The short answer: a linear drain sits in the shower floor along one edge and is the more flexible, lower-cost choice for most retrofits. A wall drain hides the channel behind the wall finish entirely, leaving no visible grate — the cleanest look available, at a higher cost and with more planning required at rough-in.
Both let the floor slope in a single direction, which is what makes curbless entry practical. New to linear drains? Start with our trench drain guide.
Linear Drain vs Wall Drain at a Glance
Which One Is Right for Your Project?
Choose a Linear Drain If…
- You are replacing a bathtub and working within an existing alcove
- The plumbing rough-in is already in place and you need placement flexibility
- Walls are staying closed, or the job is on a tight schedule
- Budget matters and you still want a curbless-capable result
- A tile-insert grate gives you the clean look you are after
Choose a Wall Drain If…
- You are in new construction or a gut renovation with walls open
- An uninterrupted tile floor is the point of the design
- Large-format tile is going down and you want no grate cut into it
- Nobody wants to lift a grate to clean it
- The budget supports the premium for a hidden system
One Thing Neither Drain Does
Neither type contains water on its own. A curbless entry still needs something at the threshold — a collapsible water dam, a removable threshold, or a fixed glass panel. Building to ADA standards? Thresholds are limited to ½" — see the ADA shower dimensions guide.
Linear Drain Systems
SHOWERline
The value option. Grouped by length so you order to your shower width rather than adapting a standard size, with installation support behind it. The right pick for most tub-to-shower conversions.
PROLINEdrain
Commercial-grade stainless body in long lengths. Built for high-traffic and specification work where the drain has to outlast the tile around it.
SQUAREdrain
A center-drain kit for spa-style tile showers where a four-way slope suits the design. Simpler to order, though less forgiving at a curbless entry than a linear layout.
TilePrime
Tile-ready waterproof pans, pre-sloped at the factory in standard tub-conversion sizes. Removes the hardest part of a curbless build — getting the slope right by hand.
Wall Drain Systems
A wall drain moves the channel out of the floor entirely. Water runs down a single-plane slope to a slot at the base of the wall, where the drain body sits concealed behind the tile. There is no grate underfoot, no interruption in the floor, and nothing to lift and clean.
- Completely hidden — the floor reads as one uninterrupted surface
- Single-direction slope simplifies large-format tile layout
- Well suited to curbless and ADA-style showers
- Fewer grout lines in the wet area
WallDrain by QuickDrain
The hidden-in-wall system, in lengths to suit everything from an alcove conversion to a full custom shower. Shop WallDrain
Shop by Size
Drain Selection FAQs
Is a wall drain worth the extra cost?
It depends on whether the uninterrupted floor is the point. If you are laying large-format tile and want nothing breaking the surface, a wall drain delivers something a floor grate cannot. If the shower is a functional tub replacement and a tile-insert grate would satisfy you, a linear drain gets you the same single-plane slope for less.
Can I fit a wall drain in a retrofit?
Usually only if the wall is coming open anyway. The drain body sits inside the wall cavity, so it has to be planned before finishes go on. In a bathroom where the walls are staying closed, a linear drain in the floor is the practical choice.
What length drain do I need?
The channel should span most of the shower width. A short drain in a wide shower reintroduces cross-slope, which is the problem a linear layout exists to solve. Measure the wall the drain will sit against and size to it rather than to a nominal shower dimension.
Do these drains work for a curbless shower?
Both do, and both are better suited to it than a center drain. A single-direction slope gives a predictable, flat entry height. Whether the finished shower is ADA compliant depends on the whole layout, not the drain alone.
Do I still need a pre-sloped pan?
Not necessarily, but it removes the step most likely to go wrong. Building the slope by hand at a quarter inch per foot in a single true plane is skilled work. A factory-sloped tile-ready pan arrives correct.
Not Sure Which Drain Fits Your Project?
Tell us your shower dimensions, whether the walls are open, and how the floor drains today — we will tell you which system fits and what size to order.
Get in Touch
About the Author
Jody Fisk is a licensed residential builder and accessibility specialist. Licensed in Michigan since 1991 and working in construction before that, Jody has spent more than two decades in aging-in-place and ADA-compliant design.
- President & Founder of EZ Able®
- Licensed Residential Builder, State of Michigan, since 1991
- 20+ years in accessibility and aging-in-place design
- Featured in Forbes and Michigan Builder Magazine
- Honors Scholar, B.A. Economics – University of Michigan
Jody specializes in helping homeowners, contractors, and caregivers choose the right accessibility solutions, from walk-in and curbless showers to full aging-in-place home modifications. EZ Able®'s work focuses on improving safety, independence, and long-term usability in everyday living environments.
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