Reducer Bushing, Spigot x Slip PVC Schedule 40 2" x 1/2" (437-247)

This 2" × 1/2" Schedule 40 PVC Bushing provides a five-step, all-solvent-cement size reduction from a 2" slip socket position directly to a 1/2" PVC pipe run in a fully solvent-welded Schedule 40 system. The 2" spigot end inserts into any standard 2" female slip socket fitting or coupling for solvent cement joining on the upstream side, while the 1/2" slip socket on the outlet end accepts standard 1/2" PVC pipe for solvent cement joining on the downstream side. Both connections are permanent, chemically fused solvent-cemented joints — no threaded interface is introduced at either end of the fitting.

Within the 437-series 2" inlet sub-run, the 437-247 makes the deepest available all-cement size transition — a five-step reduction from the 2" inlet to a 1/2" outlet, compared to the four-step reduction of the 437-248 (2" × 3/4"). Both share the same 2" spigot upstream end and the same all-cement, spigot × slip construction. The distinction lies entirely at the downstream outlet: the 437-248 presents a 3/4" slip socket outlet that serves the broad population of secondary supply runs, zone laterals, and equipment connection pipe runs where 3/4" capacity is appropriate. The 437-247 presents a 1/2" slip socket outlet — a five-step reduction that serves the specifically defined small-bore niche of chemical dosing supply lines, instrument supply branches, solenoid valve supply connections, pressure gauge line cemented pipe runs, and fine-bore secondary supply connections that draw from 2" primary distribution sockets at flow rates well below 3/4" capacity.

This 1/2" outlet application niche is the defining characteristic of the 437-247. At the 1/2" cemented pipe size, the downstream run serves chemical dosing and injection supply connections — where the dosing pump outlet connects to a 1/2" PVC pipe run that carries chemical solution to an injection quill or dosing point; instrument supply branches — where a 1/2" cemented PVC pipe run serves as the supply conduit to a monitoring station or gauge manifold assembly; solenoid valve supply lines — where the 1/2" cemented pipe run carries supply flow to a solenoid valve body with a 1/2" slip socket inlet; and fine-bore secondary supply connections in any system where the 2" primary distribution socket must supply a 1/2" pipe run. In each case, the entire downstream supply path is a cemented PVC pipe run — distinguishing the 437-247 from any 438-series equivalent at 2" × 1/2" where the downstream connection is a threaded component rather than a cemented pipe.

The 437-247 also has a direct parallel at the 3" inlet: the 437-333 (3" × 1/2", previously written) serves the same 1/2" all-cement outlet from a larger 3" upstream socket. Both deliver the same 1/2" cemented pipe connection downstream; the upstream inlet size and the system context differ. When the upstream socket is 2", the 437-247 is correct; when it is 3", the 437-333 applies.

The five-step reduction depth underscores the application specificity of the 437-247. Achieving the same 2"-to-1/2" all-cement transition without this bushing would require a sequence of reducing couplings, stepped bushings, or multiple adapter fittings — at least four intermediate fittings to step from 2" down to 1/2" in single-step increments. The 437-247 accomplishes the complete five-step transition at the 2" socket face in a single compact bushing body, reducing joint count, assembly length, and potential leak points to the minimum possible at the size transition position.

For installation, the upstream spigot joint must be made first — seating the bushing securely in the 2" receiving socket before the downstream 1/2" pipe joint is made. At the 2" spigot end, medium-body PVC solvent cement is appropriate; at the 1/2" outlet socket, standard-body cement is correct. Apply purple PVC primer to all mating surfaces at both joints before cementing. Allow full cure time at the upstream joint before handling or loading the downstream connection. The size differential between the 2" spigot and the 1/2" outlet socket is visually obvious, making socket identification straightforward — but confirming the 2" spigot end is oriented toward the upstream socket before cementing remains good practice.

Manufactured in white Schedule 40 PVC, this bushing delivers reliable performance across commercial, light industrial, and residential large-bore-to-small-bore transition applications. PVC's resistance to acids, bases, salts, chlorine, and common process fluids provides long service life where metal bushings would corrode or contaminate chemical dosing and instrument supply lines. NSF/ANSI 61 and NSF/ANSI 14 listings confirm suitability for potable water contact.

Rated to 280 psi at 73°F (governed by the 2" spigot end), this bushing handles standard pressure service across irrigation, commercial plumbing, pool and spa, water treatment, and light industrial applications. Two separate solvent-cemented joints must be made at installation — the spigot end into the receiving 2" socket, and the 1/2" downstream pipe into the bushing's outlet slip socket. For both joints, clean and dry all mating surfaces before application. Apply purple PVC primer to all mating surfaces at each joint. At 2", use medium-body PVC solvent cement on the spigot end; use standard-body cement at the 1/2" outlet socket. Apply a uniform coat to both mating surfaces at each joint before inserting. Hold each joint with a slight quarter-turn twist for 30 seconds. Make the upstream spigot joint first to seat the bushing before making the downstream pipe joint. Allow full cure time per the cement manufacturer's guidelines before pressurizing. Apply published pressure derating factors for service temperatures above 73°F.

Specifications:

Industries & Applications:

• Chemical Dosing & Injection Supply Lines — The defining application for the 2" × 1/2" all-cement bushing: transitions a 2" slip socket position on a primary distribution tee, cross, manifold fitting, or coupling socket directly to a 1/2" cemented PVC chemical dosing supply run in irrigation fertigation, pool and spa chemical treatment, water treatment chemical dosing, and commercial chemical handling systems where the downstream 1/2" pipe run carries chemical solution from the 2" distribution socket to a dosing injection point — a single bushing accomplishing the five-step size transition in place of a multi-fitting reducer sequence
• Commercial & Residential Irrigation — Fertigation & Chemical Injection — Transitions a 2" slip socket position on an irrigation mainline tee, cross, or manifold fitting to a 1/2" cemented pipe chemical injection supply run in residential, commercial, golf course, and agricultural irrigation systems where fertigation injectors, chemical metering pump connections, and injection assembly supply lines are 1/2" cemented PVC pipe drawing from the 2" primary mainline distribution socket
• Pool, Spa & Aquaculture Chemical Treatment — Reduces a 2" slip socket position on recirculation header tees, filter manifold fittings, and equipment distribution crosses to a 1/2" cemented chemical dosing supply run in residential and commercial pool and spa installations where 1/2" PVC cemented pipe carries chemical treatment supply — chlorine dosing, acid feed, or algaecide connections — from the primary 2" recirculation distribution socket to the chemical injection point
• Instrument Supply & Monitoring Branches — Transitions a 2" slip socket position on a primary distribution tee or coupling to a 1/2" cemented instrument supply pipe run in Schedule 40 systems where the 1/2" pipe delivers supply flow to a monitoring station, gauge manifold assembly, or analytical instrument connection via a cemented PVC pipe run rather than a threaded interface at the 2" distribution socket
• Water & Wastewater Treatment — Reduces a 2" slip socket position on process distribution tees, pump manifold fittings, and chemical distribution crosses to a 1/2" cemented secondary branch pipe run in light-duty municipal and industrial water treatment facilities where 1/2" cemented PVC pipe carries chemical dosing supply, sampling branch flow, or secondary instrument supply connections from the primary 2" distribution socket
• Commercial Plumbing — Small-Bore Branch Supply — Transitions a 2" slip socket position on a distribution tee branch, coupling socket, or manifold fitting to a 1/2" cemented small-bore branch supply run in commercial building water distribution and mechanical room systems where a 1/2" cemented PVC pipe carries small-bore supply flow — fixture supply, small equipment feed, or secondary monitoring branch — from the primary 2" distribution socket
• Light Industrial Process Piping — Provides a five-step all-cement size transition from a 2" slip socket position on a process distribution tee, coupling socket, or manifold fitting branch to a 1/2" cemented secondary pipe run in light industrial Schedule 40 systems where the 1/2" pipe carries secondary process supply, chemical dosing supply, or instrument connection flow from the primary 2" process distribution socket within the solvent-welded system layout