4" Schedule 40 PVC Coupling, White, 429-040

429-040 4" Slip x Slip Coupling PVC SCH 40

Name: 429-040 4" Slip x Slip Coupling PVC SCH 40
SKU: 429-040
Price: 5.33 USD
Availability: InStock

SKU:

429-040

UPC:

25528718404

Availability:

Typically ships within 24 hrs

$5.33

The 4" Slip x Slip Coupling PVC SCH 40 (Part #429-040) connects two sections of 4" pipe in a straight line, forming a permanent, watertight seal through solvent welding. Made from rigid, corrosion-resistant PVC, this coupling withstands pressure up to 150 psi and temperatures up to 140°F.

Ideal for large-scale water distribution, irrigation, and wastewater applications, it offers a durable, maintenance-free solution for professional and DIY plumbing projects alike. Certified to ASTM D1784 and NSF standards, this fitting delivers consistent performance in both above-ground and underground systems.

Nominal Pipe Size: 4"

Schedule: 40

End Type: Slip x Slip

Max Service Temp: 140 F

Listings: NSF Safe for potable water applications

Standards: ASTM D1784

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Width:

5.03 (in)

Height:

4.25 (in)

Depth:

5.03 (in)

Condition:

New

Current Stock:

Quantity:

Adding to cart… The item has been added

Technical Specifications

Nominal Pipe Size: 4"
End Type: Slip x Slip (Socket x Socket)
Material: Rigid PVC (Polyvinyl Chloride)
Schedule: 40
Color: White
Maximum Service Temperature: 140°F (60°C)
Pressure Rating: 150 psi @ 73°F (typical for Schedule 40 PVC)
Standards: ASTM D1784
Listings: NSF certified for potable water applications
Part Number: 429-040
Product Family: Schedule 40 PVC
Carton Quantity: 5
Pallet Quantity: 400
Size: 4"

This 4" PVC slip coupling is built for high-strength, solvent-welded connections, providing a secure and reliable fit for large-diameter piping systems. Each fitting meets strict ASTM and NSF standards for performance, quality, and safety.

Typical Applications

The 4" Schedule 40 PVC Slip Coupling is designed for durable, leak-free pipe connections in a wide range of applications, including:

Water distribution systems for residential, commercial, and municipal use
Irrigation and agricultural setups requiring corrosion-resistant fittings
Industrial plumbing and wastewater systems where pressure and temperature consistency are critical
Utility and construction projects that demand strong, permanent joints

Rigid PVC construction supports long-term resistance to chemical corrosion, pressure fluctuations, and UV exposure — outperforming metal alternatives in many environments. However, please note that this coupling is not intended for compressed air or gas use.

Installation & Handling Tips

For top-tier performance and watertight seals, carefully follow these steps for installation:

Cut pipe squarely and deburr edges for an exact fit.
Clean pipe and socket surfaces to remove dust, oil, or residue.
Apply PVC primer, followed by a thin, even layer of ASTM D2564-approved solvent cement.
Insert pipe fully into the socket with a ¼-turn twist to distribute cement evenly.
Hold for several seconds, then wipe excess cement and allow to cure (15 minutes handling, two hours before testing).
Store fittings in a cool, dry location to avoid UV damage before installation.

When you prioritize proper preparation and bonding, you can count on years of reliable service from each coupling.

Why Choose Maxx Supply?

At Maxx Supply, we combine industry-grade performance with cost-saving efficiency:

All Schedule 40 PVC fittings are precision-engineered for secure, leak-free joints.
Certified under NSF and ASTM standards for potable water and structural integrity.
Bulk pricing, fast shipping, and nationwide fulfillment make sure you get what you need swiftly.
Trusted by contractors, plumbers, and irrigation specialists for reliability and value.

Our team provides expert support and a robust catalog of compatible fittings, valves, and accessories, making Maxx Supply your trusted source for all plumbing components.