LAVATORY REPAIR Section 12 - Lavatory Repairs Replacement Solenoid Guide For Chicago Hytronic Faucets Replacement Solenoid Guide Over the years, the HyTronic housing and solenoid have undergone several improvements. This may lead to some confusion about which replacement parts to use when repairing these faucets. Please use this guide to identify your HyTronic model and the correct solenoid replacement part. 3rd Generation White plastic valve body with black solenoid and white bonnet Removal Steps Shut off water supply and remove spout: * Step 1 Unplug solenoid wire connectors * Step 2 Pull battery holder away from solenoid bonnet * Step 3 Remove bonnet retainer screws and retainer * Step 4 Using pliers, pull up to remove solenoid 1 Item Cat.# 40136 OEM# 242.980.AB.1 Description 3rd Generation White Plastic Valve Body With Black Solenoid And White Bonnet 40136 Valve body shown for reference purposes only 4th Generation Brown plastic valve body with black solenoid Removal Steps Shut off water supply and remove spout: * Step 1 Unplug solenoid wire connectors * Step 2 Unscrew solenoid to remove 1 Item Cat.# 37409 OEM# 243.152.AB.1 Description 4th Generation Brown Plastic Valve Body With Black Solenoid 37409 Valve body shown for reference purposes only MARK'S PLUMBING PARTS WWW.MARKSPP.COM 12-129https://www.markspp.com/Catalog/Detail/5 https://www.markspp.com/Catalog/Detail/6 https://www.markspp.com/Catalog/Detail/190565 https://www.markspp.com/Catalog/Detail/190565 https://www.markspp.com/Catalog/Detail/191159 https://www.markspp.com/Catalog/Detail/191159 http://WWW.MARKSPP.COM