Pentair ETi 250/400 Pressure Relief Valve (475618)

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Using the right replacement part matters during pool and spa service. Pentair ETi 250/400 Pressure Relief Valve (475618) supports a focused repair where fit, function, and reliabil ity are important. A proper pressure relief valve is a critical safety and service component on ETi 250 and ETi 400 heater systems, helping relieve excess pressure during operation. It is useful when the existing component shows wear, damage, age-related failure, or performance issues in the larger pool or spa system. Made for ETi heater pressure-management repairs Supports safer heater operation and protection against pressure-related stress Check thread fit, relief rating, and heater compatibility before installation Use part number to verify fit Before installation, compare the existing part number, dimensions, and system configuration. A careful match helps protect surrounding equipment and supports proper operation. Show more