5 Common Plumbing Problems in Older LA Homes

If you own a home in Sherman Oaks, Encino, Studio City, or anywhere else across the San Fernando Valley, chances are your house was built sometime between the 1950s and 1970s. These mid-century homes have character, mature landscaping, and established neighborhoods, but they also come with plumbing systems that are now 50 to 70 years old. That means certain plumbing problems show up again and again.

The good news is that most common plumbing issues are straightforward to fix and do not require a full-service plumber. A skilled handyman can handle the majority of these repairs in under an hour, saving you the cost of a plumber's diagnostic fee and minimum service charge. Here are the five plumbing problems we see most often in older LA homes, and what you can do about each one.

1. Dripping Faucets

What Causes It

A dripping faucet is almost always caused by worn internal components. In compression faucets, common in older homes, the rubber washer at the base of the stem hardens and cracks over time, losing its ability to create a watertight seal. In single-handle faucets from brands like Moen, Delta, and Kohler, the cartridge or O-rings inside the handle assembly degrade with use. Los Angeles hard water accelerates this wear by depositing calcium and mineral buildup on the sealing surfaces, which is why faucets in LA homes tend to start dripping sooner than in areas with softer water.

Warning Signs

The obvious sign is a steady drip from the spout when the faucet is fully closed. But also watch for water pooling at the base of the faucet handle, difficulty turning the handle, or a faucet that requires more force than it used to in order to shut off completely. These are signs that the internal components are wearing out even if the drip has not started yet.

Can You DIY It?

Replacing a washer or O-ring is technically simple, but it requires knowing your faucet type, having the right replacement parts, and being comfortable shutting off the water supply and disassembling the handle. If you have done it before, go for it. If not, an incorrect reassembly can make the leak worse or damage the valve seat.

When to Call a Pro

Call a professional if the drip persists after you have replaced the washer, if the valve seat is corroded, or if you are not sure what type of faucet you have. Also call if the faucet is old enough that replacement makes more sense than repair. GoldKey carries common replacement parts for Moen, Delta, and Kohler faucets, so most faucet repairs are completed in a single visit without a separate trip to the hardware store.

GoldKey's Approach

We diagnose the faucet type, determine whether a repair or replacement is more cost-effective, and fix it on the spot. A standard faucet repair takes 30 to 45 minutes. If the faucet is beyond repair, we can install a new one you have purchased or recommend a reliable model in your budget.

2. Running Toilets

What Causes It

A running toilet is one of the most common and most wasteful plumbing problems in any home. The three most frequent causes are a worn flapper valve, a faulty fill valve, and an improperly adjusted float. The flapper is a rubber seal at the bottom of the tank that lifts when you flush and drops back down to seal the tank. Over time, the rubber warps, cracks, or develops mineral buildup from LA hard water, allowing water to leak continuously from the tank into the bowl. The fill valve controls how much water enters the tank after a flush, and when it malfunctions, the tank either overfills and runs into the overflow tube or never stops running. Float adjustment issues cause the water level to sit too high, sending a constant trickle into the overflow.

Warning Signs

You will hear the toilet refilling when nobody has flushed, sometimes described as "phantom flushing." You might also notice the toilet running for an unusually long time after a flush, or hear a faint hissing sound from the tank. A running toilet can waste over 200 gallons of water per day, which adds up to a noticeably higher water bill in a single billing cycle.

Can You DIY It?

Replacing a flapper valve is one of the simplest plumbing repairs and a good first DIY attempt. Flappers are universal, cost under ten dollars, and install in about five minutes with no tools. Fill valve replacement is slightly more involved but still manageable if you are comfortable with basic plumbing. Float adjustment usually requires nothing more than turning a screw or bending a rod.

When to Call a Pro

If you have replaced the flapper and the toilet still runs, the flush valve seat may be corroded and need replacement, which is a more involved repair. Also call a professional if the toilet rocks on its base, which can indicate a failing wax ring seal that could lead to water damage to your subfloor.

GoldKey's Approach

We diagnose the specific cause, replace the flapper, fill valve, or both as needed, and adjust the float for optimal water level. Most toilet repairs take 20 to 40 minutes. We also check the wax ring seal and supply line while we are there, since these components often need attention in older homes at the same time.

3. Slow Drains

What Causes It

Slow drains in older LA homes typically fall into two categories: surface-level clogs and deeper pipe issues. Surface clogs are caused by the usual suspects: hair, soap scum, toothpaste, and grease buildup in the P-trap and the first few feet of drain pipe. In bathrooms, hair wrapped around the drain stopper mechanism is the most common culprit. In kitchens, grease and food particles coat the inside of the pipe over time, gradually narrowing the opening.

Deeper issues are more concerning. Homes built in the 1950s and 1960s in neighborhoods like Sherman Oaks, Encino, and Studio City often have cast iron drain pipes that corrode from the inside out over decades. This corrosion creates a rough interior surface that catches debris and accelerates clog formation. Tree root intrusion into underground drain lines is another common issue in LA, where large, mature trees send roots seeking moisture into pipe joints.

Warning Signs

Water pooling around your feet in the shower, a bathroom sink that takes more than 30 seconds to empty, or gurgling sounds from drains when water is running elsewhere in the house. Multiple slow drains occurring at the same time usually indicate a mainline issue rather than individual clogs.

Can You DIY It?

For surface-level clogs, yes. Remove the drain stopper and pull out any hair or debris. A plastic drain snake tool, available for a few dollars at any hardware store, can clear most bathroom drain clogs in minutes. For kitchen drains, running very hot water for several minutes can help dissolve grease buildup. Avoid chemical drain cleaners, which can damage older pipes and are harmful to the environment.

When to Call a Pro

Call a professional if a plunger and basic snaking do not clear the clog, if multiple drains are slow simultaneously, if you notice sewage odors, or if water backs up into other fixtures when you run a drain. These are signs of a deeper blockage or pipe damage that requires professional equipment.

GoldKey's Approach

We clear surface-level drain clogs using manual tools, not chemicals. We inspect the drain stopper mechanism, clean the P-trap, and snake the line if needed. For deeper issues that suggest mainline problems or pipe damage, we will be upfront about it and recommend a licensed plumber with camera inspection capability. We do not upsell services we cannot properly deliver.

4. Low Water Pressure

What Causes It

Low water pressure is one of the most frustrating plumbing problems in older LA homes, and it has several possible causes. The most common in our service area is mineral buildup inside galvanized steel pipes. Homes built before the 1970s in Sherman Oaks, Encino, Tarzana, and Studio City were typically plumbed with galvanized steel, which corrodes from the inside over decades. As the interior diameter of these pipes narrows due to rust and mineral deposits, water flow decreases progressively throughout the home.

A simpler and more easily fixable cause is clogged faucet aerators. The small screen at the tip of every faucet catches mineral particles and debris from the water supply. In areas with hard water like Los Angeles, aerators can become partially or fully blocked within a year or two, dramatically reducing flow from that specific fixture.

Other causes include a partially closed main shut-off valve, a failing pressure regulator, or a leak somewhere in the supply line that is diverting water before it reaches your fixtures.

Warning Signs

Weak shower spray, faucets that produce a thin stream, sprinklers that barely reach their target area, or a washing machine that takes noticeably longer to fill than it used to. If the low pressure is only at one fixture, it is likely an aerator or supply line issue. If it affects the whole house, the problem is upstream.

Can You DIY It?

Aerator cleaning is an easy DIY job. Unscrew the aerator from the faucet tip, soak it in white vinegar for an hour, scrub the screen with an old toothbrush, and reinstall. This alone restores full flow in many cases. Checking the main shut-off valve is also simple: make sure it is fully open, as these valves sometimes get bumped partially closed during other work.

When to Call a Pro

If cleaning aerators and checking the shut-off valve does not solve the problem, you likely have corroded pipes, a failing pressure regulator, or a hidden leak. A handyman can replace individual supply lines and clean or replace aerators throughout the home. For whole-house re-piping, which is the ultimate solution for severely corroded galvanized pipes, you will need a licensed plumber.

GoldKey's Approach

We start with the simplest fixes first: clean or replace all aerators, check supply line valves, and inspect visible pipes for signs of corrosion. We can replace individual shut-off valves and supply lines, install new showerheads with better pressure performance, and assess whether the issue is localized or system-wide. If re-piping is needed, we provide an honest assessment and can refer you to a trusted plumber. Learn more about our plumbing repair services.

5. Garbage Disposal Problems

What Causes It

Garbage disposals have a lifespan of about 10 to 15 years, which means many disposals in older LA homes are either on their last legs or have already been replaced at least once. The most common problems are jams, overheating, and leaks. Jams happen when hard objects like bones, fruit pits, or silverware get lodged between the grinding plate and the impellers. Overheating occurs when the motor is overworked by fibrous foods like celery, corn husks, or artichoke leaves, which wrap around the grinding mechanism. Leaks typically develop at the sink flange, the dishwasher connection, or the discharge pipe connection as gaskets and seals age.

Warning Signs

The disposal hums but does not grind, meaning the motor runs but the grinding plate is stuck. The disposal does not turn on at all, which could be a tripped reset button, a tripped circuit breaker, or a burned-out motor. Water leaks under the sink when the disposal runs. A persistent bad odor that does not go away with cleaning, which can indicate food trapped in areas you cannot reach.

Can You DIY It?

Two easy fixes to try first. If the disposal hums but does not grind, turn it off, insert an Allen wrench into the hex socket on the bottom of the unit, and rotate it back and forth to free the jam. If the disposal does not turn on at all, press the red reset button on the bottom of the unit and check the circuit breaker. These two steps resolve about half of all garbage disposal complaints.

When to Call a Pro

If the reset button and Allen wrench trick do not work, if the unit is leaking, or if it is more than 12 years old and making grinding or rattling noises, it is time for a replacement. A handyman can swap a garbage disposal in about an hour, which is significantly less expensive than calling a plumber for the same job.

GoldKey's Approach

We diagnose the problem, attempt a repair if the unit is worth saving, and install a replacement if it is not. We work with all major brands including InSinkErator and Waste King and can install a unit you have purchased or supply one at cost. A garbage disposal replacement typically takes 45 to 60 minutes. We also check the dishwasher drain connection and tighten the sink flange while we are there to prevent future leaks.

Why Older LA Homes Need Extra Attention

The San Fernando Valley experienced a massive building boom from the late 1940s through the 1970s. Neighborhoods like Sherman Oaks, Encino, Studio City, Tarzana, and North Hollywood were developed with similar construction methods and materials, which means they share similar aging patterns. Galvanized steel supply pipes, cast iron drain lines, and copper connections were standard for the era. While these materials were durable, they were not designed to last forever.

Add in the hard water that is typical of the Los Angeles municipal supply, seasonal temperature swings that stress pipe joints, and decades of use, and you have a recipe for the plumbing issues described above. The good news is that most of these problems are fixable without major renovation, and addressing them early prevents expensive water damage and emergency repairs down the road.

If you are preparing your home for sale, addressing plumbing issues beforehand is especially important. Buyers and home inspectors will flag running toilets, dripping faucets, and low water pressure, and these items give buyers leverage to negotiate your price down.

Frequently Asked Questions