Waterway Super Hi-Flo, 3-1/4"hs, 2-1/2"s, 180gpm, White (640-3850)

Waterway Super Hi-Flo High Flow Suction is a purpose-built solution for portable spas that demands reliable turnover and uncompromised safety. Designed to deliver strong, consistent suction, this unit is Virginia Graeme Baker Compliant to support entrapment-prevention standards while maximizing performance.

With a total open area of 9.02 square inches, it offers robust flow capacity without sacrificing safety. For portable spas, the rated flow is 180 gpm, enabling rapid water circulation and efficient filtration to keep your spa water sparkling and evenly heated.

This is a complete assembly, ready to install, featuring a straight hole size of 3-1/4" and a cover diameter of 5-3/16". The plumbing connection size is 2-1/2" Slip, and the unit arrives in a clean white finish that blends seamlessly with most spa interiors. Wall flow rate is 180 gpm, while floor flow rate is not applicable for this configuration.

Key specifications

• Flow rate: 180 gpm (portable spas only)
• Total Open Area: 9.02 sq in
• Hole size: 3-1/4"
• Cover diameter: 5-3/16"
• Plumbing connection: 2-1/2" Slip
• Color: White
• Connection type: Complete assembly, suction fitting
• Manufacturer: Waterway

Who it's for and common use cases

The Waterway Super Hi-Flo is ideal for homeowners upgrading portable spa systems, technicians performing spa service, or contractors handling spa renovations. It’s particularly well-suited when upgrading to a higher-flow, safety-compliant suction without a complicated install process. If you need reliable 180 gpm performance in a compact, ready-to-install package, this suction fits the bill.

Practical notes and installation tips

• Match the 3-1/4" hole to the spa’s cutout and ensure the 5-3/16" cover sits flush for a watertight seal.
• Use standard 2-1/2" slip fittings to secure the connection and prevent leaks.
• Keep the 9.02 sq in open area clear of debris to maintain optimal flow and filtration efficiency.
• Verify compatibility with your spa’s safety requirements and filtration setup to leverage the full 180 gpm performance safely.