Pumps in Parallel or Series

Two identical pumps added in parallel double flow at fixed head; added in series double head at fixed flow (against a flat enough system curve).

Pumps

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This calculator requires JavaScript to compute its result. The formula, symbols, and regulatory sources are shown in the Formula section below.

Formula, assumptions, and limits

Q_\text{parallel} = n \cdot Q_1, \quad H_\text{series} = n \cdot H_1

Symbol	Meaning	Unit
$Q_1$ , $H_1$	Single-pump duty-point values	m³/h, m
$n$	Number of pumps

Source: Hydraulic Institute - Centrifugal pumps

Two identical pumps added in parallel double flow at fixed head; added in series double head at fixed flow (against a flat enough system curve).