![]() Then, don’t forget to convert this measurement to IPS. Second, measure the outer diameter of the pipe. If the hole is 4 inches across, look for a plate that says “4-inch hole.” There are no nominal sizes for holes in walls. ![]() You need two measurements: the size of the hole you need to cover and the size of the pipe.įirst, measure the size of the hole in the wall. Selecting a wall plate to fit around your pipe and cover the hole is easy. When selecting pipe wall plates, it pays to know the difference between IPS and actual size. Mixing up IPS and actual size will result in components that don’t fit together. ![]() That should work, right?Īgain, the actual outer diameter of a pipe is always bigger than the IPS size by roughly 10%. What would happen if you wanted to buy plumbing supplies-say, a wall plate to cover a wall penetration-but you didn’t know the difference between IPS and actual size? Maybe you measure your pipe and find that the outer diameter is 1.9 inches. If you confuse IPS and actual size, you’ll end up with wall plates that are too big! Here is a handy table of IPS sizes and outside diameters: IPS To convert between IPS and the outer diameter of a pipe, you’ll have to consult a table. It’s easier to say and remember “2 inches IPS” than “2.375 inches.” More on this later.įortunately, IPS sizes are consistent- a 2-inch IPS pipe always has an outer diameter of 2.375”. However, important innovations bought us nominal sizes like IPS, so it is used because of history and convenience. Likely, no part of a 2-inch IPS pipe has a dimension of 2 inches. The actual outside diameter of 2-inch IPS pips is 2.375 inches. In other words, a 2-inch IPS pipe is 2 inches in name only. Many people run into trouble with IPS because it’s a nominal measurement. The IPS number for a pipe or fitting is always smaller than the actual size. PVC, iron, stainless steel, and copper pipe can all be measured in IPS.īear in mind that IPS measurements are not the actual size of the pipe. IPS is a sizing system that is used for all kinds of pipe, not just iron pipe. When shopping for pipe wall plates or any other kind of pipe accessory, you might come across the acronym IPS, which stands for Iron Pipe Size. What is IPS? Understanding iron pipe size Our selection of wall plates is available in white or chrome and features a wide range of sizes bound to meet your needs. For a clean finish where pipe penetrates walls, use a properly sized wall plate. This article explains how Iron Pipe Size (IPS) measurements work, what kinds of components use them, and how to figure out the actual size of a measure given in IPS. When purchasing all kinds of pipe and fittings, including pipe wall plates, it pays to know the difference between nominal size and actual size. Most often, people end up with plates that are too big for their pipes and look just as messy as the original hole. They offer the same benefit to pipes that escutcheons do for fire sprinklers.īut things don’t look so clean or finished when the wall plate is the wrong size for the pipe. Pipe wall plates cover these holes, providing a clean, finished appearance. An oversized gap is unsightly and also usually necessary. When a pipe passes through a wall, a hole has to be cut to accommodate it. That way, your wall cover plate will perfectly match your pipe. When you do this, be sure not to get confused by the difference between nominal pipe sizes and actual pipe sizes. To get the right-sized pipe wall cover plate, match the inside diameter of the plate to the outside diameter of the pipe. When choosing pipe wall plates, don’t confuse Iron Pipe Size and actual size
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