How much does it cost to replace a kitchen sink drain?

Replacing a kitchen sink drain can cost anywhere from $100 to $500 on average, with most homeowners paying around $250 for parts and labor. The exact cost depends on several factors:

What affects the cost to replace a kitchen sink drain?

Here are some of the main things that influence the total replacement cost:

• Type of drain: Basic basket strainers cost less than specialty drains like soap dispensers or hot water dispensers.
• Drain size: Larger diameter drains cost more than standard 1 1/2″ or 1 1/4″ drain sizes.
• Sink material: Stainless steel sinks run higher than porcelain sinks.
• Garbage disposal: Adding or replacing a garbage disposal adds $75-$150.
• Plumbing access: Easily accessible plumbing underneath costs less than hard-to-reach plumbing.
• Labor: Hourly rates for plumbers range from $45-$150 per hour.
• Parts and accessories: Supply lines, P-traps, washers and other parts add cost.
• Location: Labor rates are higher in expensive urban areas.

Average cost to replace a kitchen sink drain

Here are some typical costs for common kitchen sink drain replacement scenarios:

Drain replacement	Typical range
Basic basket strainer	$100 – $250
Basket strainer with garbage disposal	$325 – $500
Hot water dispenser drain	$350 – $550
Soap dispenser drain	$300 – $450

As you can see, costs for a basic basket strainer replacement in an accessible sink run from around $100-$250. More complex jobs with specialty drains, added garbage disposals, or other unique factors can cost $500+ in some cases.

Steps to replacing a kitchen sink drain

Replacing a kitchen sink drain involves the following general steps:

1. Turn off water supply lines and drain the sink.
2. Disconnect supply lines, remove P-trap and drain tailpiece.
3. Unscrew flange assembly and remove old sink strainer/drain.
4. Clean sink opening thoroughly.
5. Apply plumber’s putty around new drain basket and install strainer.
6. Re-install P-trap, drain tailpiece, supply lines.
7. Check for leaks after turning water back on.

The process takes 1-3 hours with basic tools like wrenches, pliers, putty knives and buckets. Hiring a pro can make the job much faster and easier.

Factors increasing your replacement cost

Certain factors can significantly increase the cost of your kitchen sink drain replacement project:

• Garbage disposal installation: Adding a new garbage disposal adds $75-$150 in labor and equipment costs.
• No existing garbage disposal: If you don’t have a disposal, installing new drain plumbing for one costs $125-$250.
• No shutoff valves: Replacing old shutoff valves adds $50-$100 in parts and labor.
• Cast iron drain lines: Replacing corroded cast iron drain lines costs $200-$500 more.
• No access below: Accessing plumbing below a concrete slab foundation costs $200-$300 more.
• Faucet replacement: Combining with a faucet replacement project adds $150-$300 typically.
• Specialty parts: Unique or proprietary drains found in some sinks cost more than standard parts.
• Weekend/emergency rate: Expect to pay 25-50% more for urgent or off-hours repair.

How can I save money on kitchen sink drain replacement?

Here are some tips to save on your kitchen sink drain replacement costs:

• Shop around to compare plumber estimates and look for coupons.
• Consider handyman services to save 25-50% on labor rates.
• Purchase compatible parts online to avoid retail markups.
• Avoid combinations with faucet replacement or garbage disposals.
• Ask about discounted rates for simple strainer swaps.
• Get the work done during normal weekday hours.
• Complete prep work like clearing under sink space yourself.
• Hire on an annual maintenance plan for lower per-job costs.

When is professional help recommended?

While DIY kitchen sink drain replacement is totally feasible for many homeowners, you may want to call a pro plumber in these situations:

• You have no previous plumbing experience.
• The sink has complicated integrated accessories.
• Drain lines are corroded or need full replacement.
• The project involves adding new drain line plumbing.
• You need other sink or faucet repairs done as well.
• The sink is a heavy material like cast iron or stone.
• Drain connections are in awkward, hard-to-reach spots.

Conclusion

A typical kitchen sink basket strainer replacement project costs $100 to $250 in parts and labor. Costs can range higher with more complex jobs involving garbage disposals, specialty drains, difficult access, or full drain line replacement. Whenever your current kitchen sink starts to drain slowly or shows leaks, getting the drain replaced by a qualified plumber is the best solution for restoring fast drainage and preventing water damage.