. Water that rises high in the bowl before it drains away.
3. Gurgling from a tub or shower drain when the toilet is flushed.
4. More than one fixture draining slowly at the same time, which points at the main line rather than a single drain.
5. A sewer smell that comes and goes.

One slow fixture is usually a local problem. Several slow fixtures together, or water coming up in a tub when you flush, suggests a blockage further down the line, and that is the point to stop using the plumbing and get help.

What a pro can find

A licensed plumber can clear a stubborn blockage with the right equipment and tell you what caused it. When a line keeps blocking, the pro may run a camera through it to see the inside of the pipe: scale, a sagging section, a cracked joint or roots. On a line that needs more than a snake, the pro may suggest hydro jetting, which uses water under pressure to scour the inside of the pipe. The pro decides when each of those is the right tool, and explains why before the work starts.

A camera inspection is also the honest answer to whether you are dealing with a habit or a pipe problem. If the line is sound, keeping wipes and grease out of it may be all it needs. If it is badly scaled or damaged, you know what you are dealing with before the next backup.

Keeping the line clear

Knowing what not to flush is most of the job. Keep a bin by every toilet, keep grease out of the sink, and treat a slow drain as an early warning. If a line keeps blocking anyway, One Call Home Pros matches you with a vetted, licensed, insured local plumber who works on drain lines every day. You pay One Call, and One Call pays the pro, so ask what the price covers before the work starts.