Determining the correct Delta shower cartridge requires identifying your valve's series number and handle configuration. If your shower features a single handle that rotates for temperature and pulls for volume, it is likely a Monitor 13 or 14 series requiring the RP46074 cartridge. If it utilizes a dual-handle or dual-control ring system for independent volume and temperature adjustments, it corresponds to the 17 series. Checking the trim plate markings or removing the old cartridge for direct comparison ensures an exact match.
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