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TRUSTED BY HAWTHORNE, CA HOMEOWNERS

  • Average homeowner rating star icon4.6
    Average homeowner rating
  • Verified reviews icon480
    Verified plumbing services reviews

Top-Rated Plumbers in Hawthorne - Updated Nov 2026

Avatar for Alliance United Rooter & Plumbing Inc.
Alliance United Rooter & Plumbing Inc.
4.9(
123
)
Gas PipingSewer Main - Install, Replace or RepairWater Heater - Install or Replace+10 more

Serving Hawthorne, CA and surrounding areas

Approved

In business since 2004

Free estimates

Credit card accepted

We take great pride in our experience, expertise, quality, and customer service that we provide. It is our mission to provide excellent workmanship and complete customer satisfaction from the start to completion of a project. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

drain under kitchen sink
drain under kitchen sink
drain under kitchen sink
drain under kitchen sink
drain under kitchen sink

+62

4 neighbors recently requested a quote
Recommended by98%of homeowners
Avatar for Drain City Plumbing, Inc.
Drain City Plumbing, Inc.
4.4(
307
)
Sewer Main - Install, Replace or RepairDrain Clog or Blockage - ClearDrain Clog or Blockage - Clear - For Business+18 more

Serving Hawthorne, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2015

Free estimates

Emergency services offered

"I was extremely pleased to meet Tony today to install a new water heater in my condominium in Rancho Palos Verdes. Immediately when Tony came to the door, he introduced himself, shook my hand and was just an absolute pleasure to deal with. I think he is a straight shooter and I immediately since this was a fair dude. Tony is the owner of the company so it was fantastic to deal directly with the boss who could give me straightforward answers. I had received several quotes for this job ranging from $2700, $2900 and the best one was $6800 all for the same product. Tony quoted me $1795 and that is what I paid. I have struggled to find a local plumber who I connected with and now I think I finally found my man. His crew was polite and they were very efficient. I highly recommend this plumbing company."
Tankless Water Heater
south gate water heater
sewer alteration wilmington
Response time3 hrs
1 neighbors recently requested a quote
Recommended by85%of homeowners
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Plumbing FAQs, answered by experts

Pouring fats, oils, and grease down the kitchen sink creates severe blockages in aging cast iron drains. Overwatering your landscaping encourages tree roots to invade older sewer laterals. Using caustic chemical drain cleaners destroys the walls of aging pipes. You should flush your water heater annually to prevent rapid sediment buildup from the hard water supply in Hawthorne. Setting water temperatures above 120 degrees accelerates mineral scale formation across CA.

Helpful?

Evaluate the age of your property to determine if it needs plumbing upgrades. Hawthorne homes built between 1940 and 1975 feature galvanized steel supply pipes and cast iron drains that are well past their functional lifespan. Check your water quality for rust-brown discoloration, low pressure, or a metallic taste. These signs indicate severe pipe deterioration. Homes with mid-century slab foundations are prime candidates for under-slab leak evaluations in CA.

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The timeline for plumbing projects relies heavily on the scope and permitting requirements. A water heater replacement requires two to six hours of physical labor but takes one to two weeks total for local inspections. A whole-house repipe takes three to six weeks from start to finish. California statewide compliance standards add review time to larger projects. Schedule trenching work outside the winter rainy season to avoid weather delays in Hawthorne.

Helpful?

Older properties in Hawthorne require regular plumbing updates for galvanized steel supply pipes and aging sewer laterals. The hard water in this region accelerates mineral scaling inside pipes and causes rapid sediment buildup in water heaters. You should inspect mid-century cast iron drain lines for internal corrosion. Homes built on concrete slabs experience pinhole leaks in embedded copper pipes due to soil contact and electrolytic reactions across CA.

Helpful?

Look for slab-on-grade foundations, which eliminate crawl space access and complicate under-slab pipe repairs. Small lot sizes and narrow side yards in Hawthorne restrict exterior trenching. Properties built before 1980 feature asbestos in drywall or flooring, requiring strict abatement protocols before opening walls. Shared pipe systems in converted units also add complexity. Finally, CA seismic codes mandate flexible connections and gas shutoff valves for all water heater installations.

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The Hawthorne, CA homeowners’ guide to plumbing services

From average costs to expert advice, get all the answers you need to get your job done.