{"id":20995,"date":"2023-01-20T10:50:33","date_gmt":"2023-01-20T17:50:33","guid":{"rendered":"https:\/\/scotthomeinspection.com\/?p=20995"},"modified":"2025-06-03T13:41:15","modified_gmt":"2025-06-03T19:41:15","slug":"what-is-a-tpr-valve-and-why-do-i-need-it","status":"publish","type":"post","link":"https:\/\/scotthomeinspection.com\/what-is-a-tpr-valve-and-why-do-i-need-it\/","title":{"rendered":"What Is A TPR Valve and Why Do I Need It?"},"content":{"rendered":"<div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-1 fusion-flex-container nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"--awb-border-radius-top-left:0px;--awb-border-radius-top-right:0px;--awb-border-radius-bottom-right:0px;--awb-border-radius-bottom-left:0px;--awb-flex-wrap:wrap;\" ><div class=\"fusion-builder-row fusion-row fusion-flex-align-items-flex-start fusion-flex-content-wrap\" style=\"max-width:1144px;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-0 fusion_builder_column_1_1 1_1 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:100%;--awb-margin-top-large:0px;--awb-spacing-right-large:1.92%;--awb-margin-bottom-large:0px;--awb-spacing-left-large:1.92%;--awb-width-medium:100%;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-text fusion-text-1\"><p>A <a href=\"https:\/\/www.nachi.org\/tpr-valves-discharge-piping.htm#:~:text=Temperature%2Fpressure%2Drelief%20or%20TPR,water%20tank%20exceeds%20safe%20levels.\" target=\"_blank\" rel=\"noopener\">TPR Valve<\/a>, or Temperature &amp; Pressure Release Valve, is a safety device located on a water heater or boiler.<\/p>\n<p>As indicated in its name, this apparatus is designed to release water if the temperature or pressure in a water tank exceeds safe levels. They are critical components of hot water systems and play an important role in ensuring safety.<\/p>\n<h3>Why Do I Need a TPR Valve?<\/h3>\n<p>When heat is added to water, the water vaporizes and expands. Expansion in an enclosed space, such as a water tank, leads to an increase in pressure.<\/p>\n<p>Without a way to reduce the pressure in the tank, it could continue to build, eventually resulting in a water tank explosion.<\/p>\n<p>Although they are rare occurrences, <a href=\"https:\/\/americanhomewater.com\/can-your-water-heater-explode\/\" target=\"_blank\" rel=\"noopener\">tank explosions<\/a> have been known to happen with defective or poorly maintained TPR valves.<\/p>\n<p><a href=\"https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2023\/01\/IMG_1254-scaled.jpg\"><img decoding=\"async\" class=\"wp-image-25720 aligncenter\" src=\"https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2023\/01\/IMG_1254-1024x768.jpg\" alt=\"\" width=\"807\" height=\"605\" srcset=\"https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2023\/01\/IMG_1254-200x150.jpg 200w, https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2023\/01\/IMG_1254-300x225.jpg 300w, https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2023\/01\/IMG_1254-400x300.jpg 400w, https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2023\/01\/IMG_1254-600x450.jpg 600w, https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2023\/01\/IMG_1254-768x576.jpg 768w, https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2023\/01\/IMG_1254-800x600.jpg 800w, https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2023\/01\/IMG_1254-1024x768.jpg 1024w, https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2023\/01\/IMG_1254-1200x900.jpg 1200w, https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2023\/01\/IMG_1254-scaled.jpg 1440w, https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2023\/01\/IMG_1254-1536x1152.jpg 1536w\" sizes=\"(max-width: 807px) 100vw, 807px\" \/><\/a><\/p>\n<p>While some thermal expansion is normal, excessive expansion can become dangerous very quickly. This is why that a two-inch brass fixture is so essential for in-home safety.<\/p>\n<p>When properly configured, a temperature and pressure release valve should release when the temperature reaches 210\u00b0F or 150 pounds per square inch (psi).<\/p>\n<p>In addition to preventing drastic increases in pressure, these safety valves also help to regulate temperature. Modern water heaters and boilers have thermostats that are meant to set a maximum water temp.<\/p>\n<p>But what happens when there is a faulty thermostat that does not properly regulate the temperature? What&#8217;s stopping scalding hot water from entering the home and potentially harming its inhabitants?<\/p>\n<p>In comes the TPR valve to save the day, yet again! Once the temperature reaches 210\u00b0F or higher, the valve will open to release the heat and cool down the water.<\/p>\n<h3>Don&#8217;t Forget Your Discharge Pipe!<\/h3>\n<p>A discharge pipe must also be attached to the valve. As depicted in the picture below, this is a pipe that extends downward to within 6 inches of the floor. When a TPR valve opens up, it will expel scalding hot water and\/or steam.<\/p>\n<p>This is obviously a dangerous scenario for anyone who might be close by. So the discharge pipe must be attached in order to safely redirect the hot water downward and away from any bystanders.<\/p>\n<p><a href=\"https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2023\/01\/Screenshot-2025-01-10-at-11.01.07\u202fAM.jpg\"><img decoding=\"async\" class=\"wp-image-25718 aligncenter\" src=\"https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2023\/01\/Screenshot-2025-01-10-at-11.01.07\u202fAM.jpg\" alt=\"\" width=\"493\" height=\"661\" srcset=\"https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2023\/01\/Screenshot-2025-01-10-at-11.01.07\u202fAM-200x268.jpg 200w, https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2023\/01\/Screenshot-2025-01-10-at-11.01.07\u202fAM-224x300.jpg 224w, https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2023\/01\/Screenshot-2025-01-10-at-11.01.07\u202fAM-400x536.jpg 400w, https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2023\/01\/Screenshot-2025-01-10-at-11.01.07\u202fAM.jpg 553w\" sizes=\"(max-width: 493px) 100vw, 493px\" \/><\/a><\/p>\n<h3>Stay On Top of Your Maintenance<\/h3>\n<p>One easy way to prevent water tank issues, is to stay on top of your maintenance. Manufacturers recommend testing the TPR valve at least once a year to ensure proper functionality and no leaks or defects.<\/p>\n<p>Of course, you can hire a pro to take care of these maintenance tasks. But for the DIY enthusiasts out there, <a href=\"https:\/\/www.thespruce.com\/maintain-a-water-heater-1824893\" target=\"_blank\" rel=\"noopener\">click here<\/a> for a step-by-step guide on how to test your TPR valve.<\/p>\n<p><a href=\"https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2023\/01\/Screenshot-2025-01-10-at-11.53.05\u202fAM.jpg\"><img decoding=\"async\" class=\"aligncenter wp-image-25722 size-full\" src=\"https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2023\/01\/Screenshot-2025-01-10-at-11.53.05\u202fAM.jpg\" alt=\"\" width=\"557\" height=\"742\" srcset=\"https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2023\/01\/Screenshot-2025-01-10-at-11.53.05\u202fAM-200x266.jpg 200w, https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2023\/01\/Screenshot-2025-01-10-at-11.53.05\u202fAM-225x300.jpg 225w, https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2023\/01\/Screenshot-2025-01-10-at-11.53.05\u202fAM-400x533.jpg 400w, https:\/\/scotthomeinspection.com\/wp-content\/uploads\/2023\/01\/Screenshot-2025-01-10-at-11.53.05\u202fAM.jpg 557w\" sizes=\"(max-width: 557px) 100vw, 557px\" \/><\/a><\/p>\n<h3>Home Inspections &#8211; Putting the Microscope on TPR Valves<\/h3>\n<p>During our <a href=\"https:\/\/scotthomeinspection.com\/\" target=\"_blank\" rel=\"noopener\">standard home inspections<\/a>, we pay very close attention for properly maintained boilers\/water heaters. We are always looking at TPR valves <em>and\u00a0<\/em>discharge pipes. If either of these devices is missing or defective, we will be sure to recommend immediate repair.<\/p>\n<p>The same goes for <a href=\"https:\/\/scotthomeinspection.com\/rental-inspection-services\/\" target=\"_blank\" rel=\"noopener\">Rental License Inspections<\/a>. Whether we are conducting a rental inspection in <a href=\"https:\/\/scotthomeinspection.com\/denver-rental-license-inspections\/\" target=\"_blank\" rel=\"noopener\">Denver<\/a> or <a href=\"https:\/\/scotthomeinspection.com\/boulder-rental-inspections\/\" target=\"_blank\" rel=\"noopener\">Boulder,<\/a> we are always checking for properly configured water tanks.<\/p>\n<p>Both city&#8217;s rental license programs make TPR valves and discharge pipes mandatory. (See <a href=\"https:\/\/www.denvergov.org\/files\/assets\/public\/business-licensing\/documents\/residential-rental-program-checklist-guidebook.pdf\" target=\"_blank\" rel=\"noopener\">Section 2.4<\/a> in the Denver Residential Rental Program Guidebook or <a href=\"https:\/\/bouldercolorado.gov\/media\/799\/download?inline=\" target=\"_blank\" rel=\"noopener\">Section 3<\/a> in the Boulder Rental Housing License Handbook.)<\/p>\n<p>At <a href=\"https:\/\/www.teamscott.com\/\" target=\"_blank\" rel=\"noopener\">Scott Home Services<\/a>, it is our priority to help families live in safe, healthy, and comfortable homes. So whether it comes to inspecting TPR valves or any other aspect of the home, we are happy to be of service!<\/p>\n<p>If you are in need of a <a href=\"https:\/\/scotthomeinspection.com\/inspection-services\/\" target=\"_blank\" rel=\"noopener\">home inspection<\/a> or <a href=\"https:\/\/scotthomeinspection.com\/rental-inspection-services\/\" target=\"_blank\" rel=\"noopener\">rental license inspection<\/a>, don&#8217;t hesitate to <a href=\"https:\/\/www.teamscott.com\/contact\" target=\"_blank\" rel=\"noopener\">contact us today!<\/a><\/p>\n<\/div><\/div><\/div><\/div><\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":18,"featured_media":25724,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4572,5136],"tags":[5207,5142,5206,5194],"class_list":["post-20995","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-back-to-basics","category-plumbing","tag-boiler","tag-plumbing","tag-tpr-valve","tag-water-heater"],"nelio_content":{"autoShareEndMode":"never","automationSources":{"useCustomSentences":false,"customSentences":[]},"efiAlt":"","efiUrl":"","followers":[18],"highlights":[],"isAutoShareEnabled":true,"networkImageIds":[],"permalinkQueryArgs":[],"series":[],"suggestedReferences":[]},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v18.1 (Yoast SEO v27.2) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ 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