Best Liquid Drain Openers: Top 10 Picks for Clogs

When confronting stubborn blockages within residential plumbing systems, chemical drain openers offer a rapid dissolution of organic matter and grease. The efficacy of a best liquid drain opener hinges on its chemical composition and formulation, designed to break down impediments without causing undue corrosion to common pipe materials like PVC or cast iron.

Exploring the market reveals a spectrum of solutions, from enzyme-based formulations that work over time to potent caustic agents designed for immediate impact. Understanding the nuances of these powerful solutions is crucial for homeowners and maintenance professionals alike. This curated selection delves into the leading contenders, showcasing the best liquid drain openers that balance effectiveness with safety.

Prepare to uncover which formulas stand out for their performance, ease of use, and overall value in restoring optimal drainage flow.

Find Your Flow: Top Picks Unclogged

Image	Product	Price
Best Pick 1	Clorox Liquid-Plumr Pro-Strength Clog Destroyer, Liquid Drain Cleaner, 80 Fluid	Check Price
Best Pick 2	Liquid-Plumr Pro-Strength Hair Eliminator Gel Clog Remover, Hair Clog Remover	Check Price
Best Pick 3	Liquid Fire Drain Line Opener, 32 Oz	Check Price
Best Pick 4	Green Gobbler Drain Clog Dissolver | Powerful Liquid Drain Opener	Check Price
Best Pick 5	Drano Max Gel Drain Clog Remover & Cleaner, Fast-Acting to	Check Price

1. Clorox Liquid-Plumr Pro-Strength Clog Destroyer, Liquid Drain Cleaner, 80 Fluid

Tired of stubborn clogs frustrating your day? The Clorox Liquid-Plumr Pro-Strength Clog Destroyer Gel offers a powerful, three-action solution designed to obliterate tough blockages.

Its advanced formula quickly tackles hair, grease, and soap scum, cutting through standing water for rapid drain clearing and restoring flow.

This potent 80-fluid ounce liquid drain cleaner is engineered to destroy even the most challenging clogs, working effectively in bathtubs, showers, and sinks. Featuring Pipeguard technology, it’s formulated to be safe for all types of pipes, including PVC, copper, and older pipes, as well as septic systems and garbage disposals, ensuring peace of mind with every use.

Pros

• Triple-Action Power: Effectively destroys clogs by protecting, preventing, and clearing blockages with its advanced formula, acting as a superior clog remover.
• Versatile Clog Elimination: Handles a wide range of common plumbing nuisances, including tough hair (2), grease buildup, and stubborn soap scum, making it a comprehensive drain cleaning solution.
• Pipe Protection: Incorporates Pipeguard to safeguard your plumbing system, ensuring its safety for PVC, plastic, copper, and even older pipes, as well as being septic-safe and disposal-friendly (3).
• Odor Control: Addresses and eliminates unpleasant drain odors, leaving kitchen sinks and bathroom drains fresh.
• Preventative Maintenance: Regular monthly use of this pro-strength formula helps maintain clear pipes and drains by preventing future clogs from forming (1).

Cons

• Not for Toilets or Plungers: This heavy-duty drain opener is specifically formulated for sink and tub drains and should not be used with a plunger or in toilets to avoid potential issues.

For those seeking an effective and reliable liquid drain opener, the Clorox Liquid-Plumr Pro-Strength Clog Destroyer Gel stands out. It provides a robust solution for clearing existing blockages and maintaining clear, odor-free pipes, making it an ideal addition to your home maintenance toolkit.

2. Liquid-Plumr Pro-Strength Hair Eliminator Gel Clog Remover, Hair Clog Remover

Tired of stubborn hair clogs that slow your drains to a crawl? Liquid-Plumr Pro-Strength Hair Eliminator Gel is your powerful, targeted solution. This advanced formula is specifically engineered to dissolve the most common cause of drain blockages, restoring flow quickly and efficiently without damaging your pipes.

Boasting 70% more actives than comparable products, this gel actively targets and eliminates thick hair clogs that frustrate homeowners. Its chemical drain opener formulation is designed for maximum effectiveness on slow-running sinks, showers, and bathtub drains, working where other remedies fail.

Pros

• Specialized Hair Clog Removal: Specifically formulated to obliterate hair clogs, the most frequent blockage culprit in household plumbing.
• Enhanced Power: Contains 70% more actives to clear difficult clogs the first time, reducing the need for repeat applications or manual intervention.
• Pipe and System Safe: Universally safe for all pipes, including PVC, plastic, metal, and older drain lines, as well as septic systems.
• Versatile Application: Effectively tackles hair blockages in bathroom sinks, kitchen sinks, showers, and bathtubs, providing a comprehensive clog remover.
• No Drain Snake Needed: Offers a potent chemical drain opener alternative to cumbersome and potentially damaging drain snakes for tough hair blockages.

Cons

• Not for Toilets or Garbage Disposals: This powerful formula should not be used in toilets or garbage disposals due to its concentrated nature and potential to damage internal mechanisms.

For an effective hair clog remover that delivers a powerful punch against stubborn drain blockages, Liquid-Plumr Pro-Strength Hair Eliminator Gel is an excellent choice. Restore your plumbing’s efficiency and say goodbye to slow drains with this targeted, pipe-safe solution, perfect for tackling the most persistent hair clogs in your home.

3. Liquid Fire Drain Line Opener, 32 Oz

Tired of stubborn clogs and slow-draining sinks, tubs, and showers? Liquid Fire Drain Line Opener offers a professional-grade solution to banish blockages and restore free-flowing pipes. This powerful formula is designed for rapid action, tackling even the toughest drain problems with impressive efficiency.

Formulated to deliver professional results, this 32 oz bottle of Liquid Fire is an essential tool for maintaining clear plumbing. Its unique chemical reaction generates instant heat upon contact with water, accelerating its ability to dissolve grease, hair, soap scum, and other common drain obstructions. This powerful drain cleaner is effective in a variety of plumbing systems, including those connected to septic tanks and their corresponding laterals.

This powerful drain cleaner is effective in a variety of plumbing systems, including those connected to septic tanks and their corresponding laterals.

Pros

• Professional Strength Clog Removal: Effectively dissolves and removes tough drain clogs in sinks, tubs, shower stalls, and even septic tanks and laterals.
• Instant Heat Generation: Reacts instantly upon pouring to create heat, accelerating the breakdown of blockages and ensuring a free-running drain, even in freezing conditions.
• Speed & Effectiveness: Works faster and more effectively than many leading household drain cleaners.
• Economical Choice: Offers a cost-effective solution for powerful drain cleaning needs, providing value for money.

Cons

• Corrosive Nature: As a highly effective chemical drain opener, users must exercise caution and follow all safety instructions carefully due to its potent chemical properties.

For those seeking a reliable and potent liquid drain opener, Liquid Fire Drain Line Opener is a superior choice. It provides a rapid and economical way to tackle persistent drain blockages, ensuring your plumbing systems function optimally. This is the ideal heavy-duty drain cleaner for homeowners and professionals alike tackling difficult clogs.

4. Green Gobbler Drain Clog Dissolver | Powerful Liquid Drain Opener

Tired of stubborn clogs and the hassle of plunging? The Green Gobbler Drain Clog Dissolver offers a powerful, no-mess solution that sinks through standing water to tackle tough blockages.

This potent liquid drain opener is specifically engineered to dissolve common culprits like hair, soap scum, toilet paper, and even flushable personal care wipes. Its advanced formula works efficiently to clear obstructions, ensuring your pipes and toilets remain obstruction-free. Designed for ease of use, the extra-wide bottle opening minimizes spills, and a built-in clear strip allows for precise application without messy measuring.

Designed for ease of use, the extra-wide bottle opening minimizes spills, and a built-in clear strip allows for precise application without messy measuring.

Pros

• Effectively dissolves hair, soap scum, toilet paper, and flushable wipes, making it a versatile clog remover for various blockages.
• Features user-friendly packaging with a wide opening and clear measurement strip to prevent splashing and ensure accurate dosing, setting it apart from messy alternatives.
• Safe for multiple pipe types including PVC, ABS, copper, and cast iron, and is also septic-safe, unlike harsh bleach or lye-based formulas.
• Bleach-free and odorless, providing a safer experience for your household and the environment while still delivering powerful pipe cleaning action.
• Each bottle contains up to two treatments, offering excellent value for tackling a single clog or maintaining clear plumbing.

Cons

• As with many powerful chemical drain openers, prolonged or frequent use on older, fragile plumbing systems warrants caution.

For homeowners and businesses seeking a reliable and safe drain cleaning solution, the Green Gobbler Drain Clog Dissolver stands out. Its ability to tackle a wide range of organic matter, coupled with its user-friendly design and commitment to safety, makes it an excellent choice for maintaining clear drains and pipes without the worry of harsh chemicals.

5. Drano Max Gel Drain Clog Remover & Cleaner, Fast-Acting to

Tired of stubborn clogs and slow-draining sinks? Drano Max Gel Drain Clog Remover offers a powerful, fast-acting solution to tackle your toughest bathroom and kitchen plumbing problems.

This #1 selling gel drain cleaner is specifically designed to cut through standing water and reach the source of blockages effectively. Its advanced formula works rapidly, often starting to clear obstructions in as little as 7 minutes, restoring optimal drainage without the need for harsh scrubbing or mechanical augers. Protect your plumbing while achieving clear drains.

Protect your plumbing while achieving clear drains.

Pros

• Fast-Acting Performance: Witness the power of Drano Max Gel as it begins breaking down clogs within 7 minutes for rapid relief from drain blockages.
• Effective on Tough Clogs: This gel formula pours directly through standing water to annihilate tough blockages, tackling everything from hair to grease buildup in sinks and tubs.
• Pipe Protection: Engineered with an ingredient to safeguard pipes against corrosion over time, ensuring the longevity of your plumbing system without compromising clog-clearing efficacy.
• Trusted Brand Reliability: As the #1 selling gel drain cleaner, Drano provides a dependable and accessible solution for home plumbing maintenance, saving you money on professional services.
• Versatile Application: Ideal for both bathroom and kitchen sinks, this drain opener is your go-to for resolving slow drains and complete clogs.

Cons

• Requires Careful Application: For optimal results and safety, it’s important to follow the pour and waiting time instructions precisely, especially for severe clogs.

For an immediate and effective solution to frustrating drain clogs, Drano Max Gel stands out as a superior choice. If you’re seeking a reliable liquid drain opener that works quickly and provides long-term pipe care, this powerful formula is designed to meet your needs, restoring efficiency to your home’s plumbing.

6. Green Gobbler Ultimate Main Drain Opener | Drain cleaner Hair

Tired of stubborn drain clogs that refuse to budge? The Green Gobbler Ultimate Main Drain Opener is your powerful solution, engineered to tackle even the toughest blockages in your main sewer lines and plumbing.

Experience the relief of a clear, free-flowing system with this advanced formula.

This high-density liquid drain cleaner boasts a revolutionary formula designed to sink through standing water and cling to pipes, effectively liquifying grease, hair, soap scum, baby wipes, and paper products. Its industrial-strength power makes it ideal for both emergency clog removal and proactive maintenance of your home’s plumbing system.

Pros

• Penetrates Deeply: Unique high-density formula sinks through water to reach and dissolve main line blockages, unlike lighter, surface-level drain cleaners. Specializing in hair and organic matter removal for plumbing repair and maintenance.
• Versatile Application: Effectively breaks down a wide range of common drain obstructions including grease, oils, soap scum, hair, facial tissues, and even sanitary wipes, making it an ideal heavy-duty drain clog remover.
• Pipe & Septic Safe: Formulated to be tough on clogs but gentle on your pipes, including PVC, metal, and ABS. It’s also safe for use in septic systems, offering peace of mind for all homeowners.
• Odorless & Non-Flammable: Unlike harsh chemical drain openers, this cleaner offers an odorless experience and is non-flammable, providing a safer option for household use in kitchens, bathrooms, and laundry rooms.
• Trusted Guarantee: Backed by the Green Gobbler Guarantee, ensuring customer satisfaction with a 30-day money-back promise for this powerful drain solvent.

Cons

• While effective for main lines, may require multiple applications for extremely complex or long-standing blockages.

Whether you’re facing an immediate plumbing emergency or looking to prevent future issues, the Green Gobbler Ultimate Main Drain Opener is a professional-grade solution for maintaining clear and functional main drain lines. Its advanced formula and pipe-safe design make it a top choice for effective clog removal and drain maintenance.

7. Instant Power Hair and Grease Drain Cleaner – Shower Drain

Struggling with stubborn clogs? Instant Power Hair and Grease Drain Cleaner offers a powerful solution, working in minutes for all your household drains.

Specifically formulated as a shower drain cleaner, this potent formula liquefies hair and melts grease, preventing damage to pipes. It’s 20x stronger than typical drain openers, making it a reliable choice for clearing blockages and eliminating unpleasant drain odors. Its odorless, fume-free nature makes it a user-friendly option for home use, safe for septic systems.

Pros

• Rapidly dissolves tough hair clogs and melts away grease build-up, providing a quick and effective clog solution.
• Safe for all types of sinks, tubs, showers, RV drains, and septic systems, offering versatility without pipe damage concerns.
• Odorless and fume-free formula ensures a pleasant user experience, a significant advantage over many stronger chemical drain openers.
• Its concentrated liquid formula is easy to pour directly into drains, requiring no tools or complicated steps for immediate clog relief.

Cons

• As with any powerful drain opener, it’s important to follow instructions carefully and avoid contact with skin and eyes.

For those seeking a reliable hair and grease drain cleaner, Instant Power delivers serious clog-busting power. It’s an excellent choice for maintaining clear pipes and preventing future blockages in your kitchen and bathroom drains.

Ensure your home stays fresh and flowing smoothly with this advanced drain clearing solution.

8. Clorox Liquid-Plumr Pro-Strength Clog Destroyer, Liquid Drain Cleaner, 32 Fluid

Tired of stubborn clogs and slow drains? The Clorox Liquid-Plumr Pro-Strength Clog Destroyer Gel offers a powerful, 3X action solution to conquer even the most challenging blockages, restoring your plumbing to optimal flow quickly and effectively.

This advanced liquid drain cleaner is expertly formulated to tackle tough clogs caused by hair, grease, and soap scum. Its potent gel formula cuts through standing water, ensuring total blockage clearance while remaining safe for all your pipes, including PVC, plastic, copper, and older systems, thanks to its Pipeguard technology. It also neutralizes drain odors, leaving your sinks and tubs fresh.

Pros

• Destroys Tough Clogs: The 3X action formula effectively dissolves hair, grease, and soap scum, eliminating severe drain blockages and standing water for a clear passage.
• Pipe Protection: Featuring Pipeguard, this drain opener is safe for all pipe types (PVC, plastic, copper) and is also safe for septic systems and garbage disposals, preventing damage.
• Odor Elimination: Beyond clearing clogs, it works as an effective odor eliminator, addressing unpleasant smells emanating from drains in bathtubs, showers, and sinks.
• Preventative Maintenance: Regular monthly use as a preventative measure helps stop future clogs before they start, maintaining clear pipes and preventing recurring drain issues.

Cons

• Not suitable for use with plungers or in toilets, as it is specifically designed for sink and tub drains.

For a reliable solution to your plumbing woes, the Clorox Liquid-Plumr Pro-Strength Clog Destroyer stands out as a top-tier liquid drain opener. Its strong, yet pipe-safe, gel formulation makes it an indispensable tool for maintaining healthy, free-flowing drains in any household.

9. Amazon Basics Max Strength Drain Cleaner Gel, Hair Clog Remover,

Tired of stubborn clogs and slow-draining sinks? Amazon Basics Max Strength Drain Cleaner Gel offers a powerful, lab-tested solution designed to tackle tough blockages. This effective hair clog remover and grease dissolver provides a fast-acting formula to restore your drains to optimal flow, offering a reliable alternative for maintaining household plumbing.

This effective hair clog remover and grease dissolver provides a fast-acting formula to restore your drains to optimal flow, offering a reliable alternative for maintaining household plumbing.

This potent formula combats hair, grease, and gunk with remarkable efficiency, delivering maximum strength for even heavy clogs. Designed for optimal performance at room temperature and best results when flushed with very hot water, this drain opener is safe for all pipes, garbage disposals, and septic systems, ensuring it won’t cause corrosion or damage. Its quick-action capability begins dissolving blockages on contact, making it ideal for clearing slow-flowing drains effectively and swiftly.

Its quick-action capability begins dissolving blockages on contact, making it ideal for clearing slow-flowing drains effectively and swiftly.

Pros

• Max Strength Formula: Lab-tested gel expertly dissolves stubborn hair, grease, and gunk, providing superior clog removal compared to weaker alternatives.
• Safe on All Pipes: This phosphate-free formula is safe for use on all types of pipes, including those in garbage disposals and septic systems, without risking damage or corrosion.
• Quick & Effective Action: Starts working immediately upon contact to cut through water blockages, rapidly clearing slow drains and preventing water backup.
• Easy-Pour Design: The “No-Glug” bottle minimizes splashing, and the ergonomic handle ensures precise and effortless application, enhancing user safety and convenience.
• Versatile Application: Suitable for kitchen, bathroom, shower, and tub drains; it’s also recommended for monthly maintenance to prevent future plumbing issues and keep drains clear.

Cons

• Not for Toilets: This product is specifically not intended for use on clogged toilets, requiring a different solution for such blockages.

For those seeking an effective and reliable liquid drain opener, Amazon Basics Max Strength Drain Cleaner Gel provides a compelling solution. If you’re looking for a powerful hair clog remover, grease dissolver, or general drain clog remover, this product offers a convenient and safe way to maintain clear and free-flowing drains throughout your home.

10. Thrift T-200 Drain Cleaner – 2 lb Odorless Drain Opener

Tired of stubborn clogs? The Thrift T-200 Drain Cleaner offers a professional-strength, odorless solution to quickly dissolve grease, hair, and soap scum.

Experience the power of this fast-acting formula, activated by hot water, for efficient and effective drain maintenance in your home or business.

This 2 lb container of Thrift T-200 features a highly durable, non-acidic formulation designed for powerful drain opening. Its gentle yet effective action is safe for various plumbing systems, including septic tanks and sewer lines, making it an ideal choice for both commercial and residential applications seeking reliable drain repair.

Pros

• Professional Strength for Tough Clogs: Effectively breaks down common blockages like grease, hair, and soap scum, restoring proper drain flow for sinks, tubs, and showers.
• Odorless and Non-Acidic Formula: Eliminates unpleasant chemical smells associated with many drain openers, and its non-acidic nature protects delicate fixtures and pipes from damage.
• Activated by Hot Water for Fast Action: The specialized formula works quickly when mixed with hot water, providing rapid relief from clogged drains without extensive waiting times.
• Versatile Application: Suitable for use in small household drains, grease traps, septic systems, and sewer lines, offering a comprehensive solution for various plumbing needs.
• Safe for Most Surfaces: When used as directed, it won’t harm fine fixtures, chrome trim, or plastic pipes, ensuring a safe and effective drain cleaning experience.

Cons

• Requires hot water activation for optimal performance, making it less convenient for immediate use in cold water situations.

The Thrift T-200 Drain Cleaner stands out as an excellent choice for anyone tackling persistent drain blockages. Its odorless, professional-grade formula delivers powerful results while safeguarding your plumbing, making it a reliable solution for maintaining clear and free-flowing drains in any setting.

How to Select the Best Liquid Drain Opener

Formulation and active ingredients

The chemical composition determines a drain unblocker’s efficacy and suitability for your plumbing system.

Understanding the active ingredients is paramount to effectively tackling stubborn blockages without causing damage. Different formulations, such as alkaline (like sodium hydroxide or potassium hydroxide) and oxidative (like sodium hypochlorite or hydrogen peroxide), are designed to break down various types of clogs. Alkaline agents excel at dissolving grease, fats, and soap scum by saponification, while oxidative chemicals are powerful oxidizers that can break apart organic matter like hair and food debris.

Alkaline agents excel at dissolving grease, fats, and soap scum by saponification, while oxidative chemicals are powerful oxidizers that can break apart organic matter like hair and food debris.

Pay attention to the concentration of these active ingredients, as higher percentages generally indicate greater dissolving power, crucial for heavily obstructed drains. Equally important is considering the safety of the chemicals used. Certain potent solutions can corrode metal pipes or harm beneficial bacteria in septic systems.

Certain potent solutions can corrode metal pipes or harm beneficial bacteria in septic systems. Therefore, look for products specifically stating their compatibility with different pipe materials and their safety for septic tanks, ensuring a clear drain without compromising your home’s infrastructure.

Application and usage instructions

The ease of application and specific usage directives are paramount for achieving effective drain clearing.

A product’s formulation should enable straightforward pouring without excessive splashing or fumes, ensuring user safety and convenience. Equally critical is understanding the required dwell time, as products necessitating prolonged waiting periods may be less practical for urgent clogs.

Furthermore, knowing whether a pretreatment, like pre-rinsing with hot water, or a follow-up flush is needed clarifies the complete unclogging process and its potential demands on your time and resources.

Different plumbing scenarios demand tailored approaches. For instance, a robust solution might be ideal for tough kitchen grease clogs, while a gentler formula could be preferable for sensitive bathroom drains prone to hair buildup.

Always consult the product label for precise guidance, as optimal performance often hinges on following these directed methods for kitchen sinks, bathroom plumbing, and toilet bowls.

Environmental and safety considerations

The environmental impact and inherent risks associated with drain clearing solutions demand careful attention.

Choosing a product that minimizes harm to plumbing and the broader ecosystem is paramount for responsible home maintenance. When dealing with tough clogs, the chemical composition of a drain opener plays a crucial role in determining its safety for your home’s infrastructure and the planet.

Look for formulas that prioritize biodegradability, ensuring they break down naturally without leaving persistent residues in wastewater systems. Furthermore, consider the safety profile for your household members, especially children and pets, as some powerful chemicals can cause severe irritation or burns upon contact.

Adequate ventilation is non-negotiable; potent fumes released by certain drain cleaners can be hazardous to inhale and may require prolonged airing of the space. Moreover, aggressive chemicals can lead to significant pipe damage, causing corrosion or weakening materials over time, potentially leading to costly repairs far exceeding the initial product cost. Prioritizing gentler, yet effective, plumbing solutions offers peace of mind and protects both your home’s integrity and the environment.

Effectiveness and speed of action

The speed at which a drain clearing solution acts is paramount to its overall utility.

You want to resolve plumbing blockages efficiently, minimizing downtime and inconvenience. A product that works quickly can often tackle clogs before they become major issues, saving you from more costly and time-consuming repairs.

Consider how frustrating it is to have a backed-up sink or shower; a rapid-acting formula is your best ally in these situations.

When evaluating these treatments, look for indications of their typical success rate, often expressed as a percentage of common obstructions they can dissolve. The most effective options will reliably address both minor buildup and more persistent, deep-seated blockages without requiring multiple applications. Beyond immediate results, some formulations offer long-term benefits; they can help prevent the gradual accumulation of grease, hair, and other debris that leads to future clogs, promoting smoother pipe flow over time.

Beyond immediate results, some formulations offer long-term benefits; they can help prevent the gradual accumulation of grease, hair, and other debris that leads to future clogs, promoting smoother pipe flow over time. Trustworthy products will demonstrate this dual action: immediate power and sustained preventative maintenance for your plumbing.

Quick Best Liquid Drain Opener Buying Checklist

• Identify the Clog Type Determine if it’s grease, hair, soap scum, or a combination.
• Check Pipe Material Ensure the opener is safe for your plumbing (PVC, metal, etc.).
• Read the Label Instructions Always follow manufacturer guidelines for application and safety.
• Consider Septic System Compatibility If you have a septic tank, choose an opener that’s safe for it.
• Prioritize Ventilation Use in a well-ventilated area to avoid inhaling fumes.
• Test in a Small Area If unsure, perform a spot test before a full application.

Frequently Asked Questions

How Quickly Do Liquid Drain Openers Typically Work?

Most liquid drain openers begin working within 15-30 minutes, but some may require several hours or overnight to fully dissolve tough clogs.

Are Liquid Drain Openers Safe For All Types Of Pipes?

Generally, yes, but it’s crucial to check the product label. Some stronger formulations may not be suitable for older or specific pipe materials like old copper or lead pipes.

Can I Mix Different Liquid Drain Openers Together?

Never mix different drain openers or use them immediately after another chemical product. This can create dangerous fumes or chemical reactions.

What’S The Difference Between Alkaline And Oxidative Drain Openers?

Alkaline openers break down grease and organic matter, while oxidative openers use bleaching agents to dissolve hair and other debris.

How Can I Prevent Future Drain Clogs?

Regularly clean your drains, use drain strainers, and avoid pouring grease or food scraps down the sink. Running hot water can also help clear minor build-up.

Final Words

Choosing the best liquid drain opener can swiftly restore your plumbing and bring peace back to your home. These powerful solutions effectively tackle common blockages, saving you time and the cost of a plumber.