{"id":1366,"date":"2026-10-28T11:40:56","date_gmt":"2026-10-28T03:40:56","guid":{"rendered":"https:\/\/www.huiqi-china.com\/?p=1366"},"modified":"2026-10-28T11:45:37","modified_gmt":"2026-10-28T03:45:37","slug":"penquan-shuibeng-yixiang-yuanyin-fenxi","status":"publish","type":"post","link":"https:\/\/www.huiqi-china.com\/en\/penquan-shuibeng-yixiang-yuanyin-fenxi\/","title":{"rendered":"How to Identify the Cause of Unusual Noises in Fountain Pumps? Analysis of 6 Types of Noises and Their Corresponding Faults"},"content":{"rendered":"<article style=\"max-width: 800px; margin: 0 auto; padding: 20px; font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif; line-height: 1.8; color: #333; text-align: left;\">\n\n  <p style=\"text-align: left; margin-bottom: 20px;\">Unusual noises from fountain pumps are early warning signs of deteriorating pump health and are also the maintenance alerts that operators are most likely to overlook. The bottom line: Different types of noises correspond to different failure mechanisms, and the solutions vary completely\u2014high-frequency screeching may indicate cavitation, low-frequency vibration may indicate failed vibration damping, and metallic grinding sounds may indicate bearing damage. Shutting down the pump and replacing it as soon as an unusual noise is heard is an overreaction, while ignoring the issue until the pump stops completely is a serious mistake. The correct approach is to identify the type of noise, quickly pinpoint the cause of the failure, and address it with targeted measures. This article systematically breaks down the failure mechanisms and troubleshooting methods corresponding to six types of pump noise.<\/p>\n\n  <h2 style=\"font-size: 22px; color: #1a1a1a; border-left: 4px solid #007cba; padding-left: 10px; margin-top: 35px; margin-bottom: 20px; text-align: left;\">Before Diagnosis: Gather Basic Characteristics of the Abnormal Noise<\/h2>\n\n  <p style=\"text-align: left; margin-bottom: 20px;\">From a safe distance, carefully observe the following characteristics, which are key inputs for determining the type of malfunction:<\/p>\n  <ul style=\"padding-left: 20px; margin-bottom: 20px; text-align: left; list-style-type: disc;\">\n    <li style=\"margin-bottom: 8px; text-align: left;\"><strong>When the noise occurs:<\/strong>Does it occur at startup, disappear during operation, or persist?<\/li>\n    <li style=\"margin-bottom: 8px; text-align: left;\"><strong>Frequency Characteristics:<\/strong>A high-frequency, piercing sound, a mid-frequency hum, or a low-frequency, muffled vibration?<\/li>\n    <li style=\"margin-bottom: 8px; text-align: left;\"><strong>Regularity:<\/strong>Is it a continuous, steady sound, or an intermittent, rhythmic, periodic sound?<\/li>\n    <li style=\"margin-bottom: 8px; text-align: left;\"><strong>Associated phenomena:<\/strong>Is this accompanied by a drop in water flow, fluctuations in current, or an alarm from the control panel?<\/li>\n  <\/ul>\n\n  <h2 style=\"font-size: 22px; color: #1a1a1a; border-left: 4px solid #007cba; padding-left: 10px; margin-top: 35px; margin-bottom: 20px; text-align: left;\">Diagnostic Chart for Common Types of Malfunctions<\/h2>\n\n  <figure style=\"margin: 20px 0; overflow-x: auto;\">\n    <table style=\"width: 100%; border-collapse: collapse; min-width: 650px; font-size: 14px; text-align: left; border: 1px solid #e0e0e0;\">\n      <thead>\n        <tr style=\"background-color: #f7f7f7; border-bottom: 2px solid #dcdcdc;\">\n          <th style=\"padding: 12px 15px; border: 1px solid #e0e0e0; font-weight: 600;\">Types of Noise<\/th>\n          <th style=\"padding: 12px 15px; border: 1px solid #e0e0e0; font-weight: 600;\">Cause of the Malfunction<\/th>\n          <th style=\"padding: 12px 15px; border: 1px solid #e0e0e0; font-weight: 600;\">Areas to Investigate<\/th>\n        <\/tr>\n      <\/thead>\n      <tbody>\n        <tr style=\"border-bottom: 1px solid #e0e0e0;\">\n          <td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; font-weight: bold;\">High-Frequency Whining<\/td>\n          <td style=\"padding: 12px 15px; border: 1px solid #e0e0e0;\">Cavitation<\/td>\n          <td style=\"padding: 12px 15px; border: 1px solid #e0e0e0;\">Low water level, clogged filter<\/td>\n        <\/tr>\n        <tr style=\"background-color: #fcfcfc; border-bottom: 1px solid #e0e0e0;\">\n          <td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; font-weight: bold;\">Low-frequency vibration\/humming<\/td>\n          <td style=\"padding: 12px 15px; border: 1px solid #e0e0e0;\">Damping Failure\/Hard Contact<\/td>\n          <td style=\"padding: 12px 15px; border: 1px solid #e0e0e0;\">Inspect the vibration-damping pads and install flexible couplings<\/td>\n        <\/tr>\n        <tr style=\"border-bottom: 1px solid #e0e0e0;\">\n          <td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; font-weight: bold;\">Metal-on-metal friction\/impact<\/td>\n          <td style=\"padding: 12px 15px; border: 1px solid #e0e0e0;\">Bearing Wear \/ Foreign Object in the Impeller<\/td>\n          <td style=\"padding: 12px 15px; border: 1px solid #e0e0e0;\">Check the bearings and the water intake filter screen<\/td>\n        <\/tr>\n      <\/tbody>\n    <\/table>\n  <\/figure>\n\n  <h2 style=\"font-size: 22px; color: #1a1a1a; border-left: 4px solid #007cba; padding-left: 10px; margin-top: 35px; margin-bottom: 20px; text-align: left;\">Detailed Analysis of Abnormal Noises<\/h2>\n\n  <h3 style=\"font-size: 18px; color: #333; margin-top: 25px; margin-bottom: 12px; text-align: left;\">1. Cavitation noise (high-pitched whistling)<\/h3>\n  <p style=\"text-align: left; margin-bottom: 20px;\">It occurs when the pressure on the suction side is insufficient, causing vaporization in the impeller region that produces bubbles which collapse instantly. Cavitation can damage the impeller.<strong>Processing:<\/strong>Ensure there is sufficient water, clean the intake filter, and check whether the suction lift is too great.<\/p>\n\n  <h3 style=\"font-size: 18px; color: #333; margin-top: 25px; margin-bottom: 12px; text-align: left;\">2. Mechanical Vibration (Low-Frequency Hum)<\/h3>\n  <p style=\"text-align: left; margin-bottom: 20px;\">This is often caused by hardening of the base vibration-damping pads or excessive stiffness in the connecting pipes.<strong>Processing:<\/strong>Replace the vibration-damping pads, install flexible couplings, and adjust the variable-frequency range to avoid resonance frequencies.<\/p>\n\n  <h3 style=\"font-size: 18px; color: #333; margin-top: 25px; margin-bottom: 12px; text-align: left;\">3. Bearing Failure (Friction\/Impact)<\/h3>\n  <p style=\"text-align: left; margin-bottom: 20px;\">When a bearing wears out, the clearance between the balls changes.<strong>Processing:<\/strong>Do not delay in addressing this type of unusual noise; you must shut down the machine and replace the bearings. If the impeller has been damaged by impact, the entire unit must be replaced.<\/p>\n\n  <h2 style=\"font-size: 22px; color: #1a1a1a; border-left: 4px solid #007cba; padding-left: 10px; margin-top: 35px; margin-bottom: 20px; text-align: left;\">Frequently Asked Questions (FAQ)<\/h2>\n  \n  <h3 style=\"font-size: 16px; color: #1a1a1a; margin-top: 20px; margin-bottom: 8px; text-align: left; font-weight: bold;\">Q: How loud is a fountain pump when it's operating normally?<\/h3>\n  <p style=\"text-align: left; margin-bottom: 15px;\">A: A submersible pump should operate almost silently in water, with only the faint sound of water flow; when a dry-type centrifugal pump is running smoothly, it should produce only a steady motor hum, with no sharp, high-pitched noises.<\/p>\n  \n  <h3 style=\"font-size: 16px; color: #1a1a1a; margin-top: 20px; margin-bottom: 8px; text-align: left; font-weight: bold;\">Q: Is it normal for a new pump to make unusual noises right after installation?<\/h3>\n  <p style=\"text-align: left; margin-bottom: 15px;\">A: This is abnormal. It is usually caused by improper installation conditions, such as a water level that is too low or the unit coming into direct contact with the foundation. You should first check the installation environment.<\/p>\n\n  <h3 style=\"font-size: 16px; color: #1a1a1a; margin-top: 20px; margin-bottom: 8px; text-align: left; font-weight: bold;\">Q: The water is flowing normally, but there's a noise. Should I just ignore it?<\/h3>\n  <p style=\"text-align: left; margin-bottom: 15px;\">A: No. The noise serves as an early warning sign of equipment deterioration; by the time the water flow decreases, the problem has already progressed from a warning to an actual failure.<\/p>\n\n  <p style=\"margin-top: 40px; padding: 20px; background-color: #f9f9f9; border-left: 4px solid #007cba; font-size: 15px; text-align: left;\">\n    <strong>Huiqi Fountain<\/strong>With 19 years of industry experience, our maintenance contracts include quarterly inspections of pump operating conditions (current, insulation, and bearing condition) and on-site diagnostic services in the event of unusual noises. Official website: www.huiqi-china.com; Phone: 13826128838.\n  <\/p>\n\n<\/article>","protected":false},"excerpt":{"rendered":"<p>\u55b7\u6cc9\u6c34\u6cf5\u5f02\u54cd\u662f\u6c34\u6cf5\u5065\u5eb7\u72b6\u6001\u6076\u5316\u7684\u65e9\u671f\u4fe1\u53f7 [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":1368,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1366","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-fountain-news"],"_links":{"self":[{"href":"https:\/\/www.huiqi-china.com\/en\/wp-json\/wp\/v2\/posts\/1366","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.huiqi-china.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.huiqi-china.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.huiqi-china.com\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.huiqi-china.com\/en\/wp-json\/wp\/v2\/comments?post=1366"}],"version-history":[{"count":1,"href":"https:\/\/www.huiqi-china.com\/en\/wp-json\/wp\/v2\/posts\/1366\/revisions"}],"predecessor-version":[{"id":1367,"href":"https:\/\/www.huiqi-china.com\/en\/wp-json\/wp\/v2\/posts\/1366\/revisions\/1367"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.huiqi-china.com\/en\/wp-json\/wp\/v2\/media\/1368"}],"wp:attachment":[{"href":"https:\/\/www.huiqi-china.com\/en\/wp-json\/wp\/v2\/media?parent=1366"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.huiqi-china.com\/en\/wp-json\/wp\/v2\/categories?post=1366"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.huiqi-china.com\/en\/wp-json\/wp\/v2\/tags?post=1366"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}