{"id":20432,"date":"2024-07-08T09:25:11","date_gmt":"2024-07-08T09:25:11","guid":{"rendered":"https:\/\/www.hdfire.com\/?post_type=product&#038;p=20432"},"modified":"2025-09-22T13:33:02","modified_gmt":"2025-09-22T13:33:02","slug":"pressure-gauges","status":"publish","type":"product","link":"https:\/\/www.hdfire.com\/products-solutions\/system-valves-accessories\/pressure-gauges\/","title":{"rendered":"Pressure Gauges"},"content":{"rendered":"<p><span style=\"font-weight: 400;\">HD Pressure Gauges (HDP-1 and HDP-2) are specifically designed for fire protection applications, offering high-precision pressure measurement and reliable performance in demanding environments. Approved by UL and FM, these Bourdon tube gauges are built to handle hydraulic pressures with exceptional accuracy and durability. Known for their ability to withstand high-pressure conditions, they are ideal for industries that require precise monitoring to ensure optimal system performance and safety. With a proven reputation for reliability, HD Pressure Gauges provide consistent readings, making them essential for critical fire protection systems. Explore our range to find the right fit for your application.<\/span><\/p>\n<h3 class=\"categoty-ttle\" style=\"font-weight: 300;\"><strong>HDP-1 Pressure Gauge<\/strong><\/h3>\n<ul style=\"font-weight: 400;\">\n<li>Dial Size: 90mm for optimal visibility and ease of reading.<\/li>\n<li>Pressure Range: 0-21 Kg\/Sq.Cm (0-300 PSI).<\/li>\n<li>Durable Construction: Polished stainless steel case provides a positive seal against weather, moisture, and dust.<\/li>\n<li>Bourdon Tube Material: Made of phosphorus bronze for excellent resistance to corrosion in diverse environments.<\/li>\n<li>Lightweight Design: Easy to install and handle, making it ideal for a range of industrial applications.<\/li>\n<li>UL Listed and FM Approved<\/li>\n<\/ul>\n<h3 class=\"categoty-ttle\" style=\"font-weight: 300;\"><strong>HDP-2 Pressure Gauge<\/strong><\/h3>\n<ul style=\"font-weight: 400;\">\n<li>Dial Size: 100mm for enhanced readability, ideal for quick assessments.<\/li>\n<li>Pressure Range: 0-21 Kg\/Sq.Cm (0-300 PSI), versatile for multiple applications.<\/li>\n<li>Seawater Compatibility: Specifically designed for seawater applications, ensuring reliability in marine environments.<\/li>\n<li>Durable and Corrosion-Resistant: Polished stainless steel case provides a positive seal against weather, moisture, and dust.<\/li>\n<li>Bourdon Tube Material: Constructed with Monel, offering superior resistance to corrosive elements.<\/li>\n<li>Glycerine-Filled: Reduces needle vibration, providing stable and accurate readings even in turbulent conditions.<\/li>\n<li>High Visibility Dial: Large dial size allows for easy reading from a distance, enhancing usability.<\/li>\n<li>UL Listed and FM Approved<\/li>\n<\/ul>\n\t\t<div data-elementor-type=\"section\" data-elementor-id=\"25519\" class=\"elementor elementor-25519\">\n\t\t\t\t\t<div class=\"elementor-section-wrap\">\n\t\t\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-aac3722 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"aac3722\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-18380dc\" data-id=\"18380dc\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-ef05808 elementor-widget elementor-widget-heading\" data-id=\"ef05808\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">FAQ<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f3c2b7b elementor-widget elementor-widget-eael-adv-accordion\" data-id=\"f3c2b7b\" data-element_type=\"widget\" data-widget_type=\"eael-adv-accordion.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t        <div class=\"eael-adv-accordion\" id=\"eael-adv-accordion-f3c2b7b\" data-scroll-on-click=\"no\" data-scroll-speed=\"300\" data-accordion-id=\"f3c2b7b\" data-accordion-type=\"accordion\" data-toogle-speed=\"300\">\n    <div class=\"eael-accordion-list\">\n                <div id=\"what-are-the-hdp-1-and-hdp-2-pressure-gauges-used-for\" class=\"elementor-tab-title eael-accordion-header\" tabindex=\"0\" data-tab=\"1\" aria-controls=\"elementor-tab-content-2551\"><span class=\"eael-advanced-accordion-icon-closed\"><svg aria-hidden=\"true\" class=\"fa-accordion-icon e-font-icon-svg e-fas-plus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span><span class=\"eael-advanced-accordion-icon-opened\"><svg aria-hidden=\"true\" class=\"fa-accordion-icon e-font-icon-svg e-fas-minus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span><span class=\"eael-accordion-tab-title\">What are the HDP-1 and HDP-2 Pressure Gauges used for?<\/span><svg aria-hidden=\"true\" class=\"fa-toggle e-font-icon-svg e-fas-angle-right\" viewBox=\"0 0 256 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M224.3 273l-136 136c-9.4 9.4-24.6 9.4-33.9 0l-22.6-22.6c-9.4-9.4-9.4-24.6 0-33.9l96.4-96.4-96.4-96.4c-9.4-9.4-9.4-24.6 0-33.9L54.3 103c9.4-9.4 24.6-9.4 33.9 0l136 136c9.5 9.4 9.5 24.6.1 34z\"><\/path><\/svg><\/div><div id=\"elementor-tab-content-2551\" class=\"eael-accordion-content clearfix\" data-tab=\"1\" aria-labelledby=\"what-are-the-hdp-1-and-hdp-2-pressure-gauges-used-for\"><p><span style=\"font-weight: 400;\">HDP-1 and HDP-2 pressure gauges are designed for water pressure measurement in fire protection systems such as wet sprinkler systems, deluge systems, hydrant systems, and fire pump installations. They provide accurate indication of water pressure and help ensure system reliability and compliance with NFPA standards.<\/span><\/p><\/div>\n                <\/div><div class=\"eael-accordion-list\">\n                <div id=\"what-is-the-difference-between-hdp-1-and-hdp-2-models\" class=\"elementor-tab-title eael-accordion-header\" tabindex=\"0\" data-tab=\"2\" aria-controls=\"elementor-tab-content-2552\"><span class=\"eael-advanced-accordion-icon-closed\"><svg aria-hidden=\"true\" class=\"fa-accordion-icon e-font-icon-svg e-fas-plus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span><span class=\"eael-advanced-accordion-icon-opened\"><svg aria-hidden=\"true\" class=\"fa-accordion-icon e-font-icon-svg e-fas-minus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span><span class=\"eael-accordion-tab-title\">What is the difference between HDP-1 and HDP-2 models?<\/span><svg aria-hidden=\"true\" class=\"fa-toggle e-font-icon-svg e-fas-angle-right\" viewBox=\"0 0 256 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M224.3 273l-136 136c-9.4 9.4-24.6 9.4-33.9 0l-22.6-22.6c-9.4-9.4-9.4-24.6 0-33.9l96.4-96.4-96.4-96.4c-9.4-9.4-9.4-24.6 0-33.9L54.3 103c9.4-9.4 24.6-9.4 33.9 0l136 136c9.5 9.4 9.5 24.6.1 34z\"><\/path><\/svg><\/div><div id=\"elementor-tab-content-2552\" class=\"eael-accordion-content clearfix\" data-tab=\"2\" aria-labelledby=\"what-is-the-difference-between-hdp-1-and-hdp-2-models\"><p><span style=\"font-weight: 400;\">HDP-1 is a standard dry-type pressure gauge for freshwater service.<\/span><\/p><p><span style=\"font-weight: 400;\">HDP-2 is a glycerine-filled pressure gauge with a Monel Bourdon tube, suitable for sea water and corrosive environments. The liquid filling minimizes vibration effects and enhances gauge life.<\/span><\/p><\/div>\n                <\/div><div class=\"eael-accordion-list\">\n                <div id=\"what-pressure-ranges-are-available\" class=\"elementor-tab-title eael-accordion-header\" tabindex=\"0\" data-tab=\"3\" aria-controls=\"elementor-tab-content-2553\"><span class=\"eael-advanced-accordion-icon-closed\"><svg aria-hidden=\"true\" class=\"fa-accordion-icon e-font-icon-svg e-fas-plus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span><span class=\"eael-advanced-accordion-icon-opened\"><svg aria-hidden=\"true\" class=\"fa-accordion-icon e-font-icon-svg e-fas-minus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span><span class=\"eael-accordion-tab-title\">What pressure ranges are available?<\/span><svg aria-hidden=\"true\" class=\"fa-toggle e-font-icon-svg e-fas-angle-right\" viewBox=\"0 0 256 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M224.3 273l-136 136c-9.4 9.4-24.6 9.4-33.9 0l-22.6-22.6c-9.4-9.4-9.4-24.6 0-33.9l96.4-96.4-96.4-96.4c-9.4-9.4-9.4-24.6 0-33.9L54.3 103c9.4-9.4 24.6-9.4 33.9 0l136 136c9.5 9.4 9.5 24.6.1 34z\"><\/path><\/svg><\/div><div id=\"elementor-tab-content-2553\" class=\"eael-accordion-content clearfix\" data-tab=\"3\" aria-labelledby=\"what-pressure-ranges-are-available\"><p><span style=\"font-weight: 400;\">Standard range is 0\u2013300 PSI (0\u201321 bar), ideal for most fire water systems. Other ranges are available upon request for specific applications.<\/span><\/p><\/div>\n                <\/div><div class=\"eael-accordion-list\">\n                <div id=\"what-is-the-connection-size-and-mounting-type\" class=\"elementor-tab-title eael-accordion-header\" tabindex=\"0\" data-tab=\"4\" aria-controls=\"elementor-tab-content-2554\"><span class=\"eael-advanced-accordion-icon-closed\"><svg aria-hidden=\"true\" class=\"fa-accordion-icon e-font-icon-svg e-fas-plus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span><span class=\"eael-advanced-accordion-icon-opened\"><svg aria-hidden=\"true\" class=\"fa-accordion-icon e-font-icon-svg e-fas-minus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span><span class=\"eael-accordion-tab-title\">What is the connection size and mounting type?<\/span><svg aria-hidden=\"true\" class=\"fa-toggle e-font-icon-svg e-fas-angle-right\" viewBox=\"0 0 256 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M224.3 273l-136 136c-9.4 9.4-24.6 9.4-33.9 0l-22.6-22.6c-9.4-9.4-9.4-24.6 0-33.9l96.4-96.4-96.4-96.4c-9.4-9.4-9.4-24.6 0-33.9L54.3 103c9.4-9.4 24.6-9.4 33.9 0l136 136c9.5 9.4 9.5 24.6.1 34z\"><\/path><\/svg><\/div><div id=\"elementor-tab-content-2554\" class=\"eael-accordion-content clearfix\" data-tab=\"4\" aria-labelledby=\"what-is-the-connection-size-and-mounting-type\"><p><span style=\"font-weight: 400;\">Both models feature a \u00bc\u201d BSPT male connection and bottom mounting for direct installation on valves, pumps, or test lines.<\/span><\/p><\/div>\n                <\/div><div class=\"eael-accordion-list\">\n                <div id=\"are-the-gauges-ul-or-fm-approved\" class=\"elementor-tab-title eael-accordion-header\" tabindex=\"0\" data-tab=\"5\" aria-controls=\"elementor-tab-content-2555\"><span class=\"eael-advanced-accordion-icon-closed\"><svg aria-hidden=\"true\" class=\"fa-accordion-icon e-font-icon-svg e-fas-plus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span><span class=\"eael-advanced-accordion-icon-opened\"><svg aria-hidden=\"true\" class=\"fa-accordion-icon e-font-icon-svg e-fas-minus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span><span class=\"eael-accordion-tab-title\">Are the gauges UL or FM approved?<\/span><svg aria-hidden=\"true\" class=\"fa-toggle e-font-icon-svg e-fas-angle-right\" viewBox=\"0 0 256 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M224.3 273l-136 136c-9.4 9.4-24.6 9.4-33.9 0l-22.6-22.6c-9.4-9.4-9.4-24.6 0-33.9l96.4-96.4-96.4-96.4c-9.4-9.4-9.4-24.6 0-33.9L54.3 103c9.4-9.4 24.6-9.4 33.9 0l136 136c9.5 9.4 9.5 24.6.1 34z\"><\/path><\/svg><\/div><div id=\"elementor-tab-content-2555\" class=\"eael-accordion-content clearfix\" data-tab=\"5\" aria-labelledby=\"are-the-gauges-ul-or-fm-approved\"><p><span style=\"font-weight: 400;\">Yes, both HDP-1 and HDP-2 are UL Listed and FM Approved for use in fire protection systems.<\/span><\/p><\/div>\n                <\/div><div class=\"eael-accordion-list\">\n                <div id=\"are-the-gauges-suitable-for-outdoor-or-marine-environments\" class=\"elementor-tab-title eael-accordion-header\" tabindex=\"0\" data-tab=\"6\" aria-controls=\"elementor-tab-content-2556\"><span class=\"eael-advanced-accordion-icon-closed\"><svg aria-hidden=\"true\" class=\"fa-accordion-icon e-font-icon-svg e-fas-plus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span><span class=\"eael-advanced-accordion-icon-opened\"><svg aria-hidden=\"true\" class=\"fa-accordion-icon e-font-icon-svg e-fas-minus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span><span class=\"eael-accordion-tab-title\">Are the gauges suitable for outdoor or marine environments?<\/span><svg aria-hidden=\"true\" class=\"fa-toggle e-font-icon-svg e-fas-angle-right\" viewBox=\"0 0 256 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M224.3 273l-136 136c-9.4 9.4-24.6 9.4-33.9 0l-22.6-22.6c-9.4-9.4-9.4-24.6 0-33.9l96.4-96.4-96.4-96.4c-9.4-9.4-9.4-24.6 0-33.9L54.3 103c9.4-9.4 24.6-9.4 33.9 0l136 136c9.5 9.4 9.5 24.6.1 34z\"><\/path><\/svg><\/div><div id=\"elementor-tab-content-2556\" class=\"eael-accordion-content clearfix\" data-tab=\"6\" aria-labelledby=\"are-the-gauges-suitable-for-outdoor-or-marine-environments\"><p><span style=\"font-weight: 400;\">Yes. The HDP-2 model is specifically suited for marine and coastal environments due to its corrosion-resistant stainless-steel body and Monel Bourdon tube. It performs reliably even with sea water exposure.<\/span><\/p><\/div>\n                <\/div><div class=\"eael-accordion-list\">\n                <div id=\"do-the-gauges-come-pre-calibrated\" class=\"elementor-tab-title eael-accordion-header\" tabindex=\"0\" data-tab=\"7\" aria-controls=\"elementor-tab-content-2557\"><span class=\"eael-advanced-accordion-icon-closed\"><svg aria-hidden=\"true\" class=\"fa-accordion-icon e-font-icon-svg e-fas-plus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span><span class=\"eael-advanced-accordion-icon-opened\"><svg aria-hidden=\"true\" class=\"fa-accordion-icon e-font-icon-svg e-fas-minus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span><span class=\"eael-accordion-tab-title\">Do the gauges come pre-calibrated?<\/span><svg aria-hidden=\"true\" class=\"fa-toggle e-font-icon-svg e-fas-angle-right\" viewBox=\"0 0 256 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M224.3 273l-136 136c-9.4 9.4-24.6 9.4-33.9 0l-22.6-22.6c-9.4-9.4-9.4-24.6 0-33.9l96.4-96.4-96.4-96.4c-9.4-9.4-9.4-24.6 0-33.9L54.3 103c9.4-9.4 24.6-9.4 33.9 0l136 136c9.5 9.4 9.5 24.6.1 34z\"><\/path><\/svg><\/div><div id=\"elementor-tab-content-2557\" class=\"eael-accordion-content clearfix\" data-tab=\"7\" aria-labelledby=\"do-the-gauges-come-pre-calibrated\"><p><span style=\"font-weight: 400;\">Yes. All HDP gauges are factory calibrated.<\/span><\/p><\/div>\n                <\/div><div class=\"eael-accordion-list\">\n                <div id=\"how-should-the-gauges-be-installed\" class=\"elementor-tab-title eael-accordion-header\" tabindex=\"0\" data-tab=\"8\" aria-controls=\"elementor-tab-content-2558\"><span class=\"eael-advanced-accordion-icon-closed\"><svg aria-hidden=\"true\" class=\"fa-accordion-icon e-font-icon-svg e-fas-plus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span><span class=\"eael-advanced-accordion-icon-opened\"><svg aria-hidden=\"true\" class=\"fa-accordion-icon e-font-icon-svg e-fas-minus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span><span class=\"eael-accordion-tab-title\">How should the gauges be installed?<\/span><svg aria-hidden=\"true\" class=\"fa-toggle e-font-icon-svg e-fas-angle-right\" viewBox=\"0 0 256 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M224.3 273l-136 136c-9.4 9.4-24.6 9.4-33.9 0l-22.6-22.6c-9.4-9.4-9.4-24.6 0-33.9l96.4-96.4-96.4-96.4c-9.4-9.4-9.4-24.6 0-33.9L54.3 103c9.4-9.4 24.6-9.4 33.9 0l136 136c9.5 9.4 9.5 24.6.1 34z\"><\/path><\/svg><\/div><div id=\"elementor-tab-content-2558\" class=\"eael-accordion-content clearfix\" data-tab=\"8\" aria-labelledby=\"how-should-the-gauges-be-installed\"><p><span style=\"font-weight: 400;\">Install upright using a compatible thread sealant for water or sea water service. Avoid overtightening or exposure to mechanical vibration beyond rated limits. For vibration-prone areas, HDP-2 (liquid-filled) is recommended.<\/span><\/p><\/div>\n                <\/div><div class=\"eael-accordion-list\">\n                <div id=\"how-often-should-the-gauges-be-inspected-or-replaced\" class=\"elementor-tab-title eael-accordion-header\" tabindex=\"0\" data-tab=\"9\" aria-controls=\"elementor-tab-content-2559\"><span class=\"eael-advanced-accordion-icon-closed\"><svg aria-hidden=\"true\" class=\"fa-accordion-icon e-font-icon-svg e-fas-plus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span><span class=\"eael-advanced-accordion-icon-opened\"><svg aria-hidden=\"true\" class=\"fa-accordion-icon e-font-icon-svg e-fas-minus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span><span class=\"eael-accordion-tab-title\">How often should the gauges be inspected or replaced?<\/span><svg aria-hidden=\"true\" class=\"fa-toggle e-font-icon-svg e-fas-angle-right\" viewBox=\"0 0 256 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M224.3 273l-136 136c-9.4 9.4-24.6 9.4-33.9 0l-22.6-22.6c-9.4-9.4-9.4-24.6 0-33.9l96.4-96.4-96.4-96.4c-9.4-9.4-9.4-24.6 0-33.9L54.3 103c9.4-9.4 24.6-9.4 33.9 0l136 136c9.5 9.4 9.5 24.6.1 34z\"><\/path><\/svg><\/div><div id=\"elementor-tab-content-2559\" class=\"eael-accordion-content clearfix\" data-tab=\"9\" aria-labelledby=\"how-often-should-the-gauges-be-inspected-or-replaced\"><p><span style=\"font-weight: 400;\">As per NFPA 25 maintenance guidelines: inspect monthly for normal readings and replace every 5 years or earlier if damaged, corroded, or inaccurate.<\/span><\/p><\/div>\n                <\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\n","protected":false},"excerpt":{"rendered":"<p>HD Pressure Gauges (HDP-1 and HDP-2) are specifically designed for fire protection applications, offering high-precision pressure measurement and reliable performance in demanding environments. Approved by UL and FM, these Bourdon tube gauges are built to handle hydraulic pressures with exceptional accuracy and durability. Known for their ability to withstand high-pressure conditions, they are ideal for<\/p>\n","protected":false},"featured_media":26149,"template":"","meta":{"_acf_changed":false},"product_brand":[],"product_cat":[79],"product_tag":[],"class_list":{"0":"post-20432","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-system-valves-accessories","8":"first","9":"instock","10":"shipping-taxable","11":"product-type-simple"},"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Pressure Gauges | UL and FM Approved | HD Fire Protect<\/title>\n<meta name=\"description\" content=\"HD Pressure Gauges (HDP-1 &amp; HDP-2) designed for fire protection, ensuring precise pressure measurement and reliable performance.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.hdfire.com\/products-solutions\/system-valves-accessories\/pressure-gauges\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Pressure Gauges | UL and FM Approved | HD Fire Protect\" \/>\n<meta property=\"og:description\" content=\"HD Pressure Gauges (HDP-1 &amp; HDP-2) designed for fire protection, ensuring precise pressure measurement and reliable performance.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.hdfire.com\/products-solutions\/system-valves-accessories\/pressure-gauges\/\" \/>\n<meta property=\"og:site_name\" content=\"hdfire\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/HdFireProtectPvtLtd\/\" \/>\n<meta property=\"article:modified_time\" content=\"2025-09-22T13:33:02+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.hdfire.com\/wp-content\/uploads\/2024\/07\/new-img-pressure.png\" \/>\n\t<meta property=\"og:image:width\" content=\"600\" \/>\n\t<meta property=\"og:image:height\" content=\"600\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.hdfire.com\/products-solutions\/system-valves-accessories\/pressure-gauges\/\",\"url\":\"https:\/\/www.hdfire.com\/products-solutions\/system-valves-accessories\/pressure-gauges\/\",\"name\":\"Pressure Gauges | UL and FM Approved | HD Fire Protect\",\"isPartOf\":{\"@id\":\"https:\/\/www.hdfire.com\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.hdfire.com\/products-solutions\/system-valves-accessories\/pressure-gauges\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/www.hdfire.com\/products-solutions\/system-valves-accessories\/pressure-gauges\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.hdfire.com\/wp-content\/uploads\/2024\/07\/new-img-pressure.png\",\"datePublished\":\"2024-07-08T09:25:11+00:00\",\"dateModified\":\"2025-09-22T13:33:02+00:00\",\"description\":\"HD Pressure Gauges (HDP-1 & HDP-2) designed for fire protection, ensuring precise pressure measurement and reliable performance.\",\"breadcrumb\":{\"@id\":\"https:\/\/www.hdfire.com\/products-solutions\/system-valves-accessories\/pressure-gauges\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.hdfire.com\/products-solutions\/system-valves-accessories\/pressure-gauges\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/www.hdfire.com\/products-solutions\/system-valves-accessories\/pressure-gauges\/#primaryimage\",\"url\":\"https:\/\/www.hdfire.com\/wp-content\/uploads\/2024\/07\/new-img-pressure.png\",\"contentUrl\":\"https:\/\/www.hdfire.com\/wp-content\/uploads\/2024\/07\/new-img-pressure.png\",\"width\":600,\"height\":600},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.hdfire.com\/products-solutions\/system-valves-accessories\/pressure-gauges\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/www.hdfire.com\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Products &#038; 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