Questions tagged [testing]

91 questions
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Is there a good way to test water quality in your house?

What are the best ways to test for water quality in your house? The water is from a well, not town water. Are there any products that can continuously test the water coming in (versus manually sampling the water every so often)?
caseyboardman
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How can I test network and coax jacks?

We bought new house and I need to test network (RJ45) and coax jacks to see which ones are working. How can I do that without actually connecting computers/cable boxes?
sergeb
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What is a good tutorial on the use of a multimeter?

I am ashamed to admit, that despite my many electrical (mis?)adventures.. I have no idea how to use a multimeter. I have installed automobile sound systems, central air air-conditioners, and every kind of lighting, computer, telephone, etc. blah…
alex gray
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Unexpected voltage with switch turned off

I am doing some work on a ceiling light and I notice that, even though the light-switch is off, my voltage tester shows voltage present. Answers to other questions (below) explain about phantom voltages but how exactly do I test for these and know…
RedGrittyBrick
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Is there a cheap way to test for mold spores?

We had toxic mold during the wintertime, which has been removed, by replacing the affected Sheetrock. However, my wife has often still the same symptoms she had at the time. Getting a contractor with the proper equipment out is very expensive. Are…
txwikinger
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Testing closed refrigerant lineset/equipment with pressurized air instead of nitrogen

Can you test a closed refrigerant lineset/equipment with pressurized air instead of nitrogen? I am guessing not but what would happen if you did?
amphibient
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What happens when using a GFCI Tester on a non-GFCI outlet?

I have an outdoor power outlet of which I'm not sure if it's GFCI or not (House was built in 1978). The outlet does not have Test/Reset buttons, but I don't know if outdoor outlets even have them. There's no labeling for GFCI anywhere,. So I'm…
Michael Stum
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How should I test my home's humidity?

We have recently replaced the windows in our home and insulated the basement, making the house much more airtight. This combined with the fact that our dryer currently vents into the basement, we have no bathroom fans or a range hood fan makes me…
Heather
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What DIY tests are available for the quality of stainless steel?

How can I test a stainless steel product such as a sink to see if it is truly 18g?
zundarz
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Does a gas pressure test lose pressure without leaks?

Context I am adding one branch with two sub-branches to my gas line to supply a fireplace and a range stove. I am testing the branch for leaks. I have a cap on one side of the branch, a valve shut off at the fire place, and placed a gauge at the…
Max
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When, if at all, are Insulation Resistance (or Megger) tests on an electrical system useful?

I had some close (though not direct) lightning strikes that fried some electronics and appliances (computer, TV, AC, modem, router, spread across several circuits) over several years / storms. I had some electricians out to to give quotes to…
mmathis
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How to test existing ethernet cable outlets?

I moved into this 15 year old house about a year ago and there's a RJ45 wall jack in my office (2nd floor) and there's another one in the living room near TV. I'd assume there's planned in for TV to use Internet. I have not seen any other RJ45 jack…
L l
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Air Admittance Valve Testing Equipment For Inspection

I have an Oatey air admittance valve (AAV) installed in my home as part of an improvement project. Today the inspector came and said that the AAV would have to be tested with an air admittance valve testing device, and that I should contact a…
Erik
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How to test if a dishwasher's below the floor heating element is faulty?

My dishwasher uses a Bauknecht 2040W heating element: Can you test if it's faulty using a continuity test? If so, is the continuity test between: ground and the positive, ground and the negative, or the positive and the negative? Testing…
Alex
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How do I test a 5V doorbell transformer?

In this post, both the OP and responder discuss testing a transformer. I'd like to know exactly how the user tested the transformer. I have a 5V doorbell transformer which I would like to test. Is an ohmmeter all I need? If so, how do I do it?
zundarz
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