A 2 sink bathroom vanity looks simple from the front, but its plumbing is doubled behind the doors. Each basin needs its own drain path and its own pair of water supplies, so the rough-in work takes more planning than a single sink does. This guide walks through what two basins mean for drains, supplies and wall space, using the three double sink models sold at Veil. It also names the one number no listing gives you, because that number decides where the pipes go. You can see the models themselves in the double sink bathroom vanity collection at Veil.
Two of Everything
With one sink, the plumbing list is short. With two, almost every part doubles. In most homes, each basin gets its own short drain arm that joins a shared run inside the wall, but some layouts give each basin a fuller path of its own. A plumber will usually decide which route suits your wall, because the wall space and the existing pipes set the limits. The supplies double too, so each basin needs its own hot and cold connection, plus its own set of shut-off valves. You also plan for two faucets and two drain assemblies, one set per basin, because a double top is really two wash spots sharing one cabinet.
The three Veil models split on one point here. The Maranon, a 60 in floating model with a trough-style top, includes its drain, and its drains sit concealed inside the top. The Cambridge and the Stafford do not state whether a drain comes in the box, so check the product page before you assume one is included. All three listings state that faucets are not included, though, so two faucets always sit on your own list.
Basin Spacing on a 2 Sink Bathroom Vanity: the Number the Listings Do Not Give
Basin spacing is the distance from the center of one basin to the center of the other, and it decides where each drain and supply pair lands on the wall. Here is the honest gap: not one of the three Veil listings states that distance. The Cambridge tops run 61, 67 and 73 in wide, the Stafford top is 84 in wide, and the Maranon top is 60 in wide, but a top width alone cannot tell you where the basins sit on it. Guides to double vanity sinks for bathrooms often skip this number, because it changes from model to model. So the spacing has to come from the model's drawing or spec sheet, and your plumber needs that sheet before the wall closes. Once the wall is shut, moving a drain point means opening it up again. If the drawing is not to hand yet, you can also measure from the actual top when it arrives, because the basins are fixed in it and their centers are easy to mark.
Rough-In Order
The order of the work matters as much as the measurements. First, confirm the finished wall length, because these tops need real room: 61 to 73 in for the Cambridge, 84 in for the Stafford and 60 in for the Maranon. Next, mark the stud positions, since pipes and valves have to sit between the studs or pass through them. Then set the drain and supply positions from the model's drawing, matching each basin center on paper to a point on the wall. Only after those points are checked should the wall be closed. Confirm the details with your local building code. Codes set venting and trap rules that change from place to place, so a layout that passes in one town may need changes in another.
When Not to Start
Do not rough in from a photo or a guess. A photo shows the front of a 2 sink bathroom vanity, but it hides the basin centers, and those centers are the whole job. If the drawing or spec sheet for your model is missing, the honest move is to wait, even when the rest of the room is ready. A drain set even a little off can leave a basin draining poorly, and fixing it after tiling costs far more than a short delay. So hold the wall open until the numbers come from the sheet, or from the top itself.
Related guides
Questions
In many homes, yes. Each basin usually keeps its own trap and a short drain arm, and the two arms join one shared run inside the wall. But venting and trap rules change from area to area, and some layouts need more separation than others. So treat sharing as the common route, not a promise, and check the plan with your plumber and your local building code.
Yes. The Maranon listing states that its drain is included, and the drains sit concealed inside its solid surface trough top. The same listing states there is no overflow, which matters if you ever pick spare parts for it later. The Cambridge and the Stafford listings do not say whether a drain is included, so check the product page for those two before you order.
Two things. First, the finished wall length, because the tops here run from 60 to 84 in wide. Second, the basin centers for your model, taken from its drawing or spec sheet, because no listing states the distance between the basins. With those two numbers, your plumber can set each drain and supply point before the wall shuts.
