Middle Atlantic Rectangular PVC BOX Adjus - 880MPA

Middle Atlantic 880MPA Rectangular PVC Floor Box Adjusting Ring

The Middle Atlantic 880MPA is a rectangular PVC adjusting ring designed for the ModuLink 880MP Series concrete floor box system. At 4 inches wide, 1.5 inches tall, and 5.38 inches deep, this ring provides the height-adjustment interface between a recessed concrete floor box and finished flooring — letting installers fine-tune the box elevation to match tile, carpet, or poured concrete surfaces without cutting or shimming. TAA compliance means it qualifies for federal procurement and government facility deployments where country-of-origin requirements apply.

Overview

Floor box installations in commercial environments rarely land at the perfect finished-floor height on the first pour. The 880MPA addresses that reality directly: it slots into the 880MP Series floor box and adds 1.5 inches of vertical adjustment range, keeping the box face flush with the finished surface. The compact 4 x 5.38-inch footprint matches the 880MP Series footprint, so no additional cutout work is needed. PVC construction resists moisture and the mechanical stress of foot traffic loads that concrete-embedded boxes routinely see.

Key Features

• TAA Compliant: Qualifies for GSA schedules and federal/state contracts where Trade Agreements Act sourcing is required — relevant for government buildings, courthouses, and military facilities where floor-level power and data distribution is common.
• 1.5-Inch Height Adjustment (3.8 cm): Provides enough vertical range to accommodate standard tile and carpet thicknesses without a second concrete pour or box replacement — reduces rework cost on multi-trade construction projects.
• 4 x 5.38-Inch Footprint (10.2 x 13.7 cm): Dimensionally matched to the 880MP Series floor box, so it drops in without modification to the surrounding concrete or conduit stub-ups.
• PVC Construction: Resists corrosion and moisture intrusion in slab-on-grade installations where ground moisture can degrade metal components over time.

Integration and Compatibility

The 880MPA is engineered specifically for the Middle Atlantic ModuLink 880MP Series floor box system. Verify the specific 880MP Series model in your installation before ordering — the adjusting ring is dimensionally matched to that family and is not a universal fit for other manufacturers' floor boxes. For help selecting the correct adjusting ring depth or compatible cover plates, consult a floor box accessories reference or the ModuLink series documentation.

Frequently Asked Questions

Q: Is the Middle Atlantic 880MPA TAA compliant?

A: Yes. The 880MPA is TAA compliant, making it eligible for federal government procurement under GSA schedules and contracts requiring Trade Agreements Act compliance.

Q: What are the dimensions of the 880MPA adjusting ring?

A: The 880MPA measures 4 inches wide (10.2 cm), 1.5 inches tall (3.8 cm), and 5.38 inches deep (13.7 cm).

Q: Which floor box series does the 880MPA work with?

A: The 880MPA is designed for the Middle Atlantic ModuLink 880MP Series rectangular concrete floor boxes. It is not confirmed as compatible with other manufacturers' floor box systems.

Q: What material is the 880MPA made from?

A: The 880MPA is a PVC (polyvinyl chloride) adjusting ring, which provides moisture and corrosion resistance suitable for concrete slab installations.

Karl Wilson

The 880MPA solves a problem that every integrator who has done a concrete floor box rough-in knows well: the finished floor never lands exactly where the drawings said it would. That 1.5-inch adjustment range on the 880MPA is the margin that keeps you from having to jackhammer the slab or build a raised platform to flush the box face.

Technical Highlights:

• 1.5-Inch Height (3.8 cm): Covers the typical variance between rough slab and finished floor across tile, low-pile carpet, and polished concrete — the three most common commercial finishes where floor boxes appear.
• 4 x 5.38-Inch Footprint: Dimensionally matched to the 880MP Series, so the ring drops straight in — no re-cutting the slab opening or repositioning conduit stubs.
• TAA Compliance: Matters on government and education projects where every component on the bill of materials may be subject to country-of-origin review during procurement audit.

Deployment Considerations:

• Confirm the specific 880MP Series model number in your floor box schedule before ordering — the 880MPA is family-specific, not a universal adjusting ring for other brands or series.
• The 1.5-inch adjustment range covers most standard flooring thicknesses, but if your finished floor exceeds that delta from rough slab, you will need to evaluate whether a deeper variant or alternative approach is required before the concrete sets.

The 880MPA is the right call on commercial office, government facility, and conference center projects using the ModuLink 880MP Series, where TAA compliance is a procurement requirement and finished-floor height variance needs to be resolved without structural rework.