Raypak 403A/405A Tube Bundle (004674F) hergaelectric A complete whirlpool-style jet assembly

A complete whirlpool-style jet assembly can be one of the best ways to restore both performance and visible quality in a spa seat

this heater helps restore reliable

Protecting plumbing

It is especially useful when the old valve has become stiff

Smaller panels can feel cluttered when the overlay is worn

Raypak 403A/405A Tube Bundle (004674F) hergaelectric A complete whirlpool-style jet assemblyThe Raypak tube bundle is designed for compatible 403A and 405A heater applications where the supported heat transfer assembly needs replacement. A tube bundle is useful because it forms one of the core internal heating sections of the heater, helping transfer heat effectively into the water system. This replacement is especially useful when the original bundle is leaking, scaled, damaged, or no longer dependable. Matching the correct tube bundle