1/4/2024 0 Comments Wet vent plumbing diagramOnce you've decided on the basic layout and have a general idea of how the drain and vents will run, make specific bathroom plans. While exploring layout options, maintain these clearances in your plan to ensure ease of use and installation. Minimum ClearancesĪ bathroom with a 5x8-foot interior space allows the minimum clearances that most municipal codes require for fixtures. Run 3/4-inch pipe to the bathroom for maximum water pressure and use 1/2-inch for short runs only. Bathrooms are usually supplied with 1/2-inch pipe. Rigid copper pipe is the most common material for water-supply lines, but PEX or other plastic materials may be permitted in your area. (You can reduce the noise of water draining through PVC by wrapping the pipe with insulation.) However, cast-iron pipe should be installed by a pro. Local codes may call for a 4-inch main drain, and some plumbers prefer to run larger vent pipes.Ĭast-iron drainpipe is coming back in some areas because it's quieter than plastic pipe. These plans call for a 3-inch-diameter PVC pipe for the main drain and the short length leading from the toilet to the drain, and a 2-inch PVC for the other drain lines and the vents. The framing must be almost perfectly square. If the opening is any smaller, the tub will not fit if the opening is more than 1/4 inch too long, making a tight seal along the wall will be difficult. The framed opening-not the finished wall-must be 60 inches long to accommodate a standard tub. If your plans call for a larger tub, alter the layout to fit it. A standard bathtub is 60 inches long by 32 inches wide. Sinks and vanity sink tops range from 20 to 30 inches in width. There must be at least 24 inches in front of the toilet, but it's OK for a door to swing into this space. Most codes require no fixture being closer than 15 inches from a toilet's centerline. The following pages show the bathroom plumbing diagram and how to install a basic 5x8-foot bathroom-just enough room for the three major fixtures with adequate space between them. Plan for a layout that's comfortable and convenient. Minimize long horizontal runs of drain and vent pipes by installing fixtures on or close to the wet wall. For example, most homes will have a "wet wall," an interior wall thicker than most walls because it contains water lines and the main stack. Placement of the toilet, sink, and tub may depend partly on the existing plumbing. The specs shown here will meet the requirements of most building departments, but check local codes to be sure. Specifications for the placement of plumbing fixtures and the dimensions of pipes are intended to make the bathroom a comfortable space with plenty of capacity for incoming water and outgoing drains and vents. Before deciding on a shower head, a few more critical decisions must be made in a bathroom remodel.
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