Gateway Kitchens (1)

An Authorized Onyx Collection Dealer
Family Owned Since 1999

636-256-9300
14939 MANCHESTER ROAD
BALLWIN MO 63011

Proudly Made In Kansas, USA
Proudly Made In Kansas, USA

Standard Double & Triple Threshold

Standard Double & Triple Threshold

A typical Onyx Collection "Standard" Double Threshold Shower consists of a Double Threshold Shower Base and two Wall Panels. A ceiling panel may also be added, and we have a special High-Temperature Resin for steam showers.

All the Standard Size Shower Bases we have available are listed in this section, along with Wall Panel Kits to fit each one. For other sizes or configurations not shown in this section, see the Custom Shower Section where you will discover infinite possibilities. 

The Onyx Collection gives you a choice of more colors and textures than anyone else in the world so you don't have to settle for something you really don't want. For a distinctive look, several different Trim options are available, as well as contrasting Stripes and Borders and even Graphic Inlays to enhance the beauty and uniqueness of your shower. 

The Onyx Collection also provides a wide range of accessories including Soap Dishes, Shampoo Caddies, Towel Bars, Shower Seats, and even Foot Shelves, displayed in the Accessories Section. 

Full Height Curb

36x36-dual-curb
36 x 36
36 x 36

Low Profile Curb

48x36-dual-curb
48 x 36 left
48 x 36 left
48 x 36 right
48 x 36 right

Triple Threshold

50x36-triple-curb
49 x 36
49 x 36