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The WATERWAY PLASTICS 310-1890B is a replacement wet end designed for pool and spa circulation pumps. The wet end is the hydraulic assembly of a centrifugal pump, housing the impeller, volute, and seal plate that move water through the system. This component is installed when the hydraulic section of an existing pump fails due to cracking, seal failure, or impeller damage, allowing the motor to be retained and reused. Pool service professionals and licensed plumbers typically handle this replacement as part of pump reconditioning work.
The 310-1890B wet end is suited for residential and light commercial pool and spa pump applications. It is installed in systems where the pump motor remains serviceable but the hydraulic components require replacement. This part allows technicians to restore full pump function without replacing the entire pump assembly, reducing material cost and equipment downtime on pool circulation systems.
Designed as an OEM-style replacement wet end for pool and spa circulation pumps. Consult the pump motor nameplate and existing pump documentation to confirm fitment before installation.
Installation should be performed by a qualified pool service professional or licensed plumber. Shut off all power to the pump at the circuit breaker and close isolation valves or drain the system before disassembly. Inspect the mechanical seal and O-rings during replacement and replace them as needed to prevent leaks. Follow local plumbing codes and the pump manufacturer guidelines when reassembling and returning the system to service.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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