Drain Installation & Replacement in San Pedro

Expert drain installation and replacement in San Pedro.

Not every drain problem can be cleared with a snake or a flush; sometimes it’s the pipe itself needs to go. Whether you are adding a new fixture to a bathroom remodel, or replacing a corroded drain line under a slab; Romo Plumbing handles drain installation and replacement for homes and businesses throughout San Pedro and the South Bay. We’ve serving the community with this kind of work since 1998, and our licensed plumbers know how to get a new drain in right the first time. Call (310) 831-3138 or contact us online to schedule an estimate.

Get Your Drain Done Right in San Pedro

A drain installed with the wrong pitch, an improperly vented trap, or fittings that do not match the existing pipe diameter will cause problems from day one; leading to slow draining, gurgling, and odors that no amount of clearing will fix. That’s why our plumbers take the time to assess the full drain system before recommending a replacement approach, and we pull permits when the scope of work requires them. Additionally, if your property has older clay or cast-iron drain lines, we can also evaluate whether a targeted replacement or a broader re-pipe is the right call. For properties with suspected line damage, we often recommend starting with a camera and sewer inspection so we know exactly what we are dealing with before we dig. We also offer routine drain maintenance services/”> to help maintain the longevity and efficiency of your systems. Contact us today to learn more about all of our drain installation and replacement services in San Pedro.

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What to expect

  • We begin with an inspection of the existing drain system that allows us to understand the full scope of the replacement needed.
  • We walk you through the options for materials and routing before any work begins, so there are no surprises.
  • If the installation requires opening a wall, floor, or slab, we discuss the access plan and scope with you in advance.
  • New drain lines are installed to California plumbing code, with correct fall, trap placement, and venting to prevent odors and slow drainage.
  • We test the new drain thoroughly before closing up the work area and clean up completely before we leave.

Common Drain Problems That Require Installation or Replacement

Some drain issues are a clearing job. Others mean the pipe needs to come out. Here are the three scenarios our San Pedro customers most often face when a drain replacement becomes the right answer.

Cast-iron and galvanized steel drain pipes corrode from the inside over time. Once the pipe wall has thinned or sections have begun to collapse, no amount of clearing will restore proper flow. We use camera inspection to pinpoint the damaged sections, then replace them with PVC or ABS pipe that will last decades without the same corrosion issues. For extensive damage, a phased or full-line replacement may be the most cost-effective path forward compared to repeated service calls.

Tree and shrub roots follow moisture, and underground drain lines are a common target. Once roots have colonized a section of pipe, they grow back quickly after clearing and eventually cause the pipe to crack or collapse entirely. Our team uses camera inspection to assess the extent of root intrusion and recommends the appropriate fix: for early-stage intrusion, targeted clearing and root treatment may be enough; for pipes with significant root damage, replacement is the durable solution. We can also evaluate whether sewer pipe relining is an appropriate alternative to full excavation in your situation.

Bathroom additions, kitchen expansions, ADU conversions, and laundry room installations all require new drain lines tied into the existing system. This is not a DIY job—new drains need to be sized correctly, vented properly, and connected at the right point in the drain stack to avoid pressure imbalances that cause slow drainage and odor problems throughout the home. Romo Plumbing handles new drain installations from the fixture rough-in all the way to the main line connection, and we coordinate with your contractor or project timeline to keep the remodel moving. Our plumber repair and installation team is ready to scope your project and provide a clear estimate.

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Areas We Service
  • San Pedro
  • Palos Verdes
  • Rancho Palos Verdes
  • Redondo Beach
  • Lakewood
  • Bellflower
  • Downey
  • Manhattan Beach
  • El Segundo
  • Long Beach
  • Torrance 
  • Gardena
  • Carson
  • Rolling Hills
  • Wilmington
Areas We Service
  • San Pedro
  • Palos Verdes
  • Rancho Palos Verdes
  • Redondo Beach
  • Lakewood
  • Bellflower
  • Downey
  • Manhattan Beach
  • El Segundo
  • Long Beach
  • Torrance 
  • Gardena
  • Carson
  • Rolling Hills
  • Wilmington

Romo Plumbing: Your Local Drain Installation Experts in San Pedro

When does a drain need to be replaced rather than just cleared?
A drain that backs up repeatedly despite professional clearing is telling you something: the pipe itself may be the problem. Root intrusion, collapsed sections, severe interior scale buildup, or pipe that has corroded through are all conditions where clearing provides only temporary relief. A sewer camera inspection is the definitive way to find out.

What materials do you use for replacement drain lines?
We typically install PVC or ABS pipe for drain replacements. Both materials are durable, smooth-walled to resist buildup, and will not corrode the way older cast-iron or galvanized steel lines do. We match the material and diameter to the existing system and the load requirements of the fixtures being served.

Do I need a permit for drain installation or replacement?
It depends on the scope. Most drain replacements that involve opening walls, floors, or slabs require a permit in the City of Los Angeles and surrounding jurisdictions. We handle the permit process for you and make sure the work is inspected and signed off correctly.

Can you install a new drain as part of a remodel or addition?
Yes. New bathroom additions, kitchen expansions, ADU conversions, and laundry rooms all require new drain lines, and we handle those installations from rough-in to final connection. We coordinate with your general contractor or project timeline to keep things moving.

Our drain work covers new drain installation for bathroom and kitchen additions, shower and tub drain replacement, floor drain installation in garages, utility rooms, and commercial kitchens, drain line re-routing for remodels, replacement of corroded or collapsed sections of existing drain pipe, and full drain re-pipe for properties with failing cast-iron or clay lines. We also handle the upstream and downstream connections—from the fixture to the main sewer line—so the whole system works as one.

There are several red flags that point homeowners toward a drain replacement rather than a simple service call; including persistent slow drainage in one or multiple fixtures even after clearing, a gurgling sound after water drains that indicates a venting problem or partial blockage, or sewage odors inside the home that do not go away. You should also watch for visible rust staining or water damage near drain lines.

Whether you are planning a bathroom addition, replacing an aging drain system, or dealing with a recurring backup that clearing alone cannot fix, Romo Plumbing can help. We serve San Pedro, Palos Verdes, Redondo Beach, Torrance, Long Beach, and all surrounding South Bay communities. Free estimates are available—call (310) 831-3138 or reach out online today.

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