USA / Canada Show Options EN Show Options MARKETS SOLUTIONS PRODUCTS RESOURCES SUPPORT ABOUT US Site Search Home Solutions Irrigation Landscape Water Control FILTERS Skip to Results SORT BY BEST MATCH SHOW OPTIONS 1 item Fireman Switch Model# 156T4042A The 156T4042A Fireman Switch provides coordinated control for any pool/spa heater and filter pump. It is designed to turn OFF a gas fired pool/spa heater approximately 20 minutes before the filter pump shuts down. This eliminates the problem of pounding and knocking caused by overheated water and also reduces scale and lime deposits and extends service life of the heater. COMPARE Products Timer Controls In-Wall Controls Advanced Lighting Control Systems Photocontrols Sensors Surge Protection HVAC/R Weatherproof Covers Pool & Spa Helpful Links Contact Us Support Inquiry Careers Store Locator Intermatic Store Distributor Portal Sitemap Legal Policies Privacy Policy Terms And Conditions Warranty & Claims Recalls Subscribe to Our Newsletter SIGN UP Copyright © 2021 Intermatic Incorporated. All rights reserved. This website uses cookies to provide a better user experience. ACCEPT