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S20 E33, Richard and Ross Trethewey explain air flow efficiency to Kevin O’Connor
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Understanding Air Flow in Your House

Plumbing and heating expert Richard Trethewey and home technology expert Ross Trethewey explain everything you need to know about balancing airflow within a home.

Installing a natural gas barbecue grill
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How to Install a Natural Gas Barbecue Grill

This Old House plumbing and heating expert Richard Trethewey installs a natural gas line for a barbecue grill

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How to Install an Electronic Air Cleaner

Improving indoor air quality with This Old House plumbing and heating expert Richard Trethewey

Side of a house with an outdoor faucet.
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How to Install an Outdoor Faucet

Learn how to add a new hose spigot with This Old House plumbing and heating expert Richard Trethewey.

Inside TOH segment on cleaning up mold
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How to Clean Up Mold

In this how-to video, This Old House plumbing and heating expert Richard Trethewey and host Kevin O'Connor discover ways to rid a home of mold

S20 E31, Richard Trethewey installs a water filter
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How to Install a Reverse Osmosis Water Filter

This Old House plumbing and heating expert Richard Trethewey removes the impurities, VOCs, and excess minerals from water with a simple reverse osmosis water filter system.

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How to Install a Garbage Disposal

Garbage disposals are a helpful tool to help prevent pesky kitchen odors, as well as stop food from going down the pipes and causing plumbing issues. Watch as Ask This Old House plumbing and heating expert Richard Trethewey demonstrates how to install a garbage disposal in your kitchen.

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How to Choose Water Saving Plumbing Fixtures

Ask This Old House plumbing and heating expert Richard Trethewey and host Kevin O’Connor discuss the different ways to identify water-saving plumbing fixtures

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How to Install a Water Filter Under the Sink

Ask This Old House plumbing and heating expert Richard Trethewey travels to Los Angeles to update a water filter to preserve the look of a retro faucet

S20 E30, Richard Trethewey with toilet seats
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How to Replace a Toilet Seat

This Old House plumbing and heating expert Richard Trethewey shows us how to replace a toilet seat, explaining the standard shapes of seats and the potential problems a DIYer might encounter.