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GoBoard Shower Mixing Valve Seal - 4-1/2"
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At a Glance
Quick Decision Guide
Opening Size
4-1/2" (115 mm)
Application
Shower Mixing Valve Penetrations
Thin-Set Compatibility
Modified & Unmodified
Waterproofing Standard
ANSI A118.10
Installation Area
Interior Showers
Residential Use
Yes
Commercial Use
Yes
Country of Origin
USA
Why Choose This Product
Key Benefits
Preformed Opening
Provides a defined 4-1/2" opening for compatible shower mixing valves
Waterproof Penetration
Helps direct water around the valve opening
Flexible Collar
Creates a close seal around compatible valve penetrations
GoBoard Compatibility
Works with GoBoard Membrane, GoBoard and GoBoard Pro
Mortar Compatibility
Bonds with modified or unmodified thin-set mortar
Tested System Component
Included within the GoBoard system evaluated to ANSI A118.10
Product Information
Product Details
Specifications
Brand
GoBoard®
Part Number
70008446
UPC
031979220649
Product Type
Mixing Valve Seal
Opening Size
4-1/2" (115 mm)
Application
Shower Mixing Valve Penetrations
Compatible Systems
GoBoard Waterproofing Systems
Compatible Mortars
Modified & Unmodified Thin-Set
Waterproofing Standard
ANSI A118.10
Installation Area
Interior Showers
Residential Use
Yes
Commercial Use
Yes
Country of Origin
USA
About This Product
Waterproof Mixing Valve Seal for Showers
The GoBoard® Mixing Valve Seal protects the wall penetration around a shower mixing valve, helping direct water away from the opening and maintain a continuous waterproofing layer behind the tile. Its preformed construction provides a consistent seal without cutting and shaping loose membrane around the valve.
Preformed 4-1/2" Valve Seal
A flexible collar surrounds the pre-cut 4-1/2" opening and integrates with the adjoining waterproofing fabric. The defined opening provides a close fit around compatible shower mixing valve penetrations, reducing gaps that could interrupt the waterproofing assembly.
Compatible with GoBoard Waterproofing Systems
The seal works with GoBoard Membrane, GoBoard, and GoBoard Pro. Its fabric surface bonds with modified or unmodified thin-set mortar, allowing the valve penetration to integrate with the surrounding GoBoard shower waterproofing system.
Common Questions
Frequently Asked Questions
What does the GoBoard Mixing Valve Seal do?
The seal waterproofs the wall penetration surrounding a compatible shower mixing valve. Its preformed collar helps direct water around the valve opening while the adjoining fabric connects with the surrounding GoBoard waterproofing layer behind the finished tile.
What size opening does the Mixing Valve Seal have?
The seal has a pre-cut 4-1/2" opening for compatible shower mixing valve penetrations. Measure the required wall opening and review the valve manufacturer’s clearance requirements before installation because valve bodies, protective guards, and trim assemblies can require different opening dimensions.
Does the GoBoard Mixing Valve Seal fit every shower valve?
Not automatically. The seal has a fixed 4-1/2" opening, so the required penetration size must be confirmed before installation. If the valve requires a larger or smaller wall opening, use an appropriately sized waterproofing method that complies with the valve and waterproofing system instructions.
Which GoBoard products are compatible with the valve seal?
The Mixing Valve Seal can be integrated with GoBoard Membrane, standard GoBoard tile backer board, and GoBoard Pro. It is designed to connect the mixing valve penetration with the adjoining GoBoard waterproofing assembly rather than function as a complete standalone waterproofing system.
What thin-set mortar can be used with the seal?
The seal is compatible with unmodified dry-set mortar meeting ANSI A118.1 or polymer-modified thin-set mortar meeting ANSI A118.4. The fabric must be fully embedded without voids or air pockets, following the applicable mortar requirements and published GoBoard installation instructions.
Is the Mixing Valve Seal ANSI A118.10 compliant?
The Mixing Valve Seal is included within the GoBoard Membrane accessory system covered by ICC-ES PMG-1439, which lists system compliance with TCNA/ANSI A118.10. Performance depends on installing the complete waterproofing assembly according to GoBoard instructions rather than treating the seal as an independent system.
Can the valve seal be used in residential and commercial showers?
The seal is suitable for GoBoard shower waterproofing in residential and light-commercial tile installations. ICC-ES PMG-1439 also includes it among GoBoard Membrane accessories evaluated for continuous-use steam showers when the complete assembly is installed according to GoBoard requirements.