Sealing shower penetrations to prevent leaks
Delivering throughout New Zealand and internationally

NZBC Clause E3 compliance explained: protect the wall behind your tapware

Support E3 compliance at tapware penetrations
Direct trapped water out where it can be seen
Keep tapware accessible for servicing
Contact Wetwall Caddy™ about E3 support and compatibility with your tapware. Supplying wall cavity protectors throughout New Zealand and internationally.

Protect the openings your shower lining cannot avoid

Tiles, acrylic liners and waterproofing systems protect bathroom surfaces, but mixers and outlets still need openings through the wall. These tapware penetrations can be overlooked, leaving a route for water to reach the cavity behind them.

Water entering through an unsealed penetration, a leaking connection or failed tapware can remain hidden. Framing, linings, insulation and fixings may be affected before there is an obvious sign of damage.

Wetwall Caddy™ provides a proprietary flanged waterproofing solution that supports NZBC Clause E3 compliance while retaining access for tapware servicing. Patented and made in New Zealand, the system has protected wet areas for around 20 years, with more than 30,000 units supplied.

Wetwall Caddy and E3 support at a glance

  • Wetwall Caddy™ supplies wall cavity protectors for tapware penetrations in wet areas.
  • Products are made in New Zealand and supplied nationwide and internationally.
  • The range helps homeowners, plumbers, builders and designers planning new builds and renovations.
  • The proprietary flanged solution supports NZBC Clause E3 internal moisture compliance.
  • The caddy encloses the water control valve and seals against the wall lining.
  • Contained water discharges out the front of the wall rather than into the cavity.
  • The design retains the access opening required for tapware servicing and warranty purposes.
  • Standard and custom options suit tile and acrylic lined showers.
  • Custom caddies are 3D printed to order for specific tapware or architectural drawings.
  • Send the mixer product code to Wetwall Caddy to check compatibility before ordering.

Address moisture at the tapware penetration

NZBC Clause E3 concerns internal moisture. At shower tapware penetrations, the practical issue is protecting the wall cavity behind tapware from moisture without losing the opening needed to access the fittings. Wetwall Caddy supports E3 compliance at this specific part of the wet-area installation; it is not a replacement for the wider waterproofing system.

The standard Wetwall Caddy shower pack is described as meeting E3/AS1 and AS/NZS 3140. Its moulded ABS cup encloses the valve, while the clear polycarbonate flange allows the seal to be checked visually. Water entering the caddy is contained and directed out the front, making a leak visible rather than leaving it hidden behind the lining.

Keep protection and servicing access working together

Tapware manufacturers require an access opening for servicing and warranty purposes. Wetwall Caddy retains that opening, allowing access to the water control valve by removing the mixer faceplate. A registered plumber or builder can install the caddy without changing the normal tapware fitting steps.

Standard caddies suit most shower mixers, with custom options for tapware or pipework outside the standard range. Send Wetwall Caddy your mixer product code to check suitability. Where a custom solution is needed, caddies can be designed and 3D printed in New Zealand to suit the selected tapware or architectural drawings.

Frequently Asked Questions

Clause E3 concerns internal moisture. Wetwall Caddy provides a proprietary flanged solution that supports compliance at tapware penetrations; it does not replace the wider wet-area waterproofing system.

The caddy encloses the water control valve and seals against the wall lining. It contains water and directs it out the front of the wall, where it can be seen, rather than into the wall cavity.

Yes. Wetwall Caddy retains the access opening required by tapware manufacturers for servicing and warranty purposes. The valve can be accessed by removing the mixer faceplate.

Standard and custom options suit tile and acrylic lined showers. Send your mixer product code to check compatibility. Custom caddies can be 3D printed to suit tapware or pipework outside the standard range.

A registered plumber or builder can install it. The caddy is designed to work alongside normal tapware fitting steps.
What: Wetwall Caddy™ supplies tapware penetration protectors that support NZBC Clause E3 internal moisture compliance while retaining servicing access.
Where: Wetwall Caddy™ wall cavity protectors are made in New Zealand and supplied throughout New Zealand and internationally.
Who for: Wetwall Caddy™ wall cavity protectors suit homeowners, plumbers, builders and designers planning wet-area installations in new builds and renovations.

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Sealing shower penetrations to prevent leaks
Delivering throughout New Zealand and internationally