Raypak Tube Bundle [406A/407A Copper/Poly] (010062F) sgsinstruments A volute like this is

A volute like this is useful because it forms the chamber around the impeller and helps direct water through the pump

Matching the correct 2 inch slip configuration and included weir helps preserve intended fit and dependable filtration support

Confirm model compatibility before ordering

A lock ring like this is useful because it helps secure related components within the assembly

Raypak Tube Bundle [406A/407A Copper/Poly] (010062F) sgsinstruments A volute like this isThe Raypak Tube Bundle [406A 407A Copper Poly] is a replacement heat exchanger tube bundle kit for compatible Raypak 406A 407A pool and spa heater systems. The tube bundle is a central heat transfer component, allowing water to move through the heater while absorbing heat from the combustion process or heating assembly. This copper poly kit is typically used when the existing tube bundle is leaking, scaled, damaged, or no longer transferring heat