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Can a pressure-compensating showerhead stay within the local flow cap?
A showerhead’s rated gallons per minute and how the spray feels aren’t quite the same question. I’m curious how much pressure variation a pressure-compensating design can handle while still giving a usable spray, compared with a simpler model rated at the same flow.
When checking compliance, should the marked flow rate be compared with the local limit as tested under specified conditions, or can a restrictor or compensating feature change how that limit applies? I’d also like to know whether local rules set a specific test pressure or require particular labeling. A higher-flow head might feel better, but I wouldn’t want to assume it’s allowed just because the pressure varies.
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Pressure compensation can help keep flow steadier as supply pressure changes, but only within the range the particular head is designed for. That doesn’t guarantee a particular spray feel: the spray pattern and nozzle design matter too. A simpler head may feel more noticeably different as pressure changes. For an exact comparison, look for that model’s tested performance range rather than assuming the rated flow predicts how it will feel.
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