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Zurn Z887 - Catch Basin

Zurn Z887 - Catch Basin

Zurn Z887 - Catch Basin

$1,293.00


FREE SHIPPING
SKU Z887

The Zurn Z887-24 is a robust catch basin designed for effective surface drainage in commercial or industrial settings. Its 24-inch diameter body accommodates high flow, while the durable construction ensures long-term performance under heavy use. Ideal for applications where large storm surges or surface runoff must be managed reliably.

Key Features

  • Large 24″ diameter basin for high capacity drainage

  • Durable construction designed for heavy duty commercial or industrial environments

  • Suitable for integration with trench drain systems or other surface drainage channels



Note: Zurn trench drain products are subject to a $750 minimum order.


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Trench Drainage & Surface Water Management

Zurn Z887 Catch Basin Guide (Z887-24-HD): Sizing, Options, Installation, and Maintenance

The Zurn Z887 series is designed to simplify trench drain terminations and transitions by providing a compact, durable catch basin that can accept multiple connections. This guide focuses on the Z887-24-HD (24" × 24" catch basin with heavy-duty frame assembly), including how to specify the right outlet, grate class, and jobsite installation details.

Updated: December 2025

Table of Contents

1) What a Catch Basin Does

A catch basin is a collection box that receives surface runoff and/or water coming from trench drains and directs it into underground piping. In technical terms, it’s a collection and transition structure: it collects flow, slows it down, drops out heavier sediment, and provides a connection point to one or more outlet lines.

Plain-English view: A catch basin is the “meeting point” where water from one or more drains can collect and then exit through a pipe—without forcing you to tie every run together underground.

Where Z887-style basins are commonly used

  • Parking lots & drive lanes: to collect trench drain flow and route to storm piping.
  • Loading docks & service yards: where washdown + rainfall needs a durable transition structure.
  • Industrial sites: where chemical resistance and corrosion resistance matter (verify compatibility).
  • End-of-run terminations: when a long trench run needs a reliable “exit point” into piping.
Zurn Z887 catch basin installed in roadway surface
Zurn Z887 Catch Basin in Roadway Application

2) Zurn Z887-24-HD Overview

The Zurn Z887-24-HD is a 24" × 24" × 24" catch basin built from high-density polyethylene (HDPE) with a heavy-duty frame assembly. HDPE is a tough, low water-absorption plastic used in demanding environments because it resists corrosion and won’t spall like concrete in freeze/thaw cycles.

Key specs that typically drive selection

  • Overall size: 23-1/4" wide reveal × 24-5/8" long × 24" deep
  • Material: 0% water-absorbent HDPE body (lightweight compared to precast)
  • Stability: mechanically locks into concrete surround + rebar clips for elevation set
  • Grate/frame: heavy-duty frame with lock-down slotted ductile iron grate available in multiple load classes
Why this matters: In the field, catch basin failures often come from corrosion, shifting, or concrete cracking around the frame. A corrosion-resistant body plus a properly encased frame helps reduce those long-term issues.

3) Options That Affect Performance

Z887 basins are popular because you can configure them for your job conditions. The smart approach is to decide your grate class, outlet size, and any sediment/depth needs early—before the concrete work starts.

A) Grate load class (DIN EN 1433)

Grates are often specified by load class (a standardized way to describe expected traffic/loading). In plain terms: higher class = more robust grate/frame selection for heavier service.

  • Class A / B: lighter-duty pedestrian/light service areas (verify site requirements).
  • Class C: common for commercial drive lanes and service areas.
  • Class F: heavy-duty applications where higher loads may be present (confirm with project engineer).

B) Outlet adapters (no-hub end or bottom outlets)

The Z887-24-HD can be configured with different outlet adapters (commonly 3", 4", or 6" no-hub end/bottom outlet options). Your outlet size should match the downstream storm line and the expected flow—oversimplifying this is a common cause of ponding.

Field tip: If the trench run is long, the outlet is usually the bottleneck. Confirm pipe slope, diameter, and discharge point. A big catch basin can’t compensate for an undersized or poorly-sloped downstream line.

C) Sediment bucket + extensions

  • Sediment bucket: helps capture debris before it enters the outlet line—especially helpful in parking lots and drive lanes.
  • Body extensions: increase depth/capacity when needed (often in 12" increments depending on configuration).
Illustration of Zurn Z887 catch basin showing frame and grate assembly
Zurn Z887 Catch Basin Illustration (Frame & Grate Assembly)

4) Practical Design Rules (How to Get Better Real-World Performance)

Catch basins are simple components, but performance depends on how they’re used in the system. These rules-of-thumb help prevent the most common “it drains slow” problems.

Placement & grading

  • Put it at the true low point: verify elevations—don’t rely on visual slope.
  • Don’t starve the inlet: ensure the trench run or surface grading actually delivers water to the basin.
  • Plan clean access: you want room to lift the grate and service the bucket (if used).

Connection strategy (simple planning wins)

  • Minimize sharp turns: smoother flow means fewer sediment buildups.
  • Use the basin to simplify tie-ins: multiple trench runs can meet at one basin instead of multiple underground wyes.
  • Protect downstream piping: sediment control reduces jetting/cleanout frequency.

5) Installation Best Practices

A catch basin should be treated like a structural component. Most long-term failures come from improper concrete support, frame movement, or incorrect elevation relative to the finished surface.

Step-by-step installation workflow

  1. Dry-fit the layout: confirm trench-to-basin alignment and outlet orientation (end vs bottom outlet as specified).
  2. Set elevation: establish finished grade so the grate will be flush—neither proud (trip hazard) nor low (debris trap).
  3. Secure and align: use rebar clips/positioning features to hold the body stable before pour.
  4. Concrete encasement: provide continuous support around the basin and under it (commonly a minimum 4" concrete surround on all sides and bottom—verify project details and local code).
  5. Connect inlet/outlet cleanly: avoid forcing pipe alignment; strain at the connection can cause leaks or movement later.
  6. Protect the opening during construction: keep concrete, aggregate, and debris out of the body.
  7. Water test: confirm flow enters freely and exits without standing water at the rim.
Common pitfall: Setting the frame/grate perfectly—but leaving voids or weak support below. Frame movement is a leading cause of cracked surrounding concrete.
Zurn logo
Zurn Trench Drainage & Catch Basin Systems

When to involve the engineer

If the basin is in a heavy-traffic area (forklifts, trucks, high point loads) or if you’re unsure about concrete reinforcement and encasement, it’s worth getting the engineer of record involved early. The specifying engineer is typically responsible for the final encasement and reinforcing design based on application and local codes.

Quick install checklist (print-friendly)

  • ☐ Confirm low point + finished grade
  • ☐ Verify grate class matches traffic
  • ☐ Confirm outlet size + pipe slope downstream
  • ☐ Provide continuous concrete support around and under basin
  • ☐ Keep basin clean during construction

6) Maintenance & Troubleshooting

A catch basin is only as good as its maintenance routine. The goal is to keep debris from blocking the grate openings and outlet. If you’re using a sediment bucket, cleaning it on a schedule can significantly reduce downstream line problems.

Recommended maintenance routine

  • After storms / weekly (busy sites): clear leaves and trash from the grate.
  • Monthly: remove grate (when safe), clean out sediment and inspect the outlet area.
  • Quarterly: verify downstream line is flowing; cleanout/jet if sediment is accumulating.

Fast troubleshooting

  • Ponding at the grate: blocked grate, basket full, outlet restriction, or insufficient downstream slope.
  • Water bypassing the basin: basin not at low point or surface grading not directing flow to the inlet.
  • Recurring clogs: add sediment control, increase cleaning frequency, or review outlet size/pipe layout.

7) Case Study: Loading-Area Trench Run Upgrade Using a Z887 Catch Basin

Project type: Distribution facility loading area with trench drain run feeding storm piping

Problem: Standing water during storms + frequent clogs from sediment and pallet debris

Root cause (found on site): underserviced collection point + debris entering the outlet line and settling at a downstream elbow

Solution approach

  • Added a dedicated collection/transition point at the end of the trench run using a Z887-style catch basin configuration.
  • Selected a load-appropriate grate class for the service area traffic pattern.
  • Improved sediment control (routine cleanout + sediment capture strategy) before water entered the outlet line.
  • Re-established final grade so water reliably entered the basin instead of bypassing during heavy flow.

Results

  • Noticeably less ponding in the loading lane after storms
  • Reduced emergency cleanouts (maintenance shifted to scheduled service)
  • Improved long-term stability of the frame area by ensuring proper support and encasement

Note: This case study reflects common field outcomes when basin placement, grate selection, and debris control are addressed together.

8) FAQ (Accordion)

Click a question to expand.

What is the Zurn Z887-24-HD catch basin used for?
It’s used as a collection and transition structure for surface runoff and trench drain flow. It helps gather water in one location and direct it into storm piping through end or bottom outlet adapters.
Why use an HDPE catch basin instead of concrete?
HDPE is corrosion-resistant and doesn’t absorb water, which can help in wet or freeze/thaw environments. It’s also lightweight, which can reduce handling time on site (final performance still depends on correct installation and concrete support).
How do I choose the right grate load class?
Match the grate class to the traffic/loading where the basin will be installed. Pedestrian areas often use lower classes, while drive lanes and heavy service areas may require higher classes. When in doubt, use the project engineer’s loading requirements.
End outlet or bottom outlet—what’s better?
Neither is universally “better.” Bottom outlets often simplify vertical connections to piping below, while end outlets can be useful when routing laterally. The best choice depends on pipe layout, slope, and conflicts below grade.
What causes most catch basin problems after installation?
The most common issues are incorrect elevation (not at the true low point), debris accumulation, and poor concrete support around the frame area—leading to movement and cracking.
How often should a catch basin be cleaned?
High-debris sites should be checked after storms and cleaned monthly. If a sediment bucket is used, clean it before it overfills so debris doesn’t migrate into the outlet line.

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