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S20 E22, Richard Trethewey teaches Kevin O’Connor about unclogging drains
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How to Unclog Any Drain

Plumbing and heating expert Richard Trethewey shows us every common household drain, and how to unclog them like a pro.

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How to Replace an Old Faucet

This Old House plumbing and heating expert Richard Trethewey shows the proper way to replace an old kitchen faucet

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How to Install a Pedestal Sink

Plumbing expert Richard Trethewey makes a challenging bathroom renovation task look easy

How to Replace Polybutylene Piping with PEX

Ask This Old House plumbing and heating expert Richard Trethewey travels to Richmond, Virginia to help a homeowner replace her polybutylene piping with conventional PEX.

How To Pump Water Out Of Your Basement 

Whether it’s caused by a hundred-year flood or a plumbing malfunction, no one wants a swimming pool in their basement. Here are some ways to get rid of that standing water in your basement. 

How to Snake a Toilet 

It’s always disheartening to realize you’ve got a clogged toilet that can’t be fixed with a plunger, but the good news is that another simple tool can help you address the problem—a snake or drain auger.

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How to Choose and Maintain a Garbage Disposer

This Old House plumbing and heating expert Richard Trethewey shares some tricks for removing—and avoiding—stubborn disposer jams

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How to Prevent Frozen and Burst Pipes

Ask This Old House plumbing and heating expert Richard Trethewey offers a few tips to keep water from freezing up in your pipes during the winter months.

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How to Prevent Frozen Pipes

In this how-to video, This Old House plumbing and heating contractor Richard Trethewey shows various ways to prevent and thaw frozen pipes.

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How to Replace a Bathroom Faucet

Need to update your bathroom sink faucet? Watch this DIY Smarts as Ask This Old House plumbing and heating expert Richard Trethewey demonstrates how to replace a bathroom faucet.

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What Can and Can't Go Down a Garbage Disposer

Ask This Old House plumbing and heating expert Richard Trethewey explains what foods should and should not go into garbage disposers.

How to Fix a Leaking Toilet

Here’s why your toilet might be leaking at the base and how to fix it to prevent costly structural damage.

How to Fix a Leaky Faucet

Learn about 4 types of faucets, what causes a faucet to drip, and how to repair them.

How to Stop Your Toilet from Sweating

Dry out your bathroom or install a sweat valve—a little warm water will keep the exterior of your toilets dry all summer long.

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How to Drain a Water Heater

In this how-to video, This Old House plumbing and heating contractor Richard Trethewey shows a quick and effective way to drain a sediment-filled electric water heater.

How to Remove Air in Water Pipes

If air is coming out of your water pipes, don’t worry, you may be able to easily fix it yourself. Read on to learn how to tell if air is in your water pipes, and how to get rid of it.

How to Unclog a Toilet Without a Plunger

Got a toilet clog, with no plunger in sight? Read this guide to learn how to unclog a toilet using only simple household items you probably have at hand.

How to Clean a Dryer Vent

Excessive dryer lint buildup can pose a fire hazard, so it’s important to clean it at least once a year. Read this guide to learn how to clean your dryer vent in five easy steps.

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How to Fix a Leaky Shut-Off Valve

This Old House plumbing and heating expert Richard Trethewey shows how to quickly and easily fix a faulty valve.

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How to Repair a 3 Handle Shower Faucet

Ask This Old House plumbing and heating expert Richard Trethewey repairs and replaces a leaky shower valve.

How to Increase Water Pressure on City Water

Here’s how to fix your water pressure if you’re on city water.

How to Install a French Drain

French drains serve to collect and remove groundwater that would otherwise cause a problem. They’re often used along driveways, in damp areas of a lawn, and around house foundations to help keep the basement or crawlspace dry. Read this guide to learn more about how to install a french drain in your yard.

People installing new combination boiler in a basement.
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How to Install a Combination Boiler and Hot Water Heater

Replace two devices, your water heater and boiler, with a single combi boiler unit that’s more efficient and compact.

How to Fix a Dishwasher That Won’t Drain

Dishwasher not draining? Repair can be an easy DIY project. Read our guide to diagnose and fix your dishwasher on your own.

How to Install a Kitchen Sink

From costs to tools and plumbing, here’s what to do for a new kitchen sink installation.

Plumbing expert demonstrating how to unclog a bathroom sink.
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How to Unclog a Bathroom Sink

Ask This Old House plumbing and heating expert Richard Trethewey reveals the best ways to unclog a slow draining bathroom sink.

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How to Fix a Shower Faucet

Learn how to replace an old shower valve with a single handle with This Old House plumbing and heating expert Richard Trethewey.

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Reattach an Undermount Kitchen Sink

Ask This Old House plumbing and heating expert Richard Trethewey uses undermount sink adhesive to reattach a stainless steel kitchen sink to a granite countertop.

How to Fix a Leaking Toilet

Identify parts and problems with this handy guide.

How to Install a Toilet

This Old House plumbing expert Richard Trethewey's method for putting in a new toilet—or replacing an old one.

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How to Get Hot Water with a Recirculating Pump

This Old House plumbing and heating expert Richard Trethewey explains how a recirculation line can save energy, money, and time

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Hydraulic Cement for Leaky Basements

Using the right product for patching holes where water seeps in will save you a trip back with a wet vac and a sump pump.