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Zurn Z526 - 12" Adjustable Medium Duty Drain

Zurn Z526 - 12" Adjustable Medium Duty Drain

Zurn Z526 - 12" Adjustable Medium Duty Drain

$2,323.07


FREE SHIPPING
SKU Z526-2NH

The Zurn Z526 is a robust area drain designed for high-performance drainage in demanding environments. Engineered to manage significant runoff, it is well suited for use in plazas, loading zones, paved decks, and other high-traffic or industrial surfaces.

Key Features

  • Sturdy, Corrosion-Resistant Body: Built with durable materials and finishes to resist wear, weathering, and mechanical stress over long service life.

  • Load-Rated Grate Design: Equipped with a traffic-capable grate that balances strength and flow capacity, allowing safe passage while maintaining drainage efficiency.

  • Flexible Outlet & Sealing Options: Supports a variety of outlet configurations and integrates with waterproofing membranes and paving systems for secure, leak-resistant interfaces.

Downloads:

Product Codes: Z526-3IC, Z526-4IC, Z526-6IC, Z526-3IG, Z526-4IG, Z526-6IG, Z526-3IP, Z526-4IP, Z526-6IP (if available), Z526-4NL, Z526-3NH, Z526-4NH, Z526-6NH, Z526-3NL, Z526-4NL, Z526-6NL, ZN526-3IC, ZN526-4IC, ZN526-6IC, ZN526-3IG, ZN526-4IG, ZZ526-6IG, ZN526-3IP, ZN526-4IP, ZN526-6IP, ZN526-4NL, ZN526-3NH, ZN526-4NH, ZN526-6NH, ZN526-3NL, ZN526-4NL, ZN526-6NL,

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 Z521 – 12" Adjustable Heavy-Duty Drain

A 12-1/4" (nom.) heavy-duty area drain with a Dura-Coated cast-iron body, bottom outlet, seepage pan, and an adjustable extension frame—finished with a heavy-duty tractor grate for high-traffic surfaces.

In technical terms, the Zurn Z521 combines a cast-iron body, membrane clamp with seepage holes, and an adjustable frame to fine-tune grate elevation. It’s a rugged, serviceable drain that ties neatly into waterproofing and makes finish-grade coordination with pavers, overlays, or toppings much easier.

Zurn Z521 adjustable heavy-duty drain schematic with adjustable frame, clamp, and seepage pan
Zurn Z521 – Dimensional & Adjustment Schematic

Key Features

  • 12-1/4" diameter top with a heavy-duty tractor grate designed for wheel loads and frequent traffic.
  • Adjustable extension frame allows precise finish-grade alignment after pours, toppings, or paver set.
  • Dura-Coated cast-iron body with bottom outlet for long service life.
  • Membrane flashing clamp with seepage holes + seepage pan for clean waterproofing tie-in.
  • Open area (typical grate): about 30 in²; approx. weight: ~60 lb (by configuration).

Where Z521 Excels

Specify Z521 for parking decks, plazas, ramps, loading zones, and industrial slabs where robust inflow and height adjustability are critical. The adjustable frame prevents trip edges and rocking, while the tractor grate withstands carts and wheel impacts.

Options Snapshot

  • -DG Duresist (ductile-iron) grate; -G galvanized CI; -T square top.
  • -TS top secured; -VP vandal-proof; -Y sediment bucket.
  • -TC Neo-Loc test cap (for NL outlets); -S secondary strainer; -V backwater valve (where applicable).
Zurn brand logo
Zurn – Engineered Drainage for Demanding Sites

Specifications at a Glance

Top: 12-1/4" round, heavy-duty tractor grate

Body: Dura-Coated cast iron; bottom outlet

Waterproofing: Seepage pan + clamp with seepage holes

Adjustability: Extension frame for finish-grade tuning

Outlet families: NH No-Hub, NL Neo-Loc, IP Threaded, IC Inside Caulk, IG Inside Gasket

Pipe sizes: 3", 4", 6", 8" (by outlet type)

Finishes (prefix): Z (cast iron), ZB (polished bronze), ZN (polished nickel-bronze)

Open area / weight: ≈30 in² grate; ≈60 lb assembly (refer to submittal)

Always confirm final dimensions, load rating, outlet availability, and accessories on the project submittal.

Installation Highlights

1) Set & Anchor

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

2) Waterproofing Tie-In

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

3) Adjust & Commission

Use the adjustable frame to set final height flush with finishes; install/secure the grate; schedule debris checks ahead of heavy rain or freeze-thaw cycles.

Case Study: Plaza Overlay & Grade Alignment

A civic plaza received an elastomeric overlay over a waterproof deck. Crews selected Zurn Z521 drains with 4" No-Hub outlets, -DG tractor grates, and -TS secured tops. The adjustable frame let installers dial in grate height after overlay placement, eliminating trip edges. After one rainy season, maintenance logs showed faster drawdown and fewer downstream jetting calls—especially at leaf-prone corners where -Y sediment buckets were added.

Frequently Asked Questions

What does “adjustable” mean on Z521?
The extension frame lets you fine-tune grate elevation at finish—ideal for matching pavers, overlays, or slope corrections without re-setting the drain body.
Which outlet connection should I specify?
Match the system: No-Hub (NH) for cast-iron, Neo-Loc (NL) for compression, Threaded (IP) for steel, or Inside Caulk (IC)/Inside Gasket (IG) as detailing requires. Pipe sizes typically include 3", 4", 6", and 8" depending on outlet type.
Are bronze or nickel-bronze tops available?
Yes—use prefixes ZB (polished bronze) or ZN (polished nickel-bronze) where architectural finish matters; base prefix Z is cast iron.