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Zurn Z547 - 21" Heavy-Duty Heel-Proof Parking Deck Drain with Support Flange

Zurn Z547 - 21" Heavy-Duty Heel-Proof Parking Deck Drain with Support Flange

Zurn Z547 - 21" Heavy-Duty Heel-Proof Parking Deck Drain with Support Flange

$3,516.80


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SKU Z547-8NH

The Zurn Z547 is a robust parking deck drain crafted for extreme conditions. With its large 21-inch diameter, it’s designed to manage high volumes of runoff under vehicular loads, while protecting deck structure and waterproofing systems.

Key Features

  • Dura-Coated Cast Iron Body with Bottom Outlet
    Built to resist corrosion and provide long-term structural strength under challenging exposure.

  • Combination Membrane Flashing Clamp with Support Flange
    The integrated flange helps secure the drain to the deck and provides reliable sealing with waterproofing membranes.

  • Extra-Heavy-Duty Heel-Proof Slotted Grate
    Engineered to support heavy traffic and resist damage while allowing high flow capacity.

Downloads:

Product Codes: Z547-8NH, Z547-10NH, Z547-12NH, Z547-8NH-G, Z547-10NH-G, Z547-12NH-G, Z547-8NH-TS, Z547-10NH-TS, Z547-12NH-TS, Z547-8NH-VP, Z547-10NH-VP, Z547-12NH-VP

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  • All items ship for free (standard ground, see map)
  • Call: (800) 604-5537 for pricing and shipping questions. Shipping estimates shown on the map pertain to this specific product only.
  • Orders typically ship in 1-3 business days. Transit times displayed in the map are listed in business days, and are approximate. The day that the order is shipped is not counted as a transit day.
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Zurn Z547 – 21" Heavy-Duty Heel-Proof Parking Deck Drain with Support Flange

A purpose-built parking deck drain combining a wide support flange, membrane clamp, and heel-proof grate to manage high runoff under vehicular traffic.

The Zurn Z547 is a large-format, 21-inch-diameter parking deck drain engineered for durability and safety. In technical terms, it’s a Dura-Coated cast-iron body with bottom outlet and a combination membrane flashing clamp with support flange—in plain English, it anchors securely to the deck, ties cleanly into the waterproofing, and uses a heel-proof slotted grate that won’t catch heels or small wheels while handling heavy loads.

Zurn Z547 parking deck drain installation schematic
Zurn Z547 – Typical Parking Deck Installation

Key Features

  • 21" diameter drain provides a large collection area for high-volume runoff.
  • Support flange + membrane clamp anchor to the slab and integrate with waterproofing for a watertight assembly.
  • Heavy-duty heel-proof slotted grate supports vehicle traffic and helps prevent trip hazards.
  • Dura-Coated cast-iron body built for long-term service in harsh deck environments.
  • Bottom outlet for straightforward tie-in to vertical drainage piping.

Where It Excels

Use the Z547 on parking decks, ramps, precast structures, and exposed garage levels where drains must resist impact, traffic, and weather. The heel-proof grate design improves pedestrian safety, and the wide flange simplifies integration with deck membranes and overlays.

Sizing & Options (Snapshot)

  • Nominal diameter: 21"
  • Pipe sizes: commonly offered in 8", 10", 12" outlets (see submittal for selections)
  • Top: heel-proof, slotted grate; secured options available
  • Body: Dura-Coated cast iron; bottom outlet
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Zurn Z547 dimensional schematic
Zurn Z547 – Dimensional & Component Schematic

Specifications at a Glance

Diameter: 21"

Grate: Heel-proof, slotted; secured options available

Body: Dura-Coated cast iron

Outlet: Bottom outlet (typ. 8"/10"/12" pipe sizes)

Flange: Wide support flange + membrane clamp

Use: Parking decks, ramps, exposed garages

Installation Highlights

1) Set & Secure

Set body to elevation; anchor via the support flange; confirm slope to drain across the deck.

2) Waterproofing Tie-In

Integrate the membrane flashing clamp with the deck waterproofing per detailing.

3) Top & Protection

Install heel-proof grate; protect during pours/overlays; verify securement before opening to traffic.

Case Study: Municipal Parking Garage Resurfacing

During a top-deck resurfacing, engineers replaced undersized drains that caused ponding and membrane leaks. The project team selected Zurn Z547 units for their 21" collection area, heavy-duty heel-proof grate, and integrated support flange. After one winter season, maintenance logs showed faster stormwater removal, fewer freeze-thaw issues at joints, and zero grate-related trip incidents.

Frequently Asked Questions

What does “heel-proof” mean?
Heel-proof grates use narrow slots so high heels, canes, or small wheels don’t catch—improving safety on pedestrian areas of decks.
Why the support flange and membrane clamp?
The wide flange provides structural bearing and anchorage, while the clamp ties into the waterproofing membrane to help prevent leaks at the drain penetration.
What pipe sizes are typical?
Common submittals list 8", 10", and 12" outlets; always verify pipe size and outlet style on the project specification sheet.