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Zurn Z503 - 15" Heavy-Duty Area Drain

Zurn Z503 - 15" Heavy-Duty Area Drain

Zurn Z503 - 15" Heavy-Duty Area Drain

$4,532.00


FREE SHIPPING
SKU Z503-2NH

The Zurn Z503 is a 15-inch diameter, extra heavy-duty area drain engineered for demanding commercial and industrial environments. Built to handle heavy runoff and resist wear, this floor drain delivers dependable performance with a rugged design and flexible installation options.

Key Features

  • Durable Dura-Coated Cast Iron Body: Provides strength and corrosion resistance for long service life in harsh settings.

  • Anti-Tilt Slotted Grate & Seepage Pan: Heavy-duty, anti-tilt grate design paired with a seepage pan enhances performance and stability.

  • Bottom Outlet & Flexible Configuration: Standard bottom outlet with a variety of connection types and top finishes (cast iron, polished bronze, or polished nickel bronze) to fit diverse system requirements.

Downloads:

Product Codes: Z503-2IC, Z503-3IC, Z503-4IC, Z503-2IG, Z503-3IG, Z503-4IG, Z503-2IP, Z503-3IP, Z503-4IP, Z503-2NH, Z503-3NH, Z503-4NH, Z503-2NL, Z503-3NL, Z503-4NL, ZB503-2IC, ZB503-3IC, ZB503-4IC, ZB503-2IG, ZB503-3IG, ZB503-4IG, ZB503-2IP, ZB503-3IP, ZB503-4IP, ZB503-2NH, ZB503-3NH, ZB503-4NH, ZB503-2NL, ZB503-3NL, ZB503-4NL, ZN503-2IC, ZN503-3IC, ZN503-4IC, ZN503-2IG, ZN503-3IG, ZN503-4IG, ZN503-2IP, ZN503-3IP, ZN503-4IP, ZN503-2NH, ZN503-3NH, ZN503-4NH, ZN503-2NL, ZN503-3NL, ZN503-4NL,

Frequently Asked Questions

View Our Full Selection of Zurn Drains →

Shipping

  • 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 Z503 – 15" Heavy-Duty Area Drain

A 15-3/8" diameter, heavy-duty area drain featuring a Dura-Coated cast-iron body with bottom outlet, seepage pan, and a combination membrane flashing clamp & frame—topped by a heavy-duty anti-tilt slotted grate for traffic-rated hardscapes.

In technical terms, the Zurn Z503 integrates cleanly with waterproofing and maintains high inflow with a large, anti-tilt grate. In plain English: it’s a rugged, service-friendly point drain that keeps decks, ramps, plazas, and industrial slabs draining efficiently.

Zurn Z503 heavy-duty area drain schematic showing 15-3/8 inch top, clamp/frame, seepage pan, and outlet
Zurn Z503 – Dimensional & Component Schematic

Key Features

  • 15-3/8" diameter top with heavy-duty anti-tilt slotted grate for dependable inflow under traffic.
  • Dura-Coated cast-iron body with bottom outlet for long service life.
  • Combination flashing clamp & frame with seepage pan for a clean, secure waterproofing tie-in.
  • Large open area: about 53 in² of grate opening to move water quickly.
  • Approx. assembly weight: 62–65 lb typical (by outlet size).

Where Z503 Excels

Specify Z503 for parking decks, entry ramps, plazas, loading zones, and industrial slabs where membrane integration, durability, and fast draw-down are critical. The anti-tilt grate resists rocking and impact, while the clamp/frame keeps the waterproofing detail tight.

Options & Finishes (Snapshot)

  • Outlet families: NH No-Hub (2", 3", 4", 6", 8"), NL Neo-Loc (2", 3", 4"), IC/IG Inside Caulk/Gasket (3", 4", 6"), plus IP Threaded on select models.
  • Top finishes (prefix): Z (cast iron), ZB (polished bronze), ZN (polished nickel-bronze).
  • Popular suffixes: -DG Duresist grate, -TS top secured, -VP vandal-proof, -Y sediment bucket, -AR acid-resist epoxy, -G galvanized, -TC Neo-Loc test cap (NL bottom outlet), -S secondary strainer (2–4" outlets).
Zurn brand logo
Zurn – Engineered Drainage for Demanding Sites

Specifications at a Glance

Top: 15-3/8" round, heavy-duty anti-tilt slotted grate

Body: Dura-Coated cast iron; bottom outlet

Waterproofing: Seepage pan + combination flashing clamp & frame

Grate open area: ≈ 53 in² (verify per submittal)

Outlets: NH / NL / IC / IG (sizes per family; see above)

Approx. weight: 62–65 lb (by outlet size)

Always confirm final dimensions, loading, outlet type/size, and furnished options on the project submittal.

Installation Highlights

1) Set & Anchor

Seat the drain body at rough elevation; anchor per detail; verify positive slope to the drain across the slab or paver bed.

2) Waterproofing Tie-In

Integrate the seepage pan and clamp/frame with the membrane; protect the assembly during pours or overlays.

3) Commission & Maintain

Install/secure the grate; consider a -Y sediment bucket near landscaping or grit sources; schedule pre-storm clean-outs.

Case Study: Ramp Ponding on an Industrial Deck

An industrial deck experienced ponding at slope transitions after resurfacing. The retrofit standardized on Zurn Z503 drains with 6" No-Hub outlets, -DG ductile-iron grates, and -TS secured tops. Crews tied the membrane into the clamp/frame and added -Y sediment buckets near planters. Result: faster draw-down during storms, less grate rocking, and fewer downstream jetting calls through the rainy season.

Frequently Asked Questions

What does “anti-tilt” mean on the Z503 grate?
The grate and frame are designed to resist rocking under wheel loads, maintaining a flush surface and reducing damage or noise.
Which outlet should I specify?
Match your piping system: NH No-Hub for cast-iron, NL Neo-Loc for compression fit, IC/IG for inside caulk/gasket, or threaded where available. Sizes vary by outlet family (2"–8" typical for Z503).
Is a sediment bucket included?
A -Y sediment bucket is available; it helps trap debris before it reaches the line. Verify furnish and any accessories (e.g., -TC Neo-Loc test cap) on the submittal.