Why use a linear drain?

• One slope, not four. A linear drain needs a single sloping plane. A center drain needs a cone-shaped slope.
• Steadier floor. A single-direction slope is more stable for a wheelchair and easier to walk on.
• Faster build. A single plane makes the shower floor quicker and easier to fabricate.
• More tile choices. The flat plane works with large-format tile. A tile-top strainer can make the drain nearly invisible, with water leaving through the open grout joints around it.

Side-by-side specs

	ProLine	ShowerLine	WALLdrain
Drain body	Stainless steel	PVC	In-wall channel
Lengths	26" to 68" standard; custom up to 100"	Kits sized by finished opening, 24" to 72"	26"–72" with one drain; 56"–96" with two linked
Waterproofing	Approved liquid membrane, sourced locally (since 2015)	Fabric (sheet) or liquid	Topical liquid, or sub-drainage: hot mop, copper or PVC pan liner
Strainers / tile	Six strainer styles, including tile-top	Cover included with drain body	Any wall tile thickness; floor tile up to 3/4"
Outlets	Hubless connector; centered or off-center depending on body size; custom 2- or 3-outlet bodies	Standard kits	Internally sloped so no standing water
Substrate	Wood subfloor or concrete slab; any floor surface, thin-bed or thick mortar bed	Plywood subfloor or concrete	Thin structural boards build the base

ProLine details

ProLine includes stainless drain bodies, connectors, strainers and other parts, plus accessories such as flat panel supports, Quick Slope panels and preformed curb sections. QuickDrain flat and sloping panels are a honeycomb material. They bond to plywood or concrete (and to each other) with thinset, which also fills the cells for more compressive strength. Connectors are available for multiple-drain runs.

Before 2015, ProLine drains came with membrane flashing bonded to the flange for use with a fabric membrane. ProLine drains are now used only with an approved liquid membrane that the installer buys locally.

Where to put the drain in a curbless shower

1. At the entry (most common). Run the drain along the transition from the bathroom into the shower. The slope can then be built directly on the subfloor.
2. At the back wall. Possible with the right construction. WALLdrain is designed for this.
3. Never along a side wall. A drain on the left or right of a curbless shower creates a trip hazard and does not allow a curbless entry.

In a curbed shower, the drain can go against the curb or along any wall. For best results, every linear drain should run the full length of the shower wall. Two or more drains can be joined for a long run or an L-shape along two walls that meet in a corner.

Example: same tub-to-shower space, curbed vs curbless

60" x 30–32" space	Curbed shower	Curbless shower
Drain location	At the shortest wall (30–36" drain), left or right	Along the full entry threshold (58–60" drain)
ShowerLine drain body | cover	PVC2432 | 32	PVC5664 | 64
ShowerLine pan	SLPAN32	SLPANADA64
Waterproofing	SLSWP32	SLSWP-ADA

Installation videos: ProLine installation videos, ShowerLine installation videos and the WALLdrain installation video.

Common questions

What is the difference between ProLine and ShowerLine?

ProLine has a stainless steel drain body with more lengths, strainer styles and outlet options. ShowerLine has a PVC body and a simpler, kit-based order.

Can a curbless shower have the linear drain at the back wall?

Yes, with the right construction. WALLdrain uses thin structural boards so the drain can sit at the wall in a curbless shower.

Can I put a linear drain on the side wall of a curbless shower?

No. A side-wall drain creates a trip hazard and does not allow a curbless entry. Place it at the entry or the back wall.

What waterproofing does ProLine use?

An approved liquid waterproofing membrane that the installer sources locally.

Related help

• ShowerLine drain sizing chart
• ShowerLine vs ProLine: which should I choose?
• 4 linear drain installation tips
• Shop linear shower drains
• WALLdrain by QuickDrain
• Linear vs wall drain: which is best?