Plumbing How To & DIY

This Old House plumbing expert Richard Trethewey shows how to install a water conditioner to combat hard water.

Clogs, slow-draining sinks, and other plumbing issues can be a huge headache for homeowners. Read how to diagnose common issues in our guide.

Plumbing expert Richard Trethewey shows how to install a whole-house water filter to improve the taste and odor of drinking water.

Plumbing and heating expert Richard Trethewey returns to a home he visited four years earlier to replace a faulty hybrid water heater.

Ask This Old House plumbing and heating expert Richard Trethewey helps a homeowner install an indirect water heater onto an existing steam boiler to boost the amount of hot water in the house.

Ask This Old House plumbing and heating expert Richard Trethewey helps a homeowner figure out why one of her radiators is not working.

This Old House plumbing expert Richard Trethewey explains how a well water system pump works and how to fix common problems.

Ask This Old House plumbing and heating expert Richard Trethewey answers an email about a shower stained green and why it may be linked to soft water

Ask This Old House plumbing and heating expert Richard Trethewey helps a homeowner replace a tank water heater

Ask This Old House plumbing expert Richard Trethewey finds a rusty sink strainer in the kitchen and shows a homeowner how to replace it.

Watch as plumbing expert Richard Trethewey explains why lead may contaminate home drinking water and the best methods to combat it.

This DIY video and guide shows you how to repair a shower valve stem and get your shower running smoothly again.

Ask This Old House plumbing and heating expert Richard Trethewey helps a homeowner silence a shrieking shower

Ask This Old House plumbing and heating expert Richard Trethewey gives a tutorial on the types of PVC pipes and fittings.

In this guide, Ask This Old House plumbing expert Richard Trethewey shows you how to install a house hydrant to replace a leaky spigot.

Is your bathroom sink not draining? Here's everything you need to know to unclog hair, toothpaste, and other gunk from a slow-draining sink.

Ask This Old House plumbing and heating expert Richard Trethewey explains the many filter options and home water systems available for filtering drinking water

This Old House plumbing and heating expert Richard Trethewey makes heating water more efficient by installing a heat pump.

Ask This Old House plumbing and heating expert Richard Trethewey explains what may be causing a leaky toilet and possible solutions

Do you know the importance of your water heater's T&P valve? Maintaining it is crucial for the safety of your home and family.

Tired of your old faucet? Learn how to install a new touchless model from plumbing expert Richard Trethewey in our step-by-step guide.

This Old House plumbing and heating expert Richard Trethewey demonstrates one way to fix a noisy toilet by installing a new flush valve.

In our video and guide, we'll explain how to install a hybrid gas water heater to improve your hot water supply and energy efficiency.

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

Ask This Old House heating and plumbing expert Richard Trethewey explains the best practices for keeping your furnace up and running during the winter

This Old House plumbing and heating expert Richard Trethewey shows two no-solder ways to make watertight pipe connections

Need to install an undermount kitchen sink? Read our guide for practical tips and techniques to achieve a secure and efficient installation.

Learn how to replace a three-handle shower valve with an anti-scald valve from This Old House plumbing and heating expert Richard Trethewey.

This Old House plumbing and heating expert Richard Trethewey heads to Cheyenne, Wyoming, to help a homeowner install a new toilet

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