Note to readers: This post was updated on July 24, 2026 to reflect current seasonal maintenance guidance for San Gabriel Valley homes and add links to our related how-to guides. We refreshed the details below so the advice reflects how we approach this work today.
Nobody likes a surprise plumbing emergency. The good news is that most of the seasonal problems that send homeowners scrambling — slow drains, leaking pipes, low water pressure, gas line issues after an earthquake — give warning signs first. A little seasonal maintenance goes a long way toward avoiding an expensive emergency call.
Here’s what to check as the weather warms up and what each of these problems tends to mean.
Slow and Clogged Drains
Grease, hair, soap scum, and mineral buildup accumulate in drain lines over time, and slow drains are usually the first sign. If more than one drain in the house is slow at the same time, that often points to a clog further down the line rather than a single fixture problem. Avoid liquid drain cleaning chemicals — they can damage older pipes without clearing the actual blockage. A proper drain snake or professional hydrojetting service clears the line without the corrosion risk.
Sewer Line Problems
Tree roots, aging clay pipe, and years of grease buildup are the most common causes of sewer backups in older San Gabriel Valley homes. Recurring backups, gurgling drains, or slow drainage throughout the house are signs it’s time for a sewer line inspection. Catching root intrusion early with routine cleaning is far cheaper than dealing with a full backup or a collapsed line later. For homes with a history of problems, routine hydrojetting keeps lines clear between inspections.
Leaking Pipes and Low Water Pressure
A sudden drop in water pressure, unexplained wet spots on the floor or wall, or a spike in your water bill can all point to a hidden leak. Slab leaks in particular are easy to miss until they’ve caused real damage — watch for warm spots on the floor or the sound of running water when everything is off. Learn the warning signs of a slab leak so you can catch it early.
Gutter and Drainage Checks
Spring rain exposes clogged gutters and poor yard drainage fast. Water that pools near the foundation instead of draining away can eventually find its way into crawl spaces or slab cracks. Clearing debris from gutters and downspouts each spring is a simple habit that prevents a much bigger water intrusion problem later.
Earthquake Gas Safety
Southern California’s seismic activity means gas line safety deserves a spot on every seasonal checklist. An automatic earthquake shut-off valve cuts gas flow automatically if the ground shakes hard enough to trigger it, which prevents the fires that are often more dangerous than the earthquake itself. If you’re not sure whether your home has one, it’s worth checking.
Water Heater Health
Sediment builds up in tank water heaters over time, reducing efficiency and shortening the unit’s life. If your water heater is more than 8-10 years old, making noise, or not heating like it used to, take a look at the signs it needs replacing before it fails on you. Many homeowners switching this spring are also comparing tankless water heater installation for the efficiency gains.
When to Call a Plumber
Most of these checks take just a few minutes, but if you notice multiple slow drains, a spike in your water bill, or you’re simply not sure what you’re looking at, it’s worth having a professional take a look before small issues become expensive ones. Western Rooter has served the San Gabriel Valley for decades and we’re happy to do a seasonal check on request.
Need help getting ahead of a plumbing issue this season? Schedule a drain cleaning or give us a call — we’re a 24-hour emergency plumbing company, but we’d much rather help you prevent the emergency in the first place.
