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French Drain Man
3 Inch Tie-in to 4 Inch Main Wye
3 Inch Tie-in to 4 Inch Main Wye
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$32.00
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3 Inch Tie-in to 4 Inch Main Wye
New! EXTRA Heavy-Duty 4" Wye with 3" Tie-In. Built for durability and reliability, this fitting is the French Drain Man Team’s preferred way to bring a 3½" lateral into a 4" main line—without choking flow.
The 4" Wye body maintains smooth, efficient water movement in the main line, while the included 3" female coupler provides a secure, leak-resistant connection for your 3" branch. The result: clean transitions, minimal turbulence, and a pro-grade tie-in that stands up to real-world loads.
Trust the choice of professionals—choose our EXTRA Heavy-Duty 3" Tie-in to 4" Main Wye for your next drainage project.
Why Pros Choose It
- Purpose-built tie-in: Integrates a 3" lateral line to a 4" main without bottlenecks.
- High-flow geometry: Wye design preserves main-line velocity and reduces turbulence.
- Secure 3½" connection: Includes a 3" female coupler for a snug, dependable fit.
- EXTRA heavy-duty construction: Engineered for buried installations and tough job-site conditions.
- Time & labour saver: Faster, cleaner tie-ins mean less trench time and fewer callbacks.
What’s Included
- (1) EXTRA Heavy-Duty 4" Wye
- (1) 3" Female Coupler (for the lateral tie-in)
Compatibility
- Main line: 4" (compatible with FDM 4" systems and most 4" drainage lines)
- Lateral tie-in: 3" (compatible with FDM 3" lines)
Typical Uses
- Tying 3" downspout runs into a 4" yard drain
- Adding new branches to existing 4" mains
- Optimising system flow where T-fittings would create turbulence
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