Bushing, Spigot x Slip (Flush Style) PVC Schedule 80 8" x 6" (837-585)

The 8" x 6" PVC Schedule 80 Flush Bushing (837-585) is a compact, two-diameter reducer fitting that steps down an 8" female socket port on any standard fitting to accept 6" Schedule 80 pipe — in a single solvent-welded component with no additional fittings, couplings, or adapters required. The spigot (male) end is machined to the 8" pipe OD, allowing it to insert directly into any standard 8" slip socket — tees, elbows, couplings, crosses, and other Schedule 80 fittings with 8" socket ports. The slip (female) end accepts 6" Schedule 80 pipe with standard PVC solvent cement for a permanent, pressure-rated bond at the reduced diameter.

The flush style designation is a critical profile distinction. Unlike a hex head bushing — which presents a raised hex collar that protrudes beyond the fitting socket face — the flush bushing sits fully recessed within the socket bore, its face terminating flush with or slightly below the fitting socket face. This low-profile geometry eliminates the clearance conflicts that protruding hex heads introduce in compact manifold assemblies, valve clusters, and multi-fitting arrays where adjacent piping, structural members, or nearby fittings constrain the available envelope around each socket port. For large-diameter piping at the 8" and 6" scale, where fitting bodies are inherently bulky and manifold assemblies are already space-intensive, the flush profile's contribution to a cleaner, tighter assembly geometry is practically significant.

The one-pipe-size step from 8" to 6" defines this bushing's specific application role. The 837-585 is the correct fitting wherever an 8" socket port must be reduced to serve a 6" pipe run — a common requirement at pump discharge manifolds transitioning to distribution headers, at reducing tee branch ports stepping down to secondary circuits, and at multi-port fitting assemblies where individual outlets serve circuits of varying sizes. The alternative to this single molded bushing is an 8" fitting plus a downstream 8" x 6" reducer coupling — adding a second fitting body, two additional solvent weld joints, and measurable additional length to the assembly. The 837-585 eliminates all of that, handling the full size transition directly within the existing socket port in a two-joint assembly.

Schedule 80 construction provides the wall thickness, elevated pressure ratings, and chemical resistance required in the industrial and process environments where 8" Schedule 80 systems are most commonly specified. The dark gray PVC color is the recognized industry identifier for Schedule 80, confirming at a glance during inspection or maintenance that the bushing maintains Schedule 80 specifications at the reduction point — not a lower-rated Schedule 40 component inserted into an otherwise Schedule 80 assembly. Manufactured to ASTM D2467 standards, the 837-585 delivers the dimensional precision required at both the spigot OD and the slip socket ID for reliable solvent weld engagement at both diameters.

Specifications:

Industries & Applications:

Chemical Processing & Industrial Manifold Assemblies Chemical processing headers and distribution manifolds built on 8" Schedule 80 fittings regularly require individual port reductions to 6" for secondary distribution circuits, equipment feed lines, and branch headers serving process units with 6" inlet connections. Inserting the 837-585 directly into the appropriate 8" socket port delivers the 6" connection at the manifold body without a downstream reducer coupling — eliminating a fitting, reducing joint count, and keeping the manifold assembly compact in congested mechanical spaces. The flush profile prevents the clearance conflicts that hex bushing collars create between adjacent ports in tight multi-outlet manifold configurations. Schedule 80 construction throughout maintains the chemical resistance and pressure integrity of the surrounding assembly at the reduction point.

Pump Station Headers & Distribution Manifolds Pump discharge manifolds are a primary application environment for this size bushing. An 8" pump discharge header frequently needs to serve 6" distribution circuits — zone supply mains, parallel pump circuit branches, storage tank fill lines, and secondary distribution runs — at individual manifold ports without changing the primary header size. The 837-585 inserted into the appropriate 8" tee or cross port delivers a 6" connection directly at the manifold body, eliminating a downstream reducer and keeping the pump station assembly compact in valve vault and mechanical room environments where fitting cluster geometry is constrained by structural clearances and access requirements.

Water & Wastewater Treatment Plant Piping Treatment plant process headers at 8" use reducer bushings at ports stepping down to 6" secondary circuits — filter backwash branch connections, recirculation loop supply lines, secondary clarifier distribution headers, and chemical dilution manifold outlets. A flush bushing at the socket port keeps the manifold compact and reduces joint count in process piping operating under continuous pressure and chemical exposure — where minimizing the number of solvent weld joints in the assembly reduces long-term leak probability and simplifies system inspection.

Industrial Cooling & Process Water Distribution Cooling water distribution manifolds and process water supply headers at 8" branch off to 6" equipment supply lines at heat exchangers, cooling towers, process skids, and large air handling units. Inserting a flush reducer bushing into the 8" manifold port rather than adding a downstream 8" x 6" reducer coupling eliminates a fitting from the cooling circuit branch assembly — a meaningful simplification in large industrial cooling systems with numerous branch connections off a common distribution header, where each eliminated fitting reduces the maintenance and leak monitoring burden over the system's service life.

High-Pressure Irrigation & Agricultural Distribution Large-scale agricultural and commercial irrigation systems running 8" Schedule 80 pump station manifolds branch off to 6" zone supply mains at individual manifold ports. A flush reducer bushing at the manifold port handles the 8"-to-6" transition directly at the fitting socket, eliminating a downstream reducer coupling from each zone branch connection in the manifold assembly. In pump station vaults with multiple zone outlets off a common header, eliminating a reducer coupling per zone branch meaningfully reduces the fitting count, joint count, and overall vault assembly footprint.

Mining, Mineral Processing & Heavy Industrial Process water distribution manifolds, reagent supply headers, and leach solution distribution assemblies in mining and mineral processing environments use reducer bushings at fitting ports stepping down to 6" branch circuits serving heap leach distribution laterals, solvent extraction unit supply lines, and process water secondary circuits. The all-slip Schedule 80 construction withstands the highly corrosive acids and caustic process solutions characteristic of hydrometallurgical operations, with the flush profile keeping manifold assemblies compact in the confined pipe galleries and processing structures where large-diameter mining piping is typically routed.

Municipal Infrastructure & Civil Engineering Projects Municipal pump stations, lift station discharge headers, and water distribution manifolds built on 8" PVC mains use reducer bushings at ports stepping down to 6" service laterals, zone supply mains, and equipment connections. The NSF/ANSI 61 certification confirms suitability for potable water contact in municipal water distribution applications, and the single-size-step reduction from 8" to 6" makes the 837-585 one of the more commonly specified bushing sizes in municipal infrastructure projects where 8" and 6" are both standard distribution main sizes.