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San Gabriel Valley
Pasadena plumbing for historic & mid-century homes
Pasadena's housing includes historic neighborhoods and documented mid-century Modern residences, so a plumbing plan has to respect both the building's era and later alterations. An older bathroom with valued finishes needs a different access strategy from a mid-century home with concealed lines. The objective is to locate the actual fault while avoiding unnecessary disturbance to features the owner wants to retain.
Older supply and drain systems need evidence
Discolored water, repeated stoppages and unexplained moisture are useful clues, but they do not identify pipe material or prove the whole system needs replacement. We inspect accessible lines, review the repair history and use targeted diagnostics when required. Sewer-camera findings can help decide whether cleaning is enough or a damaged section needs attention. Where a property has preservation requirements, confirm any applicable approvals before altering protected features or equipment locations.
Updating hot water without an oversized project
Long delivery time to a bathroom should be distinguished from a heater that cannot sustain temperature. A tankless installation needs verified gas capacity, suitable vent termination, electrical supply and service clearance. Existing openings may not be reusable, especially where the route conflicts with a finished facade or roof detail. We explain those constraints before equipment is selected. The permit process follows the address and work proposed, with inspection requirements included in the plan.
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Pasadena services
Plumbing services in Pasadena
Tankless Water Heaters in Pasadena
Gas and electric tankless installation, repair and maintenance. Authorized Rinnai dealer — save up to $2,200 on a new residential install.
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Tank & Heat Pump Water Heaters in Pasadena
Same-day repair and replacement of tank and heat pump water heaters.
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Drain Cleaning & Hydro Jetting in Pasadena
Clogged drains cleared fast, with camera verification.
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Sewer Camera Inspection in Pasadena
See exactly what's in your sewer line before you spend a dollar on repairs.
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Leak Detection & Smart Shutoffs in Pasadena
Find hidden leaks and install automatic leak-detection devices.
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Whole-Home Repiping in Pasadena
Replace failing galvanized or copper pipes with PEX or copper.
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Water Softeners & Filtration in Pasadena
Water softener installation and repair, whole-home filtration and scale cutters.
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Reverse Osmosis Installation & Maintenance in Pasadena
Under-sink and whole-home RO installed, serviced and filter changes on schedule.
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Sewer & Drain Smoke Testing in Pasadena
Non-toxic smoke run through sewer and drain lines to find leaks, cracks and bad joints.
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Trenchless Sewer Repair & Replacement in Pasadena
Fix or replace a broken sewer line without trenching up your yard, driveway or slab.
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Gas Line Repair & Installation in Pasadena
Gas leak repair, new gas lines for appliances, and pressure testing.
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Backflow Testing & Repair in Pasadena
Annual backflow testing, repair and replacement for homes and businesses.
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Commercial Plumbing in Pasadena
Restaurants, offices, multi-family and property managers.
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Pasadena plumbing guides
Gas Line Repair & Installation in Pasadena, CA
Older piping, appliance upgrades, and earthquake movement can create gas line concerns for Pasadena homeowners. Learn the warning signs, what professional service involves, and when to leave your home and call for emergency help.
Trenchless Sewer Repair & Replacement in Pasadena
A damaged sewer line does not always require digging up your Pasadena yard. Learn when trenchless repair makes sense, what affects replacement costs, and how to choose a qualified plumber.
Sewer & Drain Smoke Testing in Pasadena, CA
Persistent sewer odors can point to a dry trap, failed seal, or hidden drain or vent defect. Learn how a plumbing smoke test helps Pasadena homeowners narrow down the cause.
Reverse Osmosis Installation & Maintenance in Pasadena
A properly selected and maintained reverse osmosis system can improve drinking water at your Pasadena kitchen tap. Learn what installation involves, which warning signs need attention, and how to keep your system working reliably.
Water Softeners & Filtration in Pasadena, CA
Pasadena homeowners need water treatment matched to their water supply, plumbing, and household priorities. Learn when a softener, whole-house filter, or drinking-water system makes sense—and when repairs should come first.
Whole-Home Repiping in Pasadena: A Homeowner’s Guide
Aging water lines can cause recurring leaks, rusty water, and weak flow in Pasadena homes. Learn when whole-home repiping makes sense, what the work involves, and how to choose a qualified plumber.
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What Leon Plumbing customers say
Leon Plumbing on Google
4.9 out of 5 · 129 reviews
“Leon Plumbing’s team were great to work with! I had a minor leak coming from my kitchen sink and the team came out immediately and fixed the problem. Communication was easy and straightforward. Thank you to our tech Mario and Datevig and Sevan for a smooth experience!”
Erika Liu Wong
via Google“I needed a service for a Rinnai tankless water heater for a tenant in Eagle Rock. I called Leon plumbing and was surprised that they could have a tech out in about an hour. The tech did a complete service for $275, which seemed somewhat reasonable, and a needed valve replacement for another $275, which (though steep) was at least done quickly. I would recommend them for speed, good communications, and quality of the work.”
Steve Wolf
via Google“Excellent service! Sevag was super helpful and the team came out very quickly, fixed our water heater and made the whole process easy. We are extremely happy with their outstanding work and we highly recommend them!”
Despina Spanidou
via Google“As always, excellent service. This is my go-to plumber. Reliable, responsive, efficient.”
Steven Graubard
via Google“Very good service and anytime I call ready for the service god bless them 🙏”
Kevork Ashjian
via Google“⭐⭐⭐⭐⭐ Sevag is excellent! He is professional, reliable, and knowledgeable, and takes pride in doing quality work. He explains everything clearly, is dependable, and makes sure the job is done right. It’s hard to find someone you can trust, and Sevag definitely delivers! I highly recommend him to anyone looking for outstanding plumbing services.”
Joseph Khankhanian
via GoogleLatest written reviews from our main Leon Plumbing listing · Updated Oct 30, 2026
Leon Plumbing Advantage
Pay less for every plumbing visit — for $34.99/mo.
- Free $149 whole-home inspection
- $99 dispatch fee waived*
- 10% off all repairs & labor
- Same / next-day priority
- 2-year workmanship warranty
- 50% off after-hours premium