Plumbing Service
Sink installation and repair done right the first time in San Luis Obispo, CA
A sink that leaks, drains slowly, or was never connected correctly is more than an annoyance. It can mean water damage under the cabinet, mineral staining, or a fixture that never quite works the way it should. Drain Doctors Plumbing installs new kitchen and bathroom sinks, replaces worn faucets, and repairs the supply lines, shutoff valves, and drain connections underneath the bowl.
Overview
Professional sink installation and repair from a team that checks the whole connection, not just the fixture
Drain Doctors Plumbing installs and repairs sinks across San Luis Obispo, Arroyo Grande, Atascadero, Avila Beach, Cayucos, Morro Bay, Nipomo, Paso Robles, Pismo Beach, and Templeton. We look at what's actually happening under the cabinet before touching anything, rather than swapping a part and hoping the same problem doesn't come back.
- Kitchen and bathroom sink installation, from a single bowl to a farmhouse-style basin
- Faucet replacement and repair for kitchen and bathroom sinks
- Under-sink supply line, shutoff valve, and P-trap repair
- Serving homes, condos, and rental properties across San Luis Obispo County
Get a new sink installed or an old one repaired by a team that looks at the supply lines, shutoff valves, and drain fitting, not just the bowl and faucet. Every visit ends with a dry cabinet and connections that hold under pressure, not a fixture that looks fine until the next time you run water.
- Flexible scheduling around your kitchen or bathroom
- Licensed and insured on every visit
- Locally owned, serving San Luis Obispo County since 1979
- Upfront pricing before any work begins
Mineral buildup in faucet cartridges
Hard water residue is a frequent cause of stiff handles and reduced flow
Aging shutoff valves
Original valves in older homes can corrode or stop turning cleanly
Worn P-traps and supply lines
Decades-old fittings underneath the sink are a common source of slow leaks
Good to know locally
San Luis Obispo's water and older homes put extra strain on sink connections
The City of San Luis Obispo Utilities Department's water quality report describes the city's water as moderately hard, drawn primarily from treated surface water sourced from the Salinas, Whale Rock, and Nacimiento reservoirs. Over time, that mineral content builds up inside faucet cartridges, aerators, and shutoff valves, which is a common reason a sink faucet starts dripping or a valve seizes up long before the sink itself is actually worn out. Housing age plays a role too. Many homes in San Luis Obispo and nearby communities like Atascadero and Paso Robles still have original supply lines and shutoff valves from decades ago, parts that were never designed to be serviced as often as modern fixtures are. When a sink gets replaced or repaired without addressing those aging components underneath, the new fixture is only as reliable as the connections feeding it.
How it works
Our 3-step sink installation and repair process
Diagnose and repair or install
We explain what needs replacing versus what can be repaired, then complete the work with fittings suited to your home's plumbing.
Test and verify
We run water, check for leaks at every connection point, and confirm proper drainage before we consider the job finished.
What's included in our sink installation and repair service
A proper sink job covers more than setting a new bowl in place or swapping a faucet. Our visit confirms the whole system underneath is sound before we call the work complete.
- Diagnostic check of the sink, faucet, and all under-sink connections
- Confirmation that supply lines and shutoff valves match the correct size and material
- Inspection of the P-trap and drain fitting for wear or improper slope
- Installation or repair of the sink, faucet, and any affected supply lines or valves
- Pressure and leak test at every connection before we leave
- A plain-language explanation of what caused the original problem
Our goal is a sink that drains properly, holds a tight seal at every joint, and does not need a callback for the same issue months later.
Built around your needs
Licensed plumbers who check the whole system
We do not treat a sink as an isolated part; the supply lines and drain connections get the same attention as the fixture itself.
Transparent pricing with no hidden fees
You know the cost before any repair or installation work begins.
Responsive service with accountability you can trust
If something is not right after we leave, we come back and make it right.
Signs it's time to schedule a plumbing inspection
A sink repair is sometimes the first sign of a larger issue worth a closer look. Consider a full plumbing inspection if you notice:
- A sink faucet that drips even after a cartridge replacement
- Slow drainage in more than one fixture at the same time
- Water stains or soft spots inside the cabinet below the sink
- Corrosion or mineral crust visible on shutoff valves
- A sink that was recently repaired elsewhere but still leaks
If any of these sound familiar, it is worth having our team take a broader look rather than replacing the same part again.
Ask about our maintenance plan
Drain Doctors Plumbing offers an ongoing maintenance plan for homeowners who want their plumbing system checked before small issues turn into repairs. A membership visit typically includes a check of supply lines, shutoff valves, and drain connections throughout the home, the same areas that most often cause sink problems over time.
- Priority scheduling for members
- Routine check of shutoff valves and supply lines
- Early identification of corrosion or mineral buildup
- Discounted rates on repair work
Ask our team if you are not sure whether a maintenance plan fits your home.
Why us
Why choose Drain Doctors
Established since 1979
Decades of experience with San Luis Obispo County homes and their plumbing systems.
Same-day service when available
We understand a leaking or non-functional sink cannot always wait.
Licensed and insured technicians
Every visit is performed by a fully licensed, insured plumber.
Transparent pricing
You know the cost before any work begins, with no hidden fees.
Locally owned and operated
A San Luis Obispo team that knows the area's housing stock and water conditions.
Serving all of San Luis Obispo County
Not sure if your address falls in our service area? Call (805) 467-1214 and we'll tell you directly.
Good to know
FAQ
A new cartridge fixes wear inside the faucet itself, but if the shutoff valve or supply line behind it has mineral buildup or a worn seal, the drip can return. We check the full connection, not just the cartridge, so the fix holds.
Yes. We regularly install customer-supplied sinks and faucets. We will confirm the fixture is compatible with your existing supply lines and drain setup before starting.
A straightforward faucet or sink swap is usually finished in a single visit. If supply lines, shutoff valves, or the P-trap also need replacing, we will let you know the added time before we begin.
Not always. A slow-draining bathroom or kitchen sink can also come from a poorly sloped P-trap or a partially closed shutoff valve. We diagnose the actual cause rather than assuming it is a clog.
Often, yes. Homes with original supply lines and valves from decades ago may need those components replaced alongside the sink itself, since the new fixture depends on them holding a proper seal.
We will inspect the existing installation, identify what was missed or done incorrectly, and correct it. We do not just replace parts without explaining what actually caused the leak.
Still have a question? Call us at (805) 467-1214
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Get in touch
Get your sink installed or repaired the right way
Whether you need a new sink set in place, a faucet replaced, or a leak traced back to its actual source, Drain Doctors Plumbing brings the same attention to the connections under the sink as we do to the fixture itself. Serving San Luis Obispo, Arroyo Grande, Atascadero, Nipomo, Paso Robles, and surrounding communities across San Luis Obispo County.
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Licensed, insured, and local since 1979. Get honest, upfront pricing before any work begins.