Fernco Schedule 40 4 in. Compression x 4 in. Hub PVC Bushing provides a reliable, field-ready transition between a 4" compression connection and a 4" hub connection on standard Schedule 40 PVC drain and sewer piping. Built for practical installs, this lead-free bushing helps you repair or modify piping runs without unnecessary complexity, delivering a secure seal on the compression side and a precise slip-fit hub on the other.
Why this 4x4 PVC bushing stands out
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Dual-connection versatility: one end is a dependable compression fit, the other a 4" hub slip connection, making it ideal for transitioning between different pipe ends in tight spaces.
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Schedule 40 PVC compatibility: designed specifically for standard drain and sewer piping indoors or underground, in accordance with common PVC system practices.
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Lead-free construction: safe for use in drainage applications where materials may come into contact with potable or non-potable systems.
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Compact, simple installation: helps reduce installation time in renovation or repair projects; no heavy adapters needed for compatible ends.
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Single-unit practicality: a single-piece bushing that eliminates the need to piece together multiple fittings for a straightforward transition.
Ideal use cases
Use this Fernco bushing when you need to connect a 4" compression pipe to a 4" hub in drain and sewer runs. It’s particularly useful for:
- Repairs or retrofits in existing PVC drainage networks where a hub-to-compression transition is required
- Underground or crawlspace installations where a compact, reliable joint improves access and serviceability
- Permanent repairs in new installations where a secure, one-piece transition reduces potential leak points
How it works and installation tips
Prepare the ends: ensure the compression side is seated cleanly and the hub end is free of burrs or debris. For the compression connection, tighten the compression nut to create a snug, leak-resistant seal. For the hub end, insert into the corresponding PVC hub and, as appropriate for your system, complete the connection with standard hub-to-pipe practices (e.g., cementing the hub where required by your local code and installation method).
Tip: verify alignment before final tightening, and test the assembly with a gentle pressure or air test according to local code requirements to ensure there are no leaks.
Specifications at a glance
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End 1: 4" compression
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End 2: 4" hub
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Material: PVC
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Schedule: Schedule 40
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Product type: Bushing
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Lead content: Lead-free
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Maximum pressure: 4.3
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Application: Drain and sewer pipe
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Certification notes: IAPMO certified: No; NSF listed: No
Who will benefit
Professional plumbers tackling complex PVC drainage runs will appreciate the straightforward transition this bushing offers. DIYers restoring older homes or performing preventative maintenance on irrigation or drainage lines will also find it a practical, user-friendly solution. It’s a solid choice when you need a dependable, single-component adapter that reduces risk and speeds up corrections in 4" PVC systems.
