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Kohler Back To Wall Toilets with Englefield Bidet Seat
Designed with a sleek contour to seamlessly retrofit popular D-shape toilet pans across Australian and New Zealand homes, bringing the luxury of modern smart toilets to your bathroom. Elevate your daily routine with instant warm water cleansing, an adjustable heated seat, warm air drying, and integrated backflow protection.
Instant Warm Cleansing & Air Drying
Experience continuous warm water across dedicated rear and feminine wash modes. Customize your wash with multi-level water temperature, adjustable water pressure, and multi-position nozzle control.
The gentle, temperature-adjustable warm air dryer delivers a hygienic, hands-free finish that significantly reduces reliance on toilet paper.
Self-Cleaning Nozzle & Antibacterial Materials
Crafted with antibacterial polymer materials on both the seat ring and wand nozzle to actively inhibit bacterial growth and promote everyday bathroom hygiene.
The retractable spray wand automatically rinses with fresh water before and after every cycle, while an integrated carbon deodoriser neutralises unpleasant odours automatically.
Intuitive Controls, Heated Comfort & Soft Close
Control all washing, drying, and temperature preferences effortlessly via the clearly labelled wireless remote control with wall bracket, or through quick-access side buttons.
Enjoy a heated seat with customizable temperature settings for all-season comfort, built-in seat occupancy sensors to prevent misfires, and quiet soft-closing seat and lid dampers.
Integrated AVB Backflow & IPX4 Safety
Equipped with an integral Atmospheric Vacuum Breaker (AVB) tested and compliant with AS/NZS 2845.1 standards to protect domestic drinking water supplies.
Built for wet environments with an IPX4 waterproof rating, integrated LED night light for low-light visits, power-saving mode, and dual overheat and electrical leakage protections (rated up to 150kg user capacity).
| MODEL | |
|---|---|
| Suite Product Code | KH-42329A-Bidet |
| Suite Name | Kohler New Opiaz Back to Wall Toilet Suite with Englefield Bidet Seat |
| Brand | Kohler / Englefield |
| Dimensions | 670 x 360 x 840mm |
| MATERIAL & FINISH | |
| Pan & Cistern Material | Vitreous China |
| Bidet Seat Material | Antibacterial Polypropylene / Polymer |
| Colour | White |
| Finish | Gloss |
| TECHNICAL INFORMATION | |
| Pan Type | Melius Rimless D-Shape Pan |
| Installation Type | Back to Wall |
| Trap Compatibility | Supports both S-Trap and P-Trap installations |
| S-Trap Set Out | 90–120 mm (S-trap connector supplied) |
| P-Trap Set Out Height | 185 mm (P-trap pipe must be purchased separately) |
| Water Inlet Position | Back to Wall Toilet: Top Left Rear or Left/Right Pan Entry Water Inlet; Bidet Seat: Left Water Inlet, Right Power Cord |
| Flush Volume | Dual Flush: 4.5L full flush / 3L half flush |
| Water Supply Pressure | 75–500kPa |
| IP Rating (Bidet Seat) | IPX4 |
| Electrical Requirement | 220–240V AC, 50Hz with dedicated RCD/GFCI protection |
| Backflow Prevention Device | Integrated Atmospheric Vacuum Breaker (AVB) compliant with AS/NZS 2845.1 |
| CERTIFICATION | |
| WaterMark | Approved |
| WELS Star Rating | 4 Star, 4.5L per full flush, 3L per half flush |
| Electrical Safety | AS/NZS Electrical Safety Standards Approved |
| PACKAGE CONTENTS (3 BOXES) | |
| Box 1: Toilet Pan | 1 × Melius Rimless Toilet Pan, S-trap connector, Floor fixing kit |
| Box 2: Cistern Tank | 1 × Melius Toilet Cistern Tank |
| Box 3: Bidet Seat | 1 × New Englefield D-Shape Electronic Bidet Seat with AVB |
| FEATURES | |
| Feature 1 | Melius Rimless Pan -- Modern back-to-wall rimless bowl geometry eliminates dirt traps for hygienic, effortless flushing and easy cleaning. |
| Feature 2 | Instant Warm Cleansing & Dryer -- Continuous instant heated water for rear and feminine washes, paired with an adjustable heated seat and warm air dryer. |
| Feature 3 | Self-Cleaning & Integrated AVB -- Antibacterial wand with automatic pre/post rinse cycles, soft-close hinges, LED night light, and built-in AS/NZS 2845.1 AVB backflow breaker. |
| WARRANTY | |
| Ceramic Toilet Pan |
10 Years total warranty: • Years 1–5: Parts, labour, and freight included • Years 6–10: Parts only |
| Electronic Bidet Seat | 3 Years warranty (Parts only, excluding remote control) |
| Remote Control & Bracket | 1 Year warranty (Parts only) |
📐 Installation & Set-Out Compatibility Guide
The Kohler New Opiaz Back to Wall Toilet Suite supports both wall (P-Trap) and floor (S-Trap) waste outlets. An S-trap connector is included in the package. If your installation requires a P-trap wall outlet, the P-trap pipe must be purchased separately. Please measure your rough-in distance before ordering.
Tip: For S-Trap (floor), measure from the finished tiled wall to the centre of the floor waste pipe. For P-Trap (wall), measure from the finished floor to the centre of the wall waste pipe.
P-Trap (185mm Wall Outlet)
Suitable for: Waste pipe going straight through the bathroom wall
S-Trap (90–120mm Floor Set-Out)
Suitable for: Waste pipe going down into the floor
🧭 Quick Selection & Plumbing Compatibility
| Your Existing Plumbing Setup | Required Set-Out Range | Included / Required Hardware |
|---|---|---|
| Floor Waste Pipe (S-Trap) | 90mm – 120mm (Wall to Centre) | S-Trap connector Included in box |
| Wall Waste Pipe (P-Trap) | 185mm (Floor to Centre) | P-Trap pipe Not included (purchase separately) |
⚠️ Essential Installation Checklist
Technical specifications, product dimensions, and installation guides for the Englefield Electronic Bidet Seat.
KOHLER brings a world of personal expression to the bathroom, combining elegant design, advanced technology, and exceptional craftsmanship. From refined tapware to intelligent toilets and premium bathroom fixtures, KOHLER delivers solutions that balance style and performance. Whether creating a dream bathroom or upgrading a compact space, the brand empowers you to personalise your environment with confidence and precision.
Design-Led Expression
KOHLER products are crafted to elevate personal style, offering refined aesthetics that transform bathrooms into unique, expressive spaces.
Intelligent Innovation
From advanced toilet technology to modern bathroom solutions, KOHLER integrates cutting-edge innovation to enhance comfort and functionality.
Complete Solutions
KOHLER offers a comprehensive range of tapware, toilets, and fixtures, making it easy to create a cohesive and fully customised bathroom space.
Craftsmanship & Expertise
Backed by KOHLER’s global craftsmanship and KB Australia’s local expertise, every product is designed to deliver quality, reliability, and a premium experience.
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Shop KOHLER products →Browse the full KOHLER range and use filters to find the right product, finish and style.
Delivery timeframes, order processing, pickup and delivery charges — everything you need to know about getting your order to you.
Last updated 12 August 2026
| Destination | Delivery time after dispatch |
|---|---|
| Metro areas (all states) | 2–7 business days |
| Regional areas (all states) | 7–15 business days |
Some delays may occur due to circumstances outside our control:
Additional charges beyond the standard delivery fee may apply where:
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| MODEL | |
|---|---|
| Suite Product Code | KH-42329A-Bidet |
| Suite Name | Kohler New Opiaz Back to Wall Toilet Suite with Englefield Bidet Seat |
| Brand | Kohler / Englefield |
| Dimensions | 670 x 360 x 840mm |
| MATERIAL & FINISH | |
| Pan & Cistern Material | Vitreous China |
| Bidet Seat Material | Antibacterial Polypropylene / Polymer |
| Colour | White |
| Finish | Gloss |
| TECHNICAL INFORMATION | |
| Pan Type | Melius Rimless D-Shape Pan |
| Installation Type | Back to Wall |
| Trap Compatibility | Supports both S-Trap and P-Trap installations |
| S-Trap Set Out | 90–120 mm (S-trap connector supplied) |
| P-Trap Set Out Height | 185 mm (P-trap pipe must be purchased separately) |
| Water Inlet Position | Back to Wall Toilet: Top Left Rear or Left/Right Pan Entry Water Inlet; Bidet Seat: Left Water Inlet, Right Power Cord |
| Flush Volume | Dual Flush: 4.5L full flush / 3L half flush |
| Water Supply Pressure | 75–500kPa |
| IP Rating (Bidet Seat) | IPX4 |
| Electrical Requirement | 220–240V AC, 50Hz with dedicated RCD/GFCI protection |
| Backflow Prevention Device | Integrated Atmospheric Vacuum Breaker (AVB) compliant with AS/NZS 2845.1 |
| CERTIFICATION | |
| WaterMark | Approved |
| WELS Star Rating | 4 Star, 4.5L per full flush, 3L per half flush |
| Electrical Safety | AS/NZS Electrical Safety Standards Approved |
| PACKAGE CONTENTS (3 BOXES) | |
| Box 1: Toilet Pan | 1 × Melius Rimless Toilet Pan, S-trap connector, Floor fixing kit |
| Box 2: Cistern Tank | 1 × Melius Toilet Cistern Tank |
| Box 3: Bidet Seat | 1 × New Englefield D-Shape Electronic Bidet Seat with AVB |
| FEATURES | |
| Feature 1 | Melius Rimless Pan -- Modern back-to-wall rimless bowl geometry eliminates dirt traps for hygienic, effortless flushing and easy cleaning. |
| Feature 2 | Instant Warm Cleansing & Dryer -- Continuous instant heated water for rear and feminine washes, paired with an adjustable heated seat and warm air dryer. |
| Feature 3 | Self-Cleaning & Integrated AVB -- Antibacterial wand with automatic pre/post rinse cycles, soft-close hinges, LED night light, and built-in AS/NZS 2845.1 AVB backflow breaker. |
| WARRANTY | |
| Ceramic Toilet Pan |
10 Years total warranty: • Years 1–5: Parts, labour, and freight included • Years 6–10: Parts only |
| Electronic Bidet Seat | 3 Years warranty (Parts only, excluding remote control) |
| Remote Control & Bracket | 1 Year warranty (Parts only) |
Kohler Back To Wall Toilets with Englefield Bidet Seat
Designed with a sleek contour to seamlessly retrofit popular D-shape toilet pans across Australian and New Zealand homes, bringing the luxury of modern smart toilets to your bathroom. Elevate your daily routine with instant warm water cleansing, an adjustable heated seat, warm air drying, and integrated backflow protection.
Instant Warm Cleansing & Air Drying
Experience continuous warm water across dedicated rear and feminine wash modes. Customize your wash with multi-level water temperature, adjustable water pressure, and multi-position nozzle control.
The gentle, temperature-adjustable warm air dryer delivers a hygienic, hands-free finish that significantly reduces reliance on toilet paper.
Self-Cleaning Nozzle & Antibacterial Materials
Crafted with antibacterial polymer materials on both the seat ring and wand nozzle to actively inhibit bacterial growth and promote everyday bathroom hygiene.
The retractable spray wand automatically rinses with fresh water before and after every cycle, while an integrated carbon deodoriser neutralises unpleasant odours automatically.
Intuitive Controls, Heated Comfort & Soft Close
Control all washing, drying, and temperature preferences effortlessly via the clearly labelled wireless remote control with wall bracket, or through quick-access side buttons.
Enjoy a heated seat with customizable temperature settings for all-season comfort, built-in seat occupancy sensors to prevent misfires, and quiet soft-closing seat and lid dampers.
Integrated AVB Backflow & IPX4 Safety
Equipped with an integral Atmospheric Vacuum Breaker (AVB) tested and compliant with AS/NZS 2845.1 standards to protect domestic drinking water supplies.
Built for wet environments with an IPX4 waterproof rating, integrated LED night light for low-light visits, power-saving mode, and dual overheat and electrical leakage protections (rated up to 150kg user capacity).
