This shows a simple step by step guide to servicing the cartridge used in the 1500 series. The steps will show you how to remove the cartridge from the valve body, break the cartridge down and replace the seals. This particular video shows the 1500-2 cartridge, but the principles are generic across the range.
The cartridge for this product is the SK1500-2/SK1503-2LP
The seal kit for this product is the SK1500-1
The thermostat for this product is the 740012
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