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For wet-area drainage installations requiring verified compliance, the Megaflex Puddle Flange provides a secure connection between the waterproofing membrane and the drainage riser. Bearing WaterMark certification, this flange ensures compliance with Australian plumbing standards at the critical transition point where subsurface moisture meets the waste pipe.
WaterMark-certified drainage transition
The Megaflex Puddle Flange is designed to integrate into floor waste assemblies, preventing leaks into the surrounding subfloor by directing moisture from the membrane level straight into the drainage riser. The low-profile flange thickness allows waterproofing membranes to sit flush, reducing the risk of pooling water around the waste collar. Available in three outlet sizes, each unit features a white finish designed for compatibility with standard Australian drainage pipe diameters.
Numbers that matter
- WaterMark certification: Verifies the flange meets national plumbing and safety standards for installation in Australian wet areas.
- 3.5mm to 4mm flange thickness: Low-profile height (3.5mm for the 50mm flange; 4mm for the 80mm and 100mm flanges) to minimise build-up and maintain correct fall at the waste connection.
- 50.8mm to 102mm outlet outer diameters: Sized for direct mechanical fit over standard DWV pipe sizes (50.8mm, 75mm, and 102mm options available).
Sizing and dimensions
To match specific drainage riser configurations, select from the three available sizes:
- Megaflex 50mm Flange (Code: 32101): 110mm width x 110mm length, 3.5mm flange thickness, 36.5mm total height, 50.8mm outlet outer diameter. Carton quantity of 200.
- Megaflex 80mm Flange (Code: 32111): 124mm width x 124mm length, 4mm flange thickness, 49.9mm total height, 75mm outlet outer diameter. Carton quantity of 100.
- Megaflex 100mm Flange (Code: 32121): 145mm width x 145mm length, 4mm flange thickness, 60mm total height, 102mm outlet outer diameter. Carton quantity of 90.
Frequently asked questions
How is the Megaflex™ Puddle Flange installed in a concrete slab?
Position the flange at the pipe penetration, secure it, and pour concrete around it. Ensure the flange is sealed into the waterproofing membrane for a watertight finish.
Is the Megaflex™ Puddle Flange suitable for waterproofing applications?
Yes, it is specifically designed for waterproofing. The flange creates a durable, high-grade PVC water-stop that prevents moisture tracking at pipe penetrations in concrete slabs.
Can this flange be used with all pipe materials?
It is compatible with PVC and CPVC pipes. For other pipe materials, ensure that correct adaptors or fittings are used to maintain a secure and watertight connection.
Is the Megaflex™ Puddle Flange approved for potable water systems?
No, it is designed for drainage and waterproofing, not potable water. For drinking water applications, use products that are specifically WaterMark-certified for potable water contact.
Applications and benefits
| Application | Key benefit | Primary trades |
|---|---|---|
| Concrete slab penetrations in wet areas | Creates a permanent water-stop, preventing water tracking and slab damage at pipe entries. | Plumbers, Waterproofers, Concreters |
| Basement waterproofing and drainage systems | Ensures watertight integrity where pipes pass through structural elements, reducing risk of water ingress. | Waterproofers, Civil Contractors |
| Commercial and residential wet area plumbing | Provides a reliable, AS/NZS 1260 compliant seal for shower, toilet, and laundry drains in concrete floors. | Plumbers, Builders |
| Integration with waterproofing membranes | Designed to accept and bond with liquid or sheet membranes, forming a continuous barrier around penetrations. | Waterproofers, Tilers |
How to apply Megaflex™ Puddle Flange:
- Determine pipe location and cut hole in formwork
- Place flange around pipe, aligning with slab and membrane
- Secure flange and apply solvent cement to pipe and flange
- Pour concrete around flange, ensuring no movement
- Allow concrete and cement to cure fully before testing
Product limitations
- Not for: Pressurised systems or potable water use. It is engineered for drainage and waterproofing applications only.
- Installation timing: Must be installed prior to the concrete slab pour to ensure proper integration and effective sealing.
- UV exposure: Limited UV resistance. Not suitable for prolonged outdoor exposure without protection.
Safety and handling
Personal protective equipment
Wear gloves and eye protection. Use a dust mask if cutting or abrading the flange material.
Ventilation
Ensure adequate ventilation when applying PVC cement or other solvents during installation.
First aid
- Inhalation: If dust or fumes from cutting are inhaled, move to fresh air.
- Skin contact: Wash thoroughly with soap and water.
- Eye contact: Rinse immediately with plenty of water for at least 15 minutes.
Storage and disposal
Store in a cool, dry place, away from direct sunlight and heat sources. The flange has an indefinite shelf life when stored correctly. Dispose of waste in accordance with local regulations.
Substrate guide
Proper substrate preparation and integration ensure the Megaflex™ Puddle Flange creates a reliable water-stop at penetrations.
Concrete slabs
Surface prep: Ensure the area where the flange is positioned is clean and free of debris. The flange is integrated during the concrete pour itself.
Primer: Not required for the flange's direct integration into concrete.
Waterproof membranes
Surface prep: The membrane surface must be clean, dry, and prepared according to the membrane manufacturer's specifications for sealing around penetrations.
Primer: Follow the waterproofing membrane manufacturer's guidance for primer application to ensure a strong bond between the membrane and the PVC flange.
PVC piping
Surface prep: Pipes must be clean, dry, and free from burrs or grease. Chamfer pipe ends as per standard plumbing practice.
Primer: Use a compatible PVC primer before applying PVC cement to ensure a strong, solvent-welded bond between the pipe and the flange.
Product documents
Megaflex™ Puddle Flange Physical Properties
| Property | Value |
|---|---|
| Material | High-Grade PVC |
| Finish | White |
| Available Sizes | 50mm, 80mm, 100mm |
| Temperature Resistance | Up to 60°C |
| Certifications | WaterMark Certified, AS/NZS 1260 |
| Storage Temperature | 5°C to 35°C |
| Shelf Life | Indefinite |
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