Diffuser extension
Diffuser extension. Guides the flow through the hydraulic section around the impeller. The correct design and an undamaged shape are important for proper pump operation.
Part code: 2921151105.
Diffuser extension
Guides the flow through the hydraulic section around the impeller. The correct design and an undamaged shape are important for proper pump operation.
Advice from a pool technician
Check the model, rating and any production-date distinction in the name. Earlier and later versions of the same range may use different designs.
When to replace this part
Replace a cracked, distorted or mechanically damaged diffuser. Inspect the impeller and diffuser seal at the same time.
Identification and compatibility
Diffuser extension
Catalogue code: 2921151105
Position in the relevant exploded view: BADU Top II / Bettar 8, 12, 14: 511; Bettar Top S II 6–14: 511
Match the full code and design to the original part. A drawing may cover several pump ratings; inclusion in a range does not mean every part fits every model. The named component or assembly is supplied; other items shown in the exploded view are not automatically included.
Replacement and checks
Disconnect the pump from the power supply, prevent restart and release system pressure according to its manual before opening it. Clean the mating surfaces and inspect adjacent components. Reassemble according to the specific pump instructions. Prime and vent the pump before restarting, never run it dry, and check the repaired area for leaks.
Location in the assembly
The original exploded view is an assembly illustration. Use the position and part code above to identify the item.
Product rating
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Discussion
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