The Theramax 6500-540 Leg Seal Plate is a durable wet-end replacement component designed for use in Sundance, Theramax, and Theraflo spa pumps. It serves as the rear seal plate, providing a secure mounting surface and alignment for the pump’s wet end and mechanical seal assembly.

• Function — Acts as the rear housing for pump internal seals and impeller assembly, ensuring the mechanical seal stays properly positioned and water is contained within the pump’s wet end.
• Direct Replacement Fit — OEM replacement for Sundance, Theramax, and Theraflo pumps (48-frame designs) manufactured June 2009 and newer.
• Durable Construction — Designed to withstand continuous water exposure, heat, and chemical environments typical of spa operation.
• Critical Pump Component — Essential part of the wet end assembly; supports the mechanical seal and helps prevent leaks and loss of prime.
• Compatibility — Compatible with Sundance®, Theramax®, and Theraflo® spa pumps using 48-frame motors (post-2009). Always verify your exact pump model and frame size before ordering to ensure correct fit.
• Part no. 6500-540

Why choose this product?

This seal plate is a key structural and sealing element in your pump. Replacing a worn or damaged plate helps prevent water leaks around the pump wet end, maintain proper mechanical seal performance, ensure the pump holds prime and operates efficiently, and extend the life of other wet end components such as the impeller and shaft seal. Replacing the 6500-540 seal plate during wet end overhauls or when leaks occur restores proper pump integrity and helps avoid more costly failures down the line.