Older homes have a special character and charm, but also frequently feature outdated plumbing systems. If your home is more than a few decades old, maintaining your drains not only keeps things flowing but also prevents costly repairs, backups, and structural damage. Here are some essential drain maintenance tips tailored specifically for older homes. 

1. Know What You’re Working With

Start by learning what kind of plumbing your home has. Many older homes have galvanized steel or cast iron pipes, which are more prone to corrosion and buildup compared to modern plumbing systems. Knowing your pipe material helps you determine the best maintenance approach — and when you may need to invest in a replacement. 

If you discover your home has lead pipes, you should consider replacing them as soon as possible to avoid any possible health risks. You may also need to replace plumbing if it no longer complies with current building codes. 

2. Watch for Early Warning Signs

The following signs could indicate narrowing pipes, tree root intrusion, or deteriorating pipe material:

Tree Root Intrusion — Slow drains, gurgling noises, frequent toilet backups, and sinkholes in the yard.

Narrowing Pipes — Low water pressure, frequent or slow drains, discolored water, gurgling sounds, rusty-colored water, water leaks, and water stains. 

Deteriorating Pipe Material — Discolored water, low water pressure, leaks, slow drainage, noisy pipes, mold, and visible corrosion. 

3. Avoid Chemical Drain Cleaners

Harah chemical cleaners can accelerate corrosion in old pipes, especially metal ones. Opt for safer alternatives, such as:

Baking Soda and Vinegar — This mixture clears buildup and freshens drains. 

Enzyme-Based Drain Cleaners — These naturally break down organic matter. 

Manual Methods — Plungers and soft-coated drain snakes can help you navigate old pipes and dislodge and remove blockages.

4. Use Drain Screens and Strainers

Use simple mesh strainers or drain screens in sinks, tubs, and showers to keep hair, food scraps, and other debris out of your drains — preventing buildup and clogs in older, more sensitive plumbing systems. This is especially important in older homes, where the pipes may be narrower or rougher inside. 

5. Avoid Flushing Inappropriate Items 

Don’t flush paper towels, “flushable” wipes, feminine hygiene products, medications, cotton swabs, diapers, and any plastic items, such as condoms or chewing gum. All these items can cause clogs. To avoid any issues, flush only human waste and toilet paper. 

In addition, never pour grease, fats, or oil down sink drains, as these substances will solidify and cause clogs and other issues in your plumbing system. 

If you have younger children in your home, make sure you educate them on what can and can’t go down the drain and what can and can’t be flushed down the toilet.

6. Flush Drains Regularly

Once a month, pour hot (not boiling) water down each drain to help break up soap scum, grease, oil, mineral deposits, and other residue. This simple step can improve water flow and reduce the risk of clogs in older drain lines. 

7. Check for Tree Root Intrusion

Tree roots seek out moisture and enter through cracks, which makes older clay or cast iron pipes vulnerable to infiltration. If you have large trees near your sewer line, you could have a hidden issue developing. You may need to invest in hydro-jetting or root-cutting services to keep roots at bay or line your pipes for a more permanent fix. 

8. Schedule a Professional Inspection 

A licensed plumber can perform a camera inspection to check for hidden problems, such as cracks, sagging sections (bellies), invasive tree roots, corrosion, blockages, or damaged pipes. For older homes, over 40 years old, an annual inspection can help prevent major plumbing failures and help you plan for long-term maintenance. 

9. Upgrade When Necessary

If you’re tired of dealing with frequent clogs or leaks in your home, it might be time to upgrade sections of your plumbing. Modern PVC piping is more durable and less prone to corrosion. A partial re-pipe can protect your older home’s value and livability. You may also want to upgrade toilets, sinks, bathtubs, and showers to prevent clogs from occurring and reduce strain on your plumbing system.

Keep Your Drains Working — Even if You Have an Older Home

Maintaining the drains in an older home doesn’t require an overwhelming amount of work — just consistency and care. By taking proactive steps like using mesh drain covers, avoiding harsh chemicals, and scheduling regular inspections, you can extend the life of your plumbing system and prevent costly repairs. Completing these preventative measures and maintenance will allow your home’s charm and character to be the center of attention — not frequent drain issues.