![]() ![]() Obviously, both pipes were used and connected somewhere underground. It is wise to check at both ends of the pipe because we have found cases where copper pipe enters the home, and poly pipe is at the water meter. Also, you should check at the water meter that is located at the street, near the city water main. Your main shutoff valve is attached to the end of the water main. It is usually 1/2" or 1" in diameter, and it may be found entering your home through the basement wall or floor, concrete slab or coming up through your crawlspace frequently it enters the home near the water heater. Most probably, the piping was installed in about one in every four or five homes built during the years in which the pipe was manufactured.Įxterior - Polybutylene underground water mains are usually blue, but may be gray or black (do not confuse black poly with polyethelene pipe). Industry experts believe it was installed in at least 6 million homes, and some experts indicate it may have been used in as many as 10 million homes. ![]() The piping systems were used for underground water mains and as interior water distribution piping. These are typically gray or white in color with a dull finish. It is most commonly found in the "Sun Belt" where residential construction was heavy through the 1980's and early-to-mid 90's, but it is also very common in the Mid Atlantic and Northwest Pacific states. Due to the low cost of the material and ease of installation, polybutylene piping systems were viewed as "the pipe of the future" and were used as a substitute for traditional copper piping. Polybutylene is a form of plastic resin that was used extensively in the manufacture of water supply piping from 1978 until 1995. The State Plumbing Board also issues a certificate to qualified individuals who are non-plumbers to provide propane gas services throughout the entire state.Polybutylene Plumbing - What is Polybutylene? These two jurisdictions issue their own licenses and have their own plumbing code. Both of these types of licenses are required for work throughout the state except for Baltimore County and the areas served by the Washington Suburban Sanitary Commission (WSSC). The Board also issues natural gas fitter licenses to qualified individuals who are non-plumbers. The Maryland State Board of Plumbing licenses and regulates individuals who provide or assist in providing plumbing and gas services in Maryland. Please enter arrive at least 10 minutes early before your scheduled appointment time. Eutaw Street, Room 121īaltimore, MD 21201. You will receive an e-mail confirming the date and time of your appointment.Īppointments are available Monday through Friday, from 10:00 a.m. Please select the type of appointment you need from our list of available in-person services using the drop-down menu on the scheduler. Use Labor’s Central Scheduling System to meet with a representative from one of our boards or commissions. We can be reached using our contacts page for e-mail addresses and telephone numbers of individual staff members or Please note, walk-in assistance is not available. The offices of the Maryland State Board of Plumbing are open and serving our customers through our online licensing resources, via e-mail and telephone, and by limited in-person appointments. ![]()
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