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Leah SmithAug 10, 2025
Why does my Desmi NSL 200-415 have low capacity?
- ZZachary RogersAug 10, 2025
If your Desmi Water Pump has no or low capacity, several issues could be the cause. First, the direction of rotation might be wrong; change it to clockwise when viewed from the shaft end, following the arrow's direction. Another reason may be that the piping system or the pump itself is choked; in that case, clean or replace the piping system, or clean the pump. Suction line leaks could also be the problem; find and repair any leaks, ensuring the non-return valve is submerged. Finally, check if the suction lift is too high by referring to the data sheet Q/H curve and NPSH, or the pump and piping system may be wrongly dimensioned.
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