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The GROHE Rapido SmartBox Universal Rough-in Box (35604000) is a versatile core component engineered for concealed shower installations. Designed to form the in-wall foundation of many GROHE shower trims, this rough-in box supports multiple outlets and offers flexible depth adjustments. Perfect for solid walls or drywall, it allows clean finishes while ensuring reliable performance behind the scenes.
Key Features & Benefits
Three ½-inch outlets, allowing connection to multiple shower functions.
Two ½-inch inlets positioned below, simplifying feed pipe routing.
Adjustable installation depth from 75 to 105 mm, offering flexibility in wall construction.
DR-brass connection unit for corrosion resistance and long service life.
Comes with a pre-mounted flushing plug for safer, cleaner installation.
Stable built-in box with protective cover to prevent damage during construction.
Fixing options suitable for both solid masonry walls and dry walling / cladding.
Sealing gasket included to help ensure a watertight in-wall fit.
Does not include the final shower set (trim, handles, etc.); these are chosen separately.
5-year manufacturer guarantee for peace of mind.
Specifications
Specification
Detail
Product Code
35604000
EAN
4005176698774
Outlets
3 × ½″
Inlets
2 × ½″ (below)
Installation Depth Range
75 - 105 mm
Connection Material
DR-brass
Box Type
Universal rough-in box; protective cover included
Fixing Compatible
Solid walls & dry cladding / wallboard
Sealing
Gasket included
Trim Set
Sold separately
Guarantee
5 years
Installation Notes
Ensure installation depth of 75–105 mm is maintained for proper alignment with wall finish and trim.
Use appropriate support and fixings when installing within drywall or masonry walls.
After rough-in stage, leave protective cover in place until final trim installation to avoid damage.
Use the pre-mounted flushing plug during system flushing to protect internal components.
Why Choose This Rough-in Box?
The Rapido SmartBox Universal Rough-in Box is essential when you are planning a concealed shower installation with GROHE shower trims. It provides the structural foundation, plumbing interface, and sealing required for a clean look, reliable operation, and long-term durability. Its adjustable depth and flexible fixing options make it suitable for a wide range of wall types and shower system layouts.
Code:
DELIVERY
We aim to deliver all orders within 3-7 working days, dependant on the size of your order or item(s)
Express delivery is available on some items, feel free to contact ourselves to check if your desired product is available for express delivery
Small parcels will be delivered via DX and tracking is provided once dispatched
Large items are delivered via Stop Start or Palletways, details of delivery are provided via email and tracking is also available. Please note most large deliveries are KERB SIDE ONLYalthough some companies will aim to get the goods as close to the door as possible.
Returns are accepted within 28 days of receipt of your goods, however, you must request your return within the first 14 days. You can activate a return request in your account, for more details please visit the "Delivery & Returns" page
Christmas Period Any orders placed from 15th December 2025 maybe delayed until the week commencing 5th January 2026. If you need your order sooner, please contact us before purchase to see when your delivery can take place.
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