Concealed Shower Valve Rough-In Valve Body for In-Wall Installations
Brass rough-in valve body only — CE and cUPC certified, designed for pairing with third-party or custom trim where the valve body is the compliance foundation.
Standard G1/2" connections, 60–90mm rough-in depth, pressure-balanced cartridge. The in-wall component your contractor customers install before tile work starts — certified, dimensionally consistent, and available with OEM trim pairing from 200 pieces.
Product Overview
What This Product Is and Where It Fits in the Line
The concealed shower valve is the rough-in component only — the brass valve body that goes into the wall, handles pressure balancing, and provides the connection points for the trim kit. No trim plate, no handle, no escutcheon. Just the in-wall valve.
That distinction matters commercially. Within our concealed shower product line, most SKUs bundle the valve body with trim. This one doesn't. It exists for two specific sourcing situations: buyers whose customers have a specific trim aesthetic that doesn't match our standard plate profiles, and buyers building a new construction program where the rough-in valve is specified and installed months before the homeowner has made finish decisions. In both cases, the valve body needs to be sourced, certified, and installed independently — and that's exactly what this SKU is designed for.
The valve body carries the CE and cUPC certifications. The trim is sourced separately, whether from our Concealed Shower Trim Kit or from a third-party supplier. This split is intentional: the certification burden sits on the valve body, which is the regulated component. The trim is an aesthetic choice.
Two Sourcing Situations This SKU Solves
Custom or Third-Party Trim Programs
Buyers whose customers have a specific trim aesthetic that doesn't match standard plate profiles. The valve body is sourced and certified independently; trim comes from wherever the finish program requires.
New Construction with Deferred Finish Decisions
Rough-in valve is specified and installed months before the homeowner has made finish decisions. The valve body is installed, inspected, and tiled over — trim is selected and installed later.
Certification Sits on the Valve Body
The CE and cUPC certifications are carried by the valve body — the regulated component. The trim is an aesthetic choice and can be sourced from any compatible supplier without affecting the compliance status of the installed valve.
When to Choose a Different SKU
Complete valve-plus-trim from one source: Use the Concealed Shower Mixer.
Thermostatic temperature control instead of pressure balancing: Use the Concealed Thermostatic Shower Mixer.
Ready to source this valve body for your program?
Get a Quote for This ValveEngineering Data
Technical Specifications
Specifications shown are industry-standard values for this product type. Actual specifications may vary. Contact us for detailed product data sheets and confirmation of exact parameters for your application.
Key Specification Highlights
60–90mm Rough-In Depth
Adjustable range accommodates standard wall assemblies without custom framing.
±0.05mm Valve Seat Tolerance
CNC-machined precision. Consistent seating across production runs means predictable cartridge fit and seal performance.
500,000-Cycle Endurance
Ceramic disc cartridge tested to 500,000 open/close cycles. Relevant for warranty program structuring.
G1/2" Standard Connections
Compatible with the broad market of third-party trim kits. G3/4" available on request for higher-flow applications.
Program Sourcing Summary
OEM & Private Label
Build It Under Your Brand
The concealed shower valve body is one of the most brand-sensitive components in a shower program. It carries your trim, your handle, your finish — and ultimately your warranty. That's why OEM flexibility here matters more than almost anywhere else in the system.
We manufacture this valve body to your specifications: custom rough-in depth, modified port geometry, adjusted cartridge seat dimensions, or alternative inlet sizing. Branding options include laser-engraved logos on the valve body flange, custom packaging inserts, and co-branded installation documentation.
Rough-in depth, port spacing, and outlet orientation modified to match your trim system's dimensional requirements.
Laser-engraved logo on valve body flange. Custom box inserts, installation guides, and QR-coded documentation available.
Seat diameter, flow rate tuning, and temperature limit stop position adjusted to your product specification.
We supply test reports, material declarations, and technical files to support your CE, cUPC, or market-specific certification submissions.
Standard OEM MOQ from 200 pieces. Volume pricing tiers available from 500 pieces. Sample orders accepted prior to program commitment.
We operate under NDA for all OEM programs. Custom tooling and mould ownership options available for exclusive designs.
OEM Program Process
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1
Submit your brief
Share your trim system dimensions, target markets, certification requirements, and annual volume estimate. A one-page brief is enough to start.
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2
Engineering review & DFM
Our engineering team reviews your requirements and returns a design-for-manufacture assessment with any recommended modifications and a preliminary BOM.
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3
Sample production
Pre-production samples dispatched within 15–20 days of design sign-off. Samples include full dimensional report and pressure test certificate.
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4
Mass production & QC
Production runs include 100% pressure testing and dimensional sampling per AQL 2.5. Third-party inspection supported on request.
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5
Ongoing program support
Dedicated account contact, reorder scheduling, and engineering change management for the life of your program.
Start Your OEM Conversation
No commitment required at this stage. Share your brief and we'll come back with a feasibility assessment and indicative pricing within 3 business days.
Installation & Compatibility
What Installers and Specifiers Need to Know
Rough-In Requirements
Wall depth: Minimum 60mm from finished wall face to the back of the stud cavity. 90mm maximum before an extension kit is required. Standard timber-stud or metal-stud framing with tile backer is compatible without modification.
Supply pipe centres: Hot and cold inlets at 150mm centres (standard). Ensure supply pipes are within ±5mm of centre to avoid stress on the valve body after connection.
Mounting height: Typically 900–1,100mm from finished floor level. Confirm with trim kit installation guide for handle ergonomics.
Outlet position: Single outlet centred on valve body. Diverter valve body variant available for two-outlet configurations — see Concealed Shower Diverter Valve.
Water Supply Compatibility
Pressure range: Operates between 0.1 and 0.6 MPa (1–6 bar). Below 0.1 MPa, the pressure-balancing cartridge may not function correctly. Above 0.6 MPa, a pressure-reducing valve should be installed upstream.
Unequal pressure: The pressure-balanced cartridge compensates for hot/cold pressure differentials up to a 2:1 ratio. Beyond this, a thermostatic valve is recommended.
Water quality: Suitable for mains-pressure potable water. In areas with high sediment or scale, a 100-micron inline filter upstream is recommended to protect the ceramic disc cartridge.
Hot water source: Compatible with combi boilers, unvented cylinders, and gravity-fed systems (subject to minimum pressure). Not suitable for gravity-fed systems below 0.1 MPa without a pump.
Trim Kit Compatibility
The valve body uses a G1/2" rough-in standard, which is compatible with the majority of concealed shower trim kits on the market. Our own trim range is designed and dimensioned specifically for this valve body, ensuring flush wall plate seating and correct handle travel.
Our concealed shower trim kits (all finishes)
Standard G1/2" third-party trim kits
OEM trim kits designed to our valve body dimensions
Proprietary trim kits with non-standard spindle engagement — verify dimensions before specifying
Pre-Installation Checklist
- Confirm wall cavity depth is 60–90mm
- Verify supply pressure is within 0.1–0.6 MPa
- Check hot/cold pipe centres are at 150mm
- Flush supply pipes before connecting valve body
- Confirm trim kit spindle engagement compatibility
- Pressure test rough-in before tiling
- Install access panel or service cover per local code
Related System Components
Installation Guide & DXF Files
Full rough-in dimensions, pipe centre drawings, and installation sequence. Available on request.
Request DocumentationThe Valve Body: What We Machine and Why the Tolerances Matter
This is the section most product pages skip, and it's the one that actually tells you whether the valve will perform in the field.
Brass Gravity Casting
Starting Material
Every valve body starts as a brass gravity casting — C36000-equivalent free-machining alloy, poured into steel dies in our Foshan casting hall. After trimming and deburring, each casting moves to CNC machining.
Valve Seat Interface: ±0.05mm
CNC Machining Tolerance
The valve seat interface is machined to ±0.05mm. That's the tolerance that determines whether the ceramic disc cartridge seats correctly, whether the valve holds pressure without weeping, and whether the cartridge can be replaced in the field without the seat having deformed under service pressure.
We check every machined body with a thread gauge before it moves to assembly. Bodies that don't pass go back to machining, not forward to the line.
Ceramic Disc Cartridge: <0.5μm Surface Flatness
Incoming Quality Standard
Ceramic disc surfaces are lapped to a surface flatness of less than 0.5μm — the tolerance that prevents mineral buildup from causing the disc to stick in hard water markets.
We run incoming functional checks on every cartridge batch before they enter the assembly line, and we do 500,000-cycle endurance testing on production batches.
Cartridge Supplier Qualification
We've had two cartridge suppliers over the years who passed paper qualification but showed early failure rates in our endurance testing. Both were removed from the approved list.
We now require a 50,000-cycle pre-qualification test on any new cartridge supplier before they enter production. The 500,000-cycle standard is what tells you whether the cartridge your sample showed is the cartridge your container delivers.
Pressure-Balancing Mechanism
ASSE 1016 Compliant
The pressure-balancing mechanism holds the hot/cold ratio constant when supply pressure fluctuates — the standard protection against thermal shock when a toilet flushes or another fixture opens on the same supply line.
This valve meets ASSE 1016 performance requirements, which is the standard your contractor customers in North America will reference when specifying a pressure-balanced shower valve.
Rough-In Depth: 60–90mm
New Construction Programs
The valve body is designed for installation before tile work. The rough-in depth of 60–90mm covers standard wall construction in North America, Europe, and Australia — drywall plus tile, or tile on cement board.
We include a rough-in guide with every valve body shipment.
If your market has non-standard wall construction — thicker tile assemblies, double-layer drywall, specific commercial wall systems — we can adjust the rough-in depth specification on OEM orders.
Certification Coverage: What the CE and cUPC Marks Actually Mean for Your Shipment
The concealed shower valve carries CE and cUPC certifications. Here's what that means in practice for each of your primary markets.
North America
US and Canada
cUPC certification from IAPMO means the valve meets ASSE 1016 pressure-balancing performance requirements and the lead content requirements of NSF/ANSI 61 and 372.
- Gets the valve approved by the local plumbing inspector for your contractor customers
- Clears the shipment without a customs hold for your broker
- Full documentation package: test reports, certificate of conformity, HS code classification — included with every North American shipment
European Union & UK
EU and United Kingdom
CE certification covers the valve body under the relevant pressure equipment and construction products directives.
- Covers EN 1111 (thermostatic valves) and EN 1016 (pressure-balancing) standards referenced in building codes
- CE declaration of conformity satisfies contractor customers for your distribution partners
- CE declaration prepared in parallel with production and travels with shipment documentation
Australia & New Zealand
ANZ Market
WaterMark certification (AS 4032) is the standard compliance pathway for shower valves in the Australian market.
- Our concealed shower valve line carries WaterMark certification
- Documentation available on request
Middle East & Southeast Asia
UAE, Saudi Arabia, Singapore, Malaysia
CE documentation is accepted in most markets in these regions. For specific markets with local standards requirements, contact us.
- Shipping to UAE, Saudi Arabia, Singapore, and Malaysia for years
- Can advise on market-specific documentation needs
One Valve Body, Three Certification Marks, Three Markets Covered
If you're building a multi-market distribution program, the fact that CE, cUPC, and WaterMark all sit on the same valve body means you're not managing separate certified SKUs for different markets. One valve body, three certification marks, three markets covered.
Test reports, certificates of conformity, and HS code classification available for all markets.
Market Segments
Where This Valve Sells: New Construction and Trim-Flexible Programs
The concealed shower valve's commercial logic is different from the mixer SKUs in this line. It's not a complete solution — it's a foundation component. The buyers who stock it are building programs where the rough-in and the trim are deliberately decoupled.
New Construction & Developer Projects
Primary volume driver for this SKU. Property developers specifying concealed shower systems across multi-unit residential builds — 50 to 500 units per project — need the rough-in valve installed during framing, months before the homeowner or interior designer has made finish decisions.
- Rough-in installs on schedule without waiting for trim selection
- Homeowner picks finish months later; trim kit ordered separately
- Valve body sale creates a captive trim kit reorder downstream
Plumbing Wholesale for Contractor Accounts
Contractors who specify concealed shower systems often have preferred trim suppliers or design brands they work with consistently. They need a certified, dimensionally reliable rough-in valve that pairs with their preferred trim — not a bundled package that forces them to use a specific trim profile.
- Standard G1/2" connections compatible with most third-party trim kits
- Standard trim plate mounting dimensions for broad compatibility
- Certification sits on the valve body — what the plumbing inspector cares about
OEM Program Development
Buyers building a private-label concealed shower program often want to differentiate on the trim — custom plate profiles, proprietary handle designs, branded escutcheons — while using a certified, proven valve body as the foundation.
- OEM development work focuses on the trim kit; valve body is standardized
- Certified valve body keeps tooling costs manageable
- Certification coverage straightforward — no re-certification on trim changes
Building a program around this valve?
Tell us your volume, segment, and trim requirements. We'll confirm compatibility and lead times.
Compatibility & Finish
Trim Compatibility and the Finish Matching Question
The valve body uses standard G1/2" connections and standard trim plate mounting dimensions. In practice, this means it's compatible with most third-party trim kits designed for standard rough-in valves — the mechanical fit is straightforward.
The Finish Mismatch Issue
What comes up more often than the mechanical fit question
If the trim kit comes from a different manufacturer, the finish color and texture will likely differ from any other Wfaucet components in the installation — visibly, under bathroom lighting. Chrome from one plating bath and chrome from another plating bath are not the same color.
In the premium segment, this is a returns driver.
Buyers whose customers want a coordinated finish across all visible components should account for this before specifying a mixed-manufacturer installation.
Scenario A: Design-Brand Trim
For buyers whose customers are sourcing trim from a specific design brand or have a preferred trim supplier, the finish mismatch is usually an accepted trade-off — the design brand's trim is the point, and the valve body is infrastructure.
Scenario B: Coordinated Finish Program
For buyers whose customers want a coordinated finish across all visible components, pairing this valve body with our Concealed Shower Trim Kit is the cleaner solution — all components run through the same finishing line, so the finish matches.
Our Trim Kit Finish Range
Our trim kit range is available in five finishes. All five run on our in-house finishing lines, so finish consistency across a mixed-finish order is controlled by one team.
If you're building a program that includes both the valve body and the trim kit, we can coordinate production to ensure the components ship together.
Connection Standard
G1/2"
Standard inlet/outlet connections. Compatible with most third-party trim kits designed for standard rough-in valves.
Mounting Dimensions
Standard
Trim plate mounting dimensions follow standard rough-in valve geometry. No proprietary spacing that would restrict trim sourcing.
Finish Coordination
5 Finishes
Chrome, brushed nickel, matte black, PVD gold, oil-rubbed bronze — all on in-house finishing lines for consistent color matching.
OEM Valve Body and Trim Development: What Can Be Changed
The valve body itself — the rough-in component — is standardized across our concealed shower line. Standardizing the body keeps tooling costs manageable and certification coverage straightforward. The dimensions that matter for installation (rough-in depth, connection sizes, trim plate mounting pattern) are fixed at the certified specification.
What Can Be Adjusted on OEM Orders
Rough-In Depth
The standard 60–90mm range covers most markets. For markets with non-standard wall construction, we can adjust the rough-in depth specification. This requires a certification documentation update, which we manage with the relevant certification body — you don't run a full re-certification from scratch.
Connection Size
G3/4" inlet connections are available on request for markets or applications where higher flow rates are required.
Private Label Packaging
Branded cartons, installation guides in your language, and private label documentation are available at the standard 200-piece MOQ with no tooling requirement.
Certification Stays on the Valve Body
If your custom trim kit pairs with our certified valve body, the valve body's CE and cUPC certifications remain valid. The certification sits on the valve body, not the trim.
Trim Kit: Where OEM Design Differentiation Happens
Custom trim plate profiles, handle designs, and escutcheon shapes are all within scope. Tooling for a new trim profile runs 25–35 days to first sample; we maintain an in-house tooling room for casting dies and CNC fixtures, so revisions don't go to an outside vendor. MOQ for custom OEM trim starts at 200 pieces — low enough to test a new design in your market before committing to a full container.
Installation Parameters: What Your Contractor Customers Need to Know
Installation parameters affect your downstream customers' project planning — and a valve body that doesn't fit the wall assembly is a returns problem, not a product problem. Share these specifications with your contractor customers before they begin rough-in work.
Rough-In Depth
60–90mm from the finished wall surface. Covers standard residential wall construction in North America (½" drywall + tile on cement board), Europe (standard masonry or drywall + tile), and Australia (standard stud wall + tile). For commercial wall systems with thicker assemblies, confirm the rough-in depth before specifying.
Rough-In Box
The valve body requires a rough-in box or blocking in the wall cavity to hold it at the correct depth and provide a stable mounting surface. Standard rough-in boxes for G1/2" concealed valves are widely available from plumbing supply distributors in all primary markets. We include a rough-in guide with every valve body shipment that specifies the required box dimensions and blocking requirements.
Supply Connections
G1/2" hot and cold supply lines, standard in residential plumbing in North America, Europe, and Australia. G3/4" supply connections are available on request for applications requiring higher flow rates.
Trim Plate Clearance
The trim plate mounting pattern on this valve body is designed to accept our standard trim kit range. For third-party trim kits, verify the mounting pattern dimensions before ordering — we can provide the exact mounting dimensions on request.
Pressure Requirements
Operating pressure range is 0.1–0.6 MPa. Below 0.1 MPa, the pressure-balancing mechanism may not function correctly. Above 0.6 MPa, a pressure-reducing valve should be installed upstream.
Non-Standard Wall Assemblies
We've seen a handful of returns over the years that traced back to rough-in depth mismatches — the valve was installed correctly, but the wall assembly was thicker than standard and the trim plate couldn't reach the mounting points. The rough-in guide we include with every shipment is there specifically to prevent this.
If your customers are working with non-standard wall assemblies, have them contact us before installation.
Logistics & Export
Packaging, Container Loading, and Export Documentation
Everything your freight forwarder needs — carton specs, CBM data, and a complete documentation package — is prepared in parallel with production and ready at container loading.
Carton & Container Packing
- Individual valve bodies packed in foam-lined cartons for transit protection
- Master-carton packed for container optimization
- Standard 40HQ container holds approximately 3,500–4,500 concealed valve bodies depending on configuration
- Carton dimensions calculated against container floor plans before order confirmation
- Packing list with CBM and gross weight per SKU provided so your freight forwarder can quote accurately
Export Documentation Package
Prepared in parallel with production — ready at container loading, not after.
Consolidation & Lead Times
Mixed-SKU Consolidation
For buyers consolidating valve bodies with trim kits or other SKUs in one container, we coordinate the packing sequence to minimize void space and keep the container weight balanced for port handling.
Standard Catalog Items
Order confirmation to container loading for standard catalog items
OEM Orders
For OEM orders with new tooling or rough-in depth modifications
Sibling Products: Choosing the Right Concealed Shower SKU
The concealed shower valve is one of eight products in this line. Use this reference to match your customer's requirement to the correct SKU before quoting.
Customer Needs
Valve body only, pressure-balanced, for pairing with any trim
This product — Concealed Shower ValveCustomer Needs
Thermostatic temperature control (scald protection, code-required in EU/UK/AU commercial)
Concealed Thermostatic Shower MixerCustomer Needs
Trim plate, handle, and escutcheon only (rough-in already installed)
Concealed Shower Trim KitCustomer Needs
Valve plus 3-outlet diverter (overhead + hand shower + body jet)
3-Way Concealed Shower MixerCustomer Needs
Full thermostatic system with rain head, hand shower, and body jets
Concealed Shower SystemFrequently Asked Questions
What is the difference between a concealed shower valve and a concealed shower mixer?
A concealed shower valve is the rough-in component only — the brass body that goes into the wall, handles pressure balancing, and provides connection points for the trim. A concealed shower mixer includes the valve body plus the trim kit (plate, handle, escutcheon) as a bundled package.
The valve-only SKU is for buyers whose customers are sourcing rough-in and trim on separate timelines, or pairing the valve body with a specific third-party trim. If your customers want a complete package from one source, the mixer is the right SKU.
Does this concealed shower valve meet ASSE 1016 requirements for the North American market?
Yes. The valve is pressure-balanced and meets ASSE 1016 performance requirements. cUPC certification from IAPMO is the standard compliance pathway for the US and Canadian markets, and this valve carries cUPC certification.
We provide the full documentation package — test reports, certificate of conformity, and HS code classification — with every North American shipment. If your customs broker needs a binding ruling reference for pre-clearance, we can provide that as well.
What rough-in depth does this valve require, and what if my market has non-standard wall construction?
Standard rough-in depth is 60–90mm from the finished wall surface, covering the most common wall construction thicknesses in North America, Europe, and Australia.
For markets with non-standard wall assemblies — thicker tile systems, double-layer drywall, or specific commercial wall construction — we can adjust the rough-in depth specification on OEM orders. We include a rough-in guide with every valve body shipment; contact us if your market has specific requirements before placing an order.
Can this valve body be used with third-party trim kits?
Yes. The valve body uses standard G1/2" connections and standard trim plate mounting dimensions, so it's mechanically compatible with most third-party trim kits designed for standard rough-in valves.
The practical consideration is finish matching — trim from a different manufacturer will likely differ in finish color and texture from other Wfaucet components in the installation. For buyers whose customers care about finish consistency across all visible components, pairing this valve body with our Concealed Shower Trim Kit is the cleaner solution.
What is the MOQ for this valve body, and can I order it with private label packaging?
MOQ is 200 pieces. Private label packaging — branded cartons, installation guides in your language, private label documentation — is available at the same 200-piece MOQ with no tooling requirement.
For custom OEM trim kits paired with this valve body, MOQ is also 200 pieces with a 25–35 day lead time to first sample for new tooling.
How do I prevent cartridge seizure in hard water markets?
Cartridge seizure in hard water is a ceramic disc tolerance issue. Our ceramic disc valves are lapped to a surface flatness of less than 0.5μm, which prevents mineral buildup from causing the disc to stick under normal hard water conditions.
For markets with extreme water hardness (above 300 ppm calcium carbonate), we recommend specifying a thermostatic cartridge rather than a ceramic disc pressure-balanced valve — the wax element mechanism is less sensitive to mineral buildup. In that case, the Concealed Thermostatic Shower Mixer is the right product.
Get a Quote for This Valve
Send us your target market, volume, and any OEM requirements — rough-in depth adjustments, private label packaging, or trim kit pairing. We'll come back with a detailed quote and, if you're new to this product, a recommendation on whether the valve-only SKU or one of the bundled mixer configurations fits your program better.
Most new buyers in this category start with a 2–3 unit sample order to test with their own customers before committing to a stocking order. We can ship samples within 7–10 days of order confirmation.
What to Include in Your Inquiry
- Target market and applicable certifications required (cUPC, CE, WELS, or other)
- Annual volume estimate and initial stocking order quantity
- Rough-in depth requirements if your market uses non-standard wall construction
- OEM requirements: private label packaging, custom trim kit, or finish specification
- Whether you need valve body only or a bundled mixer configuration
Sample Orders
Most new buyers start with a 2–3 unit sample order before committing to a stocking program. Samples ship within 7–10 days of order confirmation.