KAIYIV 4-Pcs Backflow Protector for Spectra S1/S2/9 Plus – Compatibility Kit

Overview

Meet the KAIYIV 4-piece backflow protector kit, designed to work with Spectra S1, S2, and 9 Plus pumps. This aftermarket option aims for a snug, trouble-free interface, with quick setup and durable performance you can rely on during busy pumping days.

Note: these are not original Spectra replacement pump parts, but they are tested for compatibility and have the potential to deliver consistent operation with your device.

Key benefits

• Precise, tool-free fit that reduces setup time
• Multi-layer seal design helps minimize reverse milk flow and keep bottles clean
• Plug-and-play installation snaps into place without tools
• Durable materials resist wear and stay flexible for reliable sealing
• Compact, portable design travels easily for home or away pumping
• Includes four backflow protectors for ready replacement

What you can expect in daily use

During busy mornings or late nights, the interface is designed for quick seating and predictable results. The small form factor makes it easy to slip into a bag or carry with you, supporting pumping on the go and reducing setup friction.

How it works

Each piece uses a multi-layer seal and elastic materials designed to stay reliable across cycles. When assembled with your Spectra pump, the backflow blocker sits between the bottle and the pump, providing a barrier that helps keep the milk path clean and reduces the chance of backflow into the pump.

What’s in the kit and care tips

• 4 backflow protectors
• Clear, visible design for quick verification
• Compatible with Spectra S1, S2, and 9 Plus models
• Not Original Spectra replacement parts

Care tips: keep components dry when not in use, inspect seals regularly, and replace parts as needed to maintain performance.