Grohe 35 026 GrohFlex Universal Rough-In Box

- Item #: BCI1859691

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  • GroheFlex Installation Video
    A Brief Installtion Video on the GroheFlex Valve and Trim options
  • GroheFlex Universal Rough-In Valve System
    Leap Forward with GroheFlex, Grohe's New Advance Universal Valve System. 1 Valve, 31 Valve Trim Options - Saves Time and Money!

GrohFlex Universal Rough-In Box

  • 1/2” inlets and outlets
  • Fixing points for front and back wall
  • Integrated service stops
  • Flushing plug
  • Up to 14 gpm
  • Pressure balance or thermostatic based off shower valve trim chosen
  • (Timeless, Authentic, Cosmo Square, Cosmopolitan, Allure Brilliant & Grotherm)         

Additional Grohe Links

Our SKU: Grohe 35 026

This product is listed under the following manufacturer number(s):

  • Grohe 35026000

*Denotes a finish or option that has been discontinued

Grohe 35 026 Product Specifications

Specification Sheet
Manufacturer Warranty
Depth 4.313
Height 5.188
Product Weight 2.97
Width 6.69

Installation Resource Center

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Grohe 35 026 Reviews

Rated 1 out of 5 by from Disappointed with this product I'm a DIY'er, engineer. I've installed a number of Grohe products, including shower valves. I've always been impressed with the quality - this Grohe Flex is a different beast. It looks very simple, however there are no instructions included - none - nada. I did find a Grohe produced video on you-tube. In the video it shows that you mount 2x4's horzontally across the studs. The Flex has mounting holes - both in the front and back. You can't use the rear holes in a 2x4 wall. If you use the front holes - the 2x4 supports interfere with the shower/tub outlets. You can see this in the first picture. The 'mounting ears' are about 1/2" long - that means the fastening screws are about 1/4" from the egde of the 2X4. Lastly, if you want your drop eared ell to be just through the cement board - you need to use soft copper to bring it forward - see 2nd picture. All in all this is a nightmare to work with. You'll spend a lot of extra time getting this to work out. Would not purchase again.
Date published: 2013-11-30
  • I was hoping to find a rough in box with 3/4" inlet to optimize my water supply, am I dreaming or are they all 1/2"?

    A. What trim are you using that you need a 3/4" inlet and how shower functions are you going to have?
  • Does this valve have 4 ports and front-accessible water supply shutoffs?

    A. The Grohe 35 026 does have 4 ports and an integrated service stop.

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