Model # K-45212-BN

Internet #203384151

Store SO SKU #1001090374

KOHLER HydroRail 21-3/4 in. H Shower Column in Brushed Nickel


HydroRail 21-3/4 in. H Shower Column in Brushed Nickel

$42735 /each

Choose Your Options

Vibrant Brushed Nickel
  • Oil-Rubbed Bronze
  • Polished Chrome
  • Vibrant Brushed Bronze
  • Vibrant Brushed Nickel
  • Vibrant Polished Nickel
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Frequently Bought Together

Product Overview

HydroRail-R allows you to easily upgrade a standard shower to a spa-like showering experience with luxurious overhead rain and hand shower functionality. It’s designed to accommodate a wide array of shower configurations without altering in-wall plumbing, making it suitable for both remodels and new construction. This shower column converts your single-outlet showerhead into a two-outlet custom showering experience, and has a slide bar bracket for easy height and angle adjustments to your hand shower. For smooth toggling between hand shower and rain head functions, this column features a diverter conveniently located at the base.

  • Column lets you customize your shower with a rain head and hand shower
  • For use in shower-only installations with beam shower arm for reduced ceiling height
  • Patent-pending technology allows for an easy shower installation
  • Slide-bar bracket allows you to adjust height and angle of hand shower
  • Diverter at the base of the column makes for easy toggling between hand shower and rain head
  • Includes column/slidebar and hand shower bracket
  • Includes an adapter that will fit with most installations but may require K-1194630, K-1187917, or K-1194302, refer to the specification sheet for more information
  • Rainhead, hand shower, and hose sold separately to allow for customized decor

    KOHLER HydroRail Before and After

Info & Guides

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Product Depth (in.)
Product Height (in.)
Product Width (in.)


Color Family
Vibrant Brushed Nickel
Escutcheon Included
Mount Type
Wall Mount
Plumbing Part Type
Shower Arm
Shower Arm Style
Shower head Included

Warranty / Certifications

Manufacturer Warranty
Kohler Lifetime Limited Warranty

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Customer Questions & Answers

can hydrorail shower system be coordinated with or integrated to tub faucet system

I have a showerhead and bathtub operated by the same faucet system. Can I install shower system and still retain a tub faucet system.
Asked by: Elspeth
Yes, this model does have a diverter to be able to retain other functions.
Answered by: CommunityAnswer
Date published: 2016-04-01

size of the flanges

Could you please tell me the diameter of the flanges?
Asked by: RH
The flanges are 3 inches in diameter.
Answered by: CommunityAnswer
Date published: 2016-02-05

Can i use the 2973 -ks valve and a stacked volume/temp control with this?

2973 or 2976 valve with K-T10422 stack valve trim precisely.
Asked by: dnev220
Hi, this is Laura with Kohler Co. I am happy to assist you with your question. The 2973 is a thermostatic valve is a stacked volume/temperature control valve; they would not be used together. Please call our Customer Care Center at 1-800-4KOHLER (1-800-456-4537) for assisting with determining your valve set up. Thank you for choosing KOHLER.
Answered by: Kohler Product Expert
Date published: 2017-05-03


Asked by: DEMON
Hi, this is Laura with Kohler Co. I am happy to assist you with your question. Please call our Customer Care Center at 1-800-4KOHLER (1-800-456-4537) for assistance with replacing a diverter cartridge. Thank you for choosing The Bold Look of KOHLER.
Answered by: Kohler Product Expert
Date published: 2017-01-14
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Customer Reviews

HydroRail 21-3/4 in. H Shower Column in Brushed Nickel is rated 4.6 out of 5 by 12.
Rated 4 out of 5 by from Excellent retrofit if you need a handheld showerhead and adjustable shower bar This shower rail retrofit kit is one of the nicest Kohler bathroom upgrades made and will play nicely with other manufacturers of shower faucets such as Grohe. We recently completed our basement bathroom and this will be a perfect addition to retrofitting our Grohe tub/shower faucet to now include a hand showerhead. The polished chrome finish blends in nicely with our Grohe 19822 fixture and also adds a added handhold on the shower bar. Because it has the Kohler name you can rest assured it will be adequately supported with replacement parts years down the road. I do wish I had this in my possession "during" our bathroom renovation as I would have been able to properly install additional 2x4 wood bracing prior to the durock install. While it appears to be securely anchored to the wall I am reluctant to use the shower arm as a handhold and would definitely NOT put my full body weight to the shower beam. Be sure and have both a showerhead and especially the handheld showerhead before installation as you will need them to complete this upgrade.
Date published: 2015-11-12
Rated 5 out of 5 by from Housewife Love the height and looks very good. Rain shower head is perfect on it and separate spray works well and good water flow!
Date published: 2016-10-12
Rated 5 out of 5 by from This is a great compromise The hydrorail column is sleek and modern but also a perfect solution for folks like us who use both a rain shower head and a hand held in their shower. For me being only 5'2" its not easy reaching the diverter valve - it sure seems like its on a sky hook! And, even if I can reach it, the diverter valve is not easy to reach. But now I can enjoy both. Also it makes it easy for the grandkids to switch between the rain shower head or the hand held. The chrome finish is thick and rich and the diverter is smooth and easy to move. Now I can enjoy the gentle rain shower and in the same shower session easily switch to the hand held to rinse shampoo out of my hair. Love it.
Date published: 2015-08-23
Rated 4 out of 5 by from Nice Upgrade We have a rain shower head that is 8 inches in diameter, it was sitting slanted against the existing mounting about 6 inches away from the wall. Although it didn't seem to be a big deal when showered under this option, after installing this hydrorail shower column, the experience is a much better water flow over the top of the head like standing under the rain. It's high enough for my 6 feet tall husband to be completely under the shower head. The shower arm extended far enough to comfortably be under the water and not to close to the wall. The installation was pretty simple. We watched the video provided with the product before installing and it went quite smooth.
Date published: 2016-04-19
Rated 4 out of 5 by from Great shower bar This was a new installation for me, of this type. This installation was easy for me. I do have some experience at these things, so it may vary for other people. The appearance of this unit, is bright and shiney, yet clean in design. It's quite functional, and feels well made. It ads an updated sophistication to a basic shower, which I do like. I fitted this with a square rain can type shower head, and I am happy with it. I did get some compliments on it. Overall, if you are looking for a modern style, and good functionality, this fits the bill. I recommend it.
Date published: 2016-03-30
Rated 4 out of 5 by from Decrative and Functional Dual Shower Option If you want both a fixed shower head like a rain model in addition to a hand wand, then this is one of the classiest options on the market. However, if your spouse does not like holes put in the wall, then you may be in for a fight if this is an upgrade instead of a new install. I finally convinced her to let me drill a few holes for the mounting points, but it was stressful not knowing if I would accidentally drill into an existing water line. This would have been child's play on a new install, but an upgrade to an existing shower may be too much risk. The only issue I really had was the installation Allen key was missing for one of the fittings and I again worried that I would screw up the installation. Looks great, but installation is much more difficult than a standard shower head.
Date published: 2016-03-26
Rated 5 out of 5 by from HydroRail Shower Column in Polished Chrome for Beam Shower Arms Now that is what I needed to finish off the bathroom show. A Must have for a high end shower, I added 2 just for that extra water flow and make it more flexible after a long day of yard work to relax and have an extra stream of water to sooth aching bones and joints.. it was a breeze to install and make your show look like it belongs in a multi million dollar home. I am a DIYR and this was truly easy install and now Ido enjoy it,
Date published: 2016-04-13
Rated 5 out of 5 by from Great Product This is a great shower assembly I would recommend to anyone who would like to take a bland shower and make it look like custom shower, Gives our bathroom a little bit of class since remodel.
Date published: 2016-04-12
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