Lasco Fittings 436050 5In MPT X SKT Male Adapter Schedule 40

Description

Westlake Pipe & Fittings 436050 5″ MPT x SKT Male Adapter

The Westlake Pipe & Fittings 436050 5″ Male Adapter – Long Body is a robust, high-performance PVC plumbing component engineered specifically to provide a reliable transition between threaded and solvent-weld systems in large-diameter piping assemblies. Manufactured by Westlake Pipe & Fittings (also marketed under Lasco Fittings), this adapter is designed to meet the needs of commercial, industrial, agricultural, and pool & spa applications where durability, chemical resistance, and ease of installation are critical.

At its core, this adapter combines a 5-inch Male Pipe Thread (MPT) connection on one end with a 5-inch socket (SKT) fitting on the other. This dual-ended design enables the adapter to bridge two fundamentally different joining methods: a threaded connection that screws into a female fitting or device, and a solvent weld (socket) end that joins directly with PVC pipe using PVC cement. Such versatility makes the 436050 adapter ideal in systems where a threaded component (like a valve, pump, pressure gauge, or mechanical device) must be integrated into a PVC pipeline without the need for transitional couplings or custom fabrication.

The adapter is molded from superior-grade polyvinyl chloride (PVC), a thermoplastic polymer renowned throughout the plumbing and construction industries for its exceptional chemical resistance, corrosion resistance, and structural integrity. PVC resists degradation from a broad spectrum of acids, bases, salts, and other corrosive media, which makes it suitable for environments where metal fittings would corrode prematurely. It also performs well in both indoor and outdoor settings, resisting UV-driven deterioration when properly supported.

This model conforms to Schedule 40 dimensions, meaning it is shaped to match standard Schedule 40 PVC pipe sizes – the most common specification used in general plumbing and irrigation systems. Schedule 40 is characterized by a balanced combination of wall thickness and internal diameter, offering dependable pressure handling while maintaining workability for installation and fabrication.

Unlike short-body adapters, the long-body configuration of the 436050 extends both the threaded and socket ends sufficiently to improve usability and performance. The elongated male thread section allows for secure engagement with a mating female thread, reducing the likelihood of cross-threading or shallow engagement that could compromise sealing and mechanical strength. The longer socket end affords better access for applying solvent cement and supports a deeper insert of the pipe into the fitting. Together, these design enhancements facilitate more reliable joints and improved load distribution.

While specific working pressures depend on pipe size and operating temperature, Schedule 40 PVC fittings are engineered to handle moderate pressures typical of plumbing and irrigation systems. PVC’s thermal limits place the maximum operating temperature at approximately 140 °F (60 °C), above which the material may soften and compromise performance. The adapter is rugged enough for most groundwater, pool, spa, and distribution line applications where temperatures remain within this range.

PVC is inherently resistant to many corrosive chemicals encountered in swimming pools, agricultural runoff, industrial drains, wastewater lines, and irrigation systems. This resistance extends the service life of the adapter far beyond that of many metal alternatives in corrosive environments, reducing maintenance costs and downtime.

PVC fittings like this adapter are significantly lighter than metal alternatives. This reduces handling effort, speeds installation, and minimizes stress on support structures and hangers. Despite the lightweight nature, PVC maintains high tensile and impact strength, ensuring the fitting can withstand mechanical stresses and vibrations that occur during pump operation or system cycling.

Westlake Pipe & Fittings is dedicated to helping contractors maximize efficiency and helping engineers design systems that entire communities can rely on.With manufacturing & distribution centers across North America, dedicated sales, technical services, specification engineers and customer support teams, our unparalleled service allows you to design, specify and install complete projects with confidence.

Westlake Pipe & Fittings 436050 5″ MPT x SKT Male Adapter Features:

• Engineered for service up to approximately 140°F and resistance to many chemicals
• Provides improved accessibility for solvent welding and thread engagement
• Precision-molded male threads for secure engagement with female threads
• Designed to mate with 5-inch IPS PVC pipe and threaded components
• Durable, corrosion-resistant polyvinyl chloride suited for fluid transport
• Ideal for pool, spa, irrigation, industrial, and plumbing systems
• Accepts plain-end PVC pipe for solvent-weld connection
• Simplifies installation compared to metal fittings

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