Small RV Bathroom Sink Options and Sizing Guide | Fit It Right The First Time

Most compact RV bathroom sinks run 10 to 19.5 inches wide, and the model that fits is decided by cutout size, lip width, bowl depth, and drain diameter — not by the sink’s exterior dimensions.

Buying a replacement sink off looks alone is how a bathroom remodel turns into a return shipment. Cutout dimensions decide what physically drops into your countertop, and a sink that misses by a quarter inch will not seat no matter how good the spec sheet reads.

RecPro’s current lineup covers most compact footprints, from a 10″ x 13″ oval white sink up to a 19-1/2″ x 16-1/2″ oval, plus a 17″ x 12″ stainless-steel oval and a 16″ x 14″ oval with a 13-3/4″ bowl. Sizes cluster where small RVs need them. Fit is where they diverge.

What Sizes Do Small RV Bathroom Sinks Come In?

Compact RV lavatory sinks generally fall between 10 and 19.5 inches wide, with a handful of standard footprints covering the majority of small bathrooms.

RecPro’s catalog shows the range clearly: a 10″ x 13″ oval white sink with stopper, a 12″ round bathroom RV sink, a square RV sink at 14-3/4″ x 12-1/4″ x 6″ (currently listed at $41.95), a 15″ x 13″ composite bar sink, the 16″ x 14″ and 17″ x 12″ ovals, and a 19-1/2″ x 16-1/2″ oval. Retail guidance commonly points shoppers toward footprints under about 14 inches wide for tight spaces — but that’s a starting filter, not a guarantee.

Duo Form Plastics’ Duo Flip Sink Basin takes a different route: 13.25″ wide by 20″ tall with a 1.5″ drain, designed to flip between sink and counter space.

How To Measure For A Drop-In RV Sink

Measure three things on your existing sink: outside lip left-to-right, outside lip front-to-back, and bowl depth from the deepest point down to the countertop plane. Those three numbers are what you match to a replacement.

Then check what the numbers don’t tell you. The RecPro 16″ x 14″ oval illustrates why.

Counter depth matters as much as width. Open the cabinet doors and pull the drawers before you commit, because a deeper bowl can collide with plumbing or hardware that looked clear from above.

Drain, Faucet, And Cutout Traps

Drain openings are not standardized across small RV sinks, and that’s the single most common surprise. Verified diameters in the current RecPro range include 1-1/2″, 1-5/8″ (non-threaded), 1.75″, 1.97″, and 2″ — and at least one sink excludes both the faucet and pop-up drain.

Before ordering, confirm three things: the drain diameter matches your existing plumbing, the drain threading matches, and the faucet is included if the listing doesn’t say so. Faucet clearance over the bowl rim is worth eyeballing too, since a taller faucet over a shallow bowl splashes more than you’d expect.

If you’d rather compare tested options side by side before measuring, our roundup of the best bathroom sink for a motorhome covers models that already fit common RV cutouts.

Installation And Daily Care

The install sequence for a drop-in RV sink is short: confirm the package, cut to template, set, secure, connect, and test. The Better Bath RV sink installation manual from LCI walks through that order.

1. Verify everything in the box — faucet, cut-out template, mounting hardware, drain pipe, and strainer if listed.
2. Mark and cut the countertop opening using the supplied template.
3. Place the sink into the opening and fasten it with the mounting hardware.
4. Connect the faucet and water lines with sealed joints.
5. Install the drain pipe and strainer, then run water and check every joint for leaks.

After it’s in, the manual’s daily-use guidance is blunt: use the sink cover or cutting board for extra workspace, and keep heavy impacts off the stainless surface. A dropped wrench dents a thin RV bowl faster than you’d guess.

One gate worth naming — if your cutout measures between two standard sizes and nothing in the RecPro range fits, a bar sink or a custom-cut countertop insert usually solves it. Measure and search by cutout dimensions rather than by exterior size, and you’ll skip the return.