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Watch Basics of Your Home’s Plumbing – The Home Depot

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Learn about the secret life of your home’s plumbing system, including how water flows into your home and how the drainage system flows into the main stack. Discover tips on how to improve your water pressure as well as how to clean out clogs.

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34 Comments

  1. seen several posts disputing the "larger pipe = higher pressure" bit. i think it is a valid statement, considering what we're dealing with.

    faucets and shower heads don't actually displace that much water, so by increasing the volume, it can effectively increase the perceived pressure. i think what he meant was that if multiple faucets are going, or washing machine is going while shower is going, and the shower head doesn't spray with enough pressure, increasing the pipe size, which will allow more volume, will then restore the shower head's ability to produce a perceived gain in pressure. i believe he was using "pressure" as a misnomer, but there is an inverse relationship between pressure and volume and there was some validity to what he said.

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  2. Did you notice how many vents were close to each other in the opening illustration? Any experienced plumber wouldn't do that. They would've grouped them together and send never out anyway….. 

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  3. Water supply pipes must be sized according to the code that is used in the municipality.  The most used code in the US is the IRC.  1/2" copper pipe meets the code for most single fixtures, but may not meet code for more than one fixture.  To determine the size of the main supply, you have to count all the fixtures in the house, then add together all the assigned values, in fixture units, to get the total fixture units.  You also have to account for the distance from the meter to where the water enters the house, and if the house is higher than the meter, or lower.  It is far more complicated than this video makes it seem.  Most houses will need at least a 1" supply line from the meter, and will probably need an even bigger one.  Then, every section of pipe inside the house must be sized to carry its particular load.  That is also done by counting the number of fixture units it serves.  BTW, most residential plumbing is done with PEX tubing now, and you need to have the PEX manufacturer's sizing chart to correctly size it.  You can't use a copper chart to size PEX.  This video gives so much wrong information mixed in with the right information that I would not recommend it..

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  4. The water will go any direction due to the pressure coming from the main water supply line out in the street that he showed at the beginning of the video, somewhere on that supply line there are pumps that pump the water around to maintain pressure.

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  5. some city wont let home owners to shut the water at the meter or they will get charge for it , and the bigger de pipe just give volume of water no pressure.

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