The materials used for underground piping and tubing are subject to strict limitations.

The materials used for underground piping and tubing are subject to strict limitations. Black iron pipe will be installed in my basement for a dryer, stove and possible future house heater and water heater. Galvanized steel is used in some areas as well. The piping upstream of the gas meter and the meter itself usually are the responsibility of the gas company. Steel, copper, brass: The most common gas piping is black steel.

Copper tubing is not an approved underground piping material in some states.

Carbon steel and wrought-iron pipe shall be at least of standard weight and shall comply with one of the following standards:1.ASME B36.10, 10M2.ASTM A 53/A53M; or3.ASTM A 106.403.4.3 Copper and brass.

Don’t use pipe dope on these connections, as it can deteriorate the plastic. First, select a 2-inch ABS fitting with a male thread on one end and a female slip joint on the other, and screw the fitting into the existing steel pipe.

plastic pipe to copper or steel pipe Making the connection between plastic pipes such as ABS or PVC and metal pipes such as copper or galvanized steel is very straightforward. We have oil heat now. Also, piping materials such as steel must be protected by sleeving or taping the service line or corrosion will begin to damage the piping (pictured here).

If you’ve browsed through the plumbing section at the home center, you no doubt noticed that there are threaded copper pipe fittings that you can solder right onto the end of the pipe, and they will screw directly onto older threaded galvanized water lines. You should know what is acceptable in your area. Luckily for all of us, these transitions are common enough that there are a number of fittings on the market that make dissimilar pipe connections quick, easy and safe. Flex connectors: Flexible connectors are permitted to connect appliances to the gas piping. The inadvertent movement of the gas service line can cause leaks to form at the connections on either end of the line. Transition fittings are also commonly available to adapt ABS pipe to cast iron. Flexible connectors may not be permitted on gas furnaces, water heaters, space heaters, etc. The propane yard line generally consists of copper tubing or plastic polyethylene piping.

We will discuss some of the basics of inspecting gas piping. Propane gas lines running along the top of the ground (pictured here) constitute illegal installations. Three- or six-foot long and accessible: The flexible connectors can’t go through walls, floors or ceilings, nor can they be concealed. The fittings cost under $10, and not only is the transition easier to accomplish, but it also leaves you with a joint in the line that can be disassembled later if you need to perform other work on the lines.

In some jurisdictions, flexible connectors are allowed only for gas ranges, dryers, outdoor barbecues and other semi-portable appliances. The problem is that the zinc used for galvanizing the threaded water pipes doesn’t get along very well with the copper. This valve has to be in the same room as the appliance.

Branch lines run to individual appliances. These material requirements are in place because of the unfriendly underground environment the pipe and tubing will be exposed to.

E-mail Paul at paulbianchina@inman.com. This eventually causes pipe degradation and leakage. Galvanized steel, copper, brass or CSST (Corrugated Stainless Steel Tubing) also can be used in some areas, but some utilities specifically prohibit the use of copper. Cast-iron pipe shall not be used. The dielectric union has a threaded steel female fitting on one end, which is threaded onto the steel pipe.

If you make a direct connection, these two materials will interact in a chemical reaction that will corrode the joint and eventually cause it to start leaking. Similarly, a line running on the surface of the ground can easily be damaged by accidentally tripping over it. Additional protective measures must be taken in certain cases like placing the gas line in a PVC sleeve or wrapping it with a protective tape.

There has to be a shut-off valve at the connection to the rigid piping.

Often, this is done by attaching the gas piping to the supply water piping (assuming it is grounded) frequently near the water heater. Called a band clamp, the fitting is simply a thick rubber tube with a screw clamp on each end. For these appliances, 6 feet generally is allowed. The photos here depict copper tubing installed underground in a state where copper tubing is approved for underground yard line installations. If you have poor soil drainage, use only copper.

Simply determine the type and size of the pipes you’re trying to connect, and your dealer can help you select the best type of fitting for the job.

In some areas, yellow thread seal tape is allowed. Author: hj (AZ) The original reason was that the gas composition caused the galvanizing to flake off and plug the orifices. These are just a few examples of the hundreds of transition fittings that are available.

This program is extensive, detailed and the instructors are always there to help you out if you need it.”, Learn more about Carson Dunlop’s home inspection training program. Bonding the gas piping to the electrical grounding system is a requirement, however, in many jurisdictions. Steel piping typically is black with malleable iron or steel fittings.

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It might be a transition from threaded galvanized water pipes to copper pipes, or from old cast-iron sewer lines to today’s ABS. The fittings are readily available in home centers, hardware stores and plumbing supply retailers. Like underground propane tanks, buried piping and tubing must be made of a material that will resist harsh underground conditions. Splicing or joining connectors with nipples often is prohibited. Since brass doesn’t react with either the copper or the zinc, one method is to make sure you have a threaded female end on both the copper and the steel pipes, and then connect the two by simply inserting a short threaded brass nipple between them. Here, galvanized is required outdoors above ground. A copper line running under a dirt drive that is buried just a few inches underground can be easily crimped or crushed by the weight of a vehicle.

Plastic pipe fittings are available as either threaded (both male and female threads are available) or slip (non-threaded for making glue joints). The gas line that runs between the tank and the structure housing the gas appliances is the service piping, also known as the yard line. In other areas, the use of copper is widespread.

To contact the writer, click the byline at the top of the story. All of these measures are for the protection against loss of propane.

The connection between plastic and metal is simply a matter of choosing a threaded fitting of the proper size and configuration to make the transition. For example, suppose you’re installing a new sink and you want to use a 1 1/2-inch ABS trap connected to the 2-inch female-threaded steel pipe that’s currently in the wall. Underground there are … Running black iron pipe for propane use might seem like a daunting task, and you will pay a professional dearly to get the job done. You may want to check with the gas utility.

Like underground propane tanks, buried piping and tubing must be made of a material that will resist harsh underground conditions. A 16" main consisting of 3/4" galvanized pipe will enter through my masonry block. The service piping needs to be installed correctly and legally in conjunction with the propane tank for the entire outside portion of the installation to be safe and serviceable. Remember that copper pipe will need to have a threaded male or female fitting soldered onto the end first.

Thank you for subscribing to Morning Headlines. Most gas no longer has that problem.

I perceive that this Carson Dunlop Course is at the top of the hill and raising the bar in the home inspection profession.

The chemicals used in the manufacture of any of these pipes do not react with one another, so you don’t have the corrosion factor to worry about. We also have listed ten conditions that are typical when there are problems with gas piping.

The second method is to use a special transition fitting called a dielectric union. I did a lot of research on courses and yours has them all beat.”, “It truly showed me what a home inspection should be, and to deliver above and beyond the provincial standards.

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