I am not a plumber, but I am familiar with oxidation.  Many simple plumbing valves only need to be removed and new "O" rings installed.  That's where the problem comes in.  Most older homes used metal pipes and not PVC.  Usually the valve screws into a different type of metal and oxidation occurs between the two metals, almost becoming one.  In order to get the valve stem out you have to break it loose.  If you break the pipe, not only do you have a mess but then you have to pay to fix it.  Simple if you break it you pay.  If a plumber breaks it, he is responsible.  I recommend paying the plumbers fee and save yourselves headaches in the long run. 
If you have a major fix in your home, it’s important to shop around for a plumber to do the work. At least three bids will help you determine the range of the project, so you can weigh the pros and cons of price and the reputation of the plumbers. Get references and contact them. Also, a good plumber isn’t likely to nickel and dime you. For the smaller jobs, check out these 11 plumbing tricks.
Called Atomic plumbing after kitchen was flooded with water the evening before, was given a time a technician would be out. Technician Jimmy Powell showed up early and after checking problem He went right to work. He stated he would have to cut a hole in the ceiling to get to the the drain. After some careful measurements his cut was right on target. Jimmy fixed the problem and was a true professional from start to finish. I wouldn't hesitate to call Atomic Plumbing for any plumbing needs, and would highly recommend Jimmy Powell as the technician.
The difference between pipes and tubes is simply in the way it is sized. PVC pipe for plumbing applications and galvanized steel pipe for instance, are measured in IPS (iron pipe size). Copper tube, CPVC, PeX and other tubing is measured nominally, which is basically an average diameter. These sizing schemes allow for universal adaptation of transitional fittings. For instance, 1/2" PeX tubing is the same size as 1/2" copper tubing. 1/2" PVC on the other hand is not the same size as 1/2" tubing, and therefore requires either a threaded male or female adapter to connect them. When used in agricultural irrigation, the singular form "pipe" is often used as a plural.[19] 

When you’re searching for a dependable Dallas plumber or Dallas plumbing company “near me” which offers licensed and trained plumbers for any plumbing repair or plumbing installation like water heaters, tankless heaters, garbage disposals, drain or sewer lines, water filtration, water softening or other plumbing needs, call 214-892-2225214-892-2225.
The Home Depot has a wide selection of high-quality plumbing parts including sump pumps, water heaters, HVAC systems, pipes and much more. The Home Depot even has eco-friendly plumbing options to help you save money and live green. If you need professional advice or installation assistance with any of your plumbing projects, turn to The Home Depot to help you finish your plumbing project. 
Wall thickness does not affect pipe or tubing size.[20] 1/2" L copper has the same outer diameter as 1/2" K or M copper. The same applies to pipe schedules. As a result, a slight increase in pressure losses is realized due to a decrease in flowpath as wall thickness is increased. In other words, 1 foot of 1/2" L copper has slightly less volume than 1 foot of 1/2 M copper.[citation needed]
Menards® has everything you need for your plumbing supplies. Update your plumbing with our selection of pipe, tubing, hoses, fittings, and accessories. We offer pipe, hoses and tubing, and fittings in different sizes for all applications. Install new plumbing features or make necessary repairs with our plumbing installation and repair products. We offer a variety of tools for faucet repair, including aerators, O-rings, and washers. Use our selection of pipe cements, cleaners, and primers to maintain your plumbing. Make other repairs with our soldering compounds and accessories. Hydronic radiant heat systems use hot water to heat your home and keep you comfortable all year long. We offer a variety of sewage basins and septic tanks to fit your home as well as valves for many different applications. Our plumbing access panels are durable and dependable. Menards® offers everything you need to update your sink or tub with our selection of utility sinks and accessories and tub drains, overflows, and accessories. We also offer a wide selection of refrigeration line sets.

PVC/CPVC – rigid plastic pipes similar to PVC drain pipes but with thicker walls to deal with municipal water pressure, introduced around 1970. PVC stands for polyvinyl chloride, and it has become a common replacement for metal piping. PVC should be used only for cold water, or for venting. CPVC can be used for hot and cold potable water supply. Connections are made with primers and solvent cements as required by code.[22]
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In 2015, Homesense Heating and Cooling acquired the building and spent more than $1 million to redevelop it into Refinery 46, a co-working space for home service providers such as electricians and plumbers. — Liz Biro, Indianapolis Star, "Double 8 grocery stores: Here's what they are now," 1 May 2018 Much like how plumbers, electricians, and other tradesmen install and service other equipment in a home. — Tom Warren, The Verge, "Former Alexa smart home chief and Windows Media Center founder joins Control4," 2 Aug. 2018 And those who live and work here had the same problems, along with closed schools, canceled surgeries at hospitals and long wait times to schedule plumbers. — Jennifer Larino, NOLA.com, "Spirit adding nonstop flight from New Orleans to Atlantic City in April," 19 Jan. 2018 Robots won’t eat all the jobs, says Marco Zappacosta, the CEO and co-founder of Thumbtack, a marketplace for service professionals from plumbers to yoga teachers to personal trainers. — Carolyn Said, SFChronicle.com, "Why the robot apocalypse won’t kill all gig economy jobs," 16 June 2018 Most people will accept spending $80/hour on a plumber, but balk at putting a similar price tag on the value of their company’s website. — Jenny Knizner, USA TODAY, "Fundamentals of hiring a freelance designer for your business," 19 Mar. 2018 Then a team of plumbers begins restarting the system around St. Patrick’s Day, with the aim of having all outdoor water features back up and running by Memorial Day weekend. — Keith Williams, New York Times, "It’s Hot. How Do I Get the Spray Shower at the Park to Work?," 19 June 2018 The full-time employees losing their jobs include electricians, plumbers, carpenters and other skilled tradespeople needed to operate and maintain a large events venue. — James B. Nelson, Milwaukee Journal Sentinel, "Many long-time Bradley Center workers will not have jobs at the new Bucks arena," 11 May 2018 There are female plumbers, taxi-drivers and bartenders. — The Economist, "How a victorious Bashar al-Assad is changing Syria," 28 June 2018
While it’s their job to make sure your pipes work like a well-oiled machine, it’s not their job to rebuild the wall they had to demolish to make that happen. So, while you’re going to get that water problem fixed, you’ll want to discuss in detail what kind of “mess” they might leave behind prior to the start of the project so you can plan accordingly. Remember, there are some jobs you can do yourself. Here’s how to solder copper pipe joints!
The difference between pipes and tubes is simply in the way it is sized. PVC pipe for plumbing applications and galvanized steel pipe for instance, are measured in IPS (iron pipe size). Copper tube, CPVC, PeX and other tubing is measured nominally, which is basically an average diameter. These sizing schemes allow for universal adaptation of transitional fittings. For instance, 1/2" PeX tubing is the same size as 1/2" copper tubing. 1/2" PVC on the other hand is not the same size as 1/2" tubing, and therefore requires either a threaded male or female adapter to connect them. When used in agricultural irrigation, the singular form "pipe" is often used as a plural.[19]
Much of the plumbing work in populated areas is regulated by government or quasi-government agencies due to the direct impact on the public's health, safety, and welfare. Plumbing installation and repair work on residences and other buildings generally must be done according to plumbing and building codes to protect the inhabitants of the buildings and to ensure safe, quality construction to future buyers. If permits are required for work, plumbing contractors typically secure them from the authorities on behalf of home or building owners.[citation needed]
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