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Designed for intermittent duty only. Operates up to its rated by-pass pressure, then a by-pass valve opens for smooth flow. Performance varies with voltage: lower voltage = lower flow, higher voltage = higher flow. Always shut off power when leaving the RV unattended.
A spring-loaded diaphragm allows water from the discharge side back to the inlet side. For 55 psi models, the by-pass begins opening at around 40 psi and full by-pass occurs at about 62 psi. Adjustments to the switch or by-pass can affect pump shut-off. Warning: If full by-pass is reached before the shut-off setting, the pump will not shut off.
Regular checking and cleaning of the strainer, sanitizing, winterizing, and checking plumbing hardware and fittings for tightness are required. Lack of sanitizing can lead to scale build-up, causing low flow and potential pump cycling.
A variety of repair kits and parts are available for the 4XX9 Series Pumps. For specific part numbers and repair kits, refer to the provided list or consult the manufacturer's website.
Note: Always consult the RV manufacturer for sanitizing and winterizing procedures. For further information on specific models and repair kits, visit the manufacturer's website.
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