What is an MJ coupling?
What is an MJ coupling?
The Mechanical Joint (MJ) Coupled Joint offers a method of providing joint restraint with a standard mechanical joint socket of a pipe, fitting, valve or other product. The joint material consists of a standard mechanical joint gasket and a standard ductile iron joint gland. …
What is an MJ tee?
MJ stands for Mechanical Joint. It is a type of compression joint designed for underground connection for pipe, valves and fittings. The components are comprised of a mechanical joint bell on the pipe, valve or fitting, and a mechanical joint gland, gasket and set of tee-head bolts and nuts which are supplied loose.
What is a hydrant tee?
barbed brass hydrant tee allows multiple flexible poly pipe lines to be connected to the hydrant. This piece makes hydrant connection quick and easy. The hydrant tee meets all federal low lead regulations.
Are MJ fittings restrained?
The restraint is a split serrated ring with thrust rods that rod back to the fitting. The Restraint is rated for the full pressure of C900 PVC pipe. Available in sizes 4 inch through 12 inch.
Is a flange a mechanical joint?
The mechanical joint is based on the stuffing box principle and consists of a bell with an integrally cast flange, a cast or ductile iron gland, a rubber gasket and the necessary bolts and nuts.
What does MJ stand for in plumbing?
The standard defines “mechanical joint” as: “a joint in which a positive seal is achieved when a gasket is compressed by means of a mechanical device.” A mechanical-joint (MJ) connection is the most common method used to join PVC pipe to a valve or an iron fitting.
What is an MJ sleeve?
Ductile Iron Mechanical. Joint Tapping Sleeve. Ductile Iron MJ Tapping Sleeves are lighter and stronger than traditional cast iron sleeves and are used in conjunction with MJ Tapping Valves where a connection to an existing main is required.
How deep are fire hydrants?
3 Set not less than 3 feet (914 mm) deep in a concrete footing of not less than a 15-inch (381 mm) diameter.
How deep is a fire hydrant water line?
Pipe shall be buried at least 36 inches where subject to loading (e.g., driveways, parking lots) and at least 30 inches elsewhere. 13. All pipe shall be approved for use in fire service systems. Class 150 will be used at a minimum, and class 200 pipe shall be used where the water pressure exceeds 150 psi.
