Mass state plumbing code

What plumbing code does Massachusetts use?

Review 248 CMR 10.00: Uniform State Plumbing Code .

Can PVC pipe be used in commercial buildings in Massachusetts?

Limited use of PVC for Commercial Buildings . PVC pipe and fittings may be installed for limited purposes in commercial buildings or establishments, provided that the following requirements are satisfied.

Is PEX legal in Massachusetts?

Massachusetts has no consistency in plastic pipe limitations. CPVC can be used for water piping in residential buildings up to six stories in height. However, PEX only can be used in residential buildings up to three stories. So, if you are in Podunk, Mass., working on a strip mall, plastic pipe cannot be used.

Are air admittance valves legal in Massachusetts?

Air Admittance Valves are not permitted, except with Special-permission from the Board. 2. An individual vent, branch vent, wet vent, circuit vent, vent stack, or stack vent shall be permitted to terminate with a connection to an air admittance valve .

How deep are sewer lines buried in Massachusetts?

12 inches

Can you use PVC in commercial buildings?

Polyvinyl chloride ( PVC ) pipes are commonly used in both residential and commercial applications. This material can react poorly to extended exposure to heat or to ultraviolet light, which restricts its use primarily to indoor applications and drainage applications.

Can I do my own plumbing in Massachusetts?

Licensed Plumbers Only a master or journeyman plumber examined and licensed by the Board of State Examiners of Plumbers and Gas Fitters, with the proper permits issued by the local plumbing inspector, can perform plumbing work at your home or business.

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Why is PEX banned in California?

It was banned by California’s Building Standards Commission because there was a concern that some chemicals may leak from the pipe into the water. So, the authorities of California banned the PEX thinking that it may cause unnecessary exposure to chemicals or carcinogens which may lead to dangerous effects.

What does DWV stand for?


How does the drainage system work?

The drain system within your home works entirely by gravity, allowing wastewater to flow downhill through a series of large diameter pipes. All wastewater flows to the main waste and vent stack. The main stack curves to become a sewer line that exits the house near the foundation.

How many fixture units is 2 drain?

710.1 Maximum Fixture Unit Load

2 6 24
21/2 12 42
3 20 72
4 160 500

Can a toilet shower and sink share a vent?

As a general rule, you will just be able to vent 2 fixtures on a toilet wet vent . 1) Toilet and Sink : The toilet is vented through the sink drain. The toilet drain should be 3″, the sink drain is 1.5″, the shared sink drain/ toilet vent area should be 2″, and the vent going up should be 1.5″.

How many plumbing vents can be tied together?

If it rises to the level of the connection and proceeds horizontally from there, you use a vent tee, which doesn’t have a sweep. You can usually tie up to eight fixtures to a single stack, but local codes differ, so it’s a good idea to check.

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How many fixture units can a 2 inch vent handle?

Drainage and venting fixture unit values

Individual fixtures Minimum size trap and trap arm b Number of units
Clothes, washer, domestic, 2-inch standpipe 2 inch 3.0
Dishwasher, domestic, with independent drain 1-1/2 inch a 2.0
Kitchen sink, domestic, with or without food waste grinder and/or dishwasher 1-1/2 inch a 2.0