Bushing, Spigot x Socket PVC Schedule 40 6" x 1-1/2" (437-527)

The 6" x 1-1/2" PVC Schedule 40 Reducer Bushing Spigot x Slip (437-527) provides a direct, large-reduction size transition from a 6" socket fitting to a 1-1/2" pipe continuation in a single fitting, eliminating the need to stage multiple intermediate reducer bushings or fittings in series to achieve the same result. Manufactured from rigid white PVC conforming to ASTM D1785, this bushing is suited for the pressure ratings, chemical resistance, and installation demands of commercial, municipal, and industrial piping systems built on Schedule 40 PVC.

The spigot (SPG) end is sized to the outside diameter of 6" Schedule 40 pipe, allowing it to insert directly into any standard 6" PVC socket fitting, coupling, tee, cross, or valve body as the male solvent-weld member of that joint. A standard Schedule 40 solvent cement joint at the spigot end creates a permanent, pressure-rated connection into the larger fitting. The opposite end is a 1-1/2" slip (socket) outlet, accepting standard 1-1/2" Schedule 40 or Schedule 80 PVC pipe via solvent cement and continuing the reduced pipe run from that point forward.

The 6" to 1-1/2" size combination represents an unusually large four-and-a-half nominal size reduction—among the most aggressive step-downs available in the Schedule 40 PVC bushing range. This makes the 437-527 highly specific in its application: it is not a general-purpose line reduction for flow-carrying mains, but rather the correct fitting where a large-diameter socket fitting must transition directly to a small-diameter auxiliary, service, or instrumentation connection. Typical uses include tank drain outlets where a large-diameter tank boss or socket fitting transitions to a small-diameter drain or vent line, manifold assemblies where a 6" header socket must feed a 1-1/2" chemical injection or monitoring branch, and equipment connections where a large socket port interfaces with a small-diameter service line.

Using a single bushing to achieve this full reduction rather than staging two or three intermediate bushings in series keeps the assembly compact, reduces the number of solvent-weld joints in the reduction path, and minimizes the axial length added to the fitting assembly at the transition point. In tank, vessel, and manifold configurations where the transition from large to small occurs at a fixed fitting port rather than in open pipe, this single-fitting approach is both cleaner and more structurally sound than a multi-bushing stack.

Schedule 40 construction is appropriate for standard-pressure commercial and municipal applications where the elevated wall thickness of Schedule 80 is not required by specification. White PVC delivers broad chemical resistance to acids, bases, salts, and a wide range of commercial and industrial process fluids. For higher-pressure service or more chemically aggressive applications, refer to the Schedule 80 equivalent in the 837-series.

Specifications:

Industries & Applications:

• Water & Wastewater Treatment — Tank drain and vent outlet transitions where a large-diameter tank boss or socket fitting must connect to a 1-1/2" drain, vent, or overflow line at pump stations, chemical storage tanks, and treatment facility vessels
• Chemical Processing — Chemical storage tank and process vessel outlet fittings where a 6" socket port transitions to a 1-1/2" chemical drain, sample, or vent line in a single compact bushing at the vessel connection point
• Industrial Manufacturing — Process manifold and header assemblies where a 6" socket fitting must branch or transition to a 1-1/2" auxiliary service, monitoring, or instrumentation line without a multi-bushing reduction stack
• Irrigation & Agriculture — Large tank or reservoir outlet transitions on pump station sumps, chemical mixing tanks, and storage vessels where a large socket outlet connects to a 1-1/2" fill, drain, or supply line
• Municipal Infrastructure — Storage tank, surge vessel, and metering vault outlet connections where a 6" socket port must interface with a 1-1/2" service or instrument line at water distribution and treatment facilities
• Aquaculture & Aquatics — Sump, reservoir, and filter vessel drain and overflow transitions where a large socket outlet on a tank or vessel body connects to a 1-1/2" drain or return line in a recirculating system
• Commercial Plumbing — Large-diameter commercial drainage and pressure system fittings where a 6" socket port must transition to a 1-1/2" service connection, cleanout branch, or auxiliary outlet in a compact single-fitting step-down