Electrical and Plumbing Hazards Under the Sink
Unsafe under-sink plumbing and electrical can cause leaks, sewer gas, water damage, or electrical shock. A home inspection helps identify these hazards before they become expensive or dangerous.
Trap for Plumbing
A plumbing trap holds water to block sewer gas. Missing P-traps, poor venting, loose joints, leaks, or corrosion can lead to odors, moisture damage, and costly repairs.
Gas Range (electric to gas conversion) – November, 2025
So you bought a gas range... Our intrepid homeowner switched from an electric range to a gas range. To accommodate the new range, any electrician could easily have changed the old 240-volt circuit to a 120-volt circuit, but our hero came up with a better way: Mangle the old range cord to make an “adapter.” Why is that a problem? Let us count [...]
Plumbing vents and B-vents – October, 2025
A Sirius problem? A few things are wrong here. The most obvious is the plumbing vent pipe that supports a satellite dish. Our plumbing code calls this “flagpoling” and prohibits it outright. Plumbing vents shouldn’t support any other objects, including television aerials, satellite dishes, and, of course, flagpoles. Flagpoling can cause the horizontal portion of the vent (in the attic) to sag and [...]
Plumbing drain system and test plug – September, 2025
The plumber knows he forgot something. He just can’t remember what. When plumbing a new house, plumbers must pressure-test the waste pipes to ensure that the system doesn't leak. Leaks might allow waste water or sewer gas to enter the house. So, when the drain piping is complete, the plumber inserts a test plug and fills the drain system with water all the [...]
Basement floor drains – August, 2025
Basement floor drains are supposed to *remove* basement water, not bring it in. One of the reasons that home inspectors run so much water during an inspection is to reveal problems like this one. The basement floor drain is connected to the main sewer line, which doesn’t drain fast enough. As a result, some water backs up into the basement. While this might [...]
TPR valves – July, 2025
Temperature and pressure relief (TPR) valves are critically important safety devices. When one fails or is improperly installed in a way that prevents it from doing its job, a traditional tank-style water heater can behave like a bomb (or a rocket). Here, a flush kit for a tankless water heater is installed upside down, placing a shut off valve between the hot water [...]
Plumbing Drains – May, 2025
A trombone comes to mind... Or maybe miniature golf. Drainpipes under a sink should be simple: a small U-shaped bend called a “trap” holds a plug of water to prevent sewer gas from rising out of the drain. This plug of water should never be more than 4” deep and the remaining drainpipes should be as short and direct as possible. The drain [...]
Plumbing – Mar, 2025
What is a toilet fill valve? A toilet fill valve performs the thankless plumbing task of refilling a toilet's tank after each flush. They come in a variety of configurations, based on the size, shape, and design of the toilet. A malfunctioning one can make the toilet run continuously or fail to refill the tank with the right amount of water. When they're [...]
Piping – Feb, 2025
PVC pipe is a no-no. This water heater has a 1/2" PVC extension tube on its temperature-pressure relief valve. PVC stands for Polyvinyl chloride, but a more suitable name might be “Pipe Very Cracky”. The piping is brittle and not rated for use inside a home generally, and especially not as an extension tube on a water heater temperature-pressure relief valve. In addition [...]
