{"id":961,"date":"2021-06-27T07:20:39","date_gmt":"2021-06-27T07:20:39","guid":{"rendered":"http:\/\/bldcpump-local.local\/which-factors-affect-the-pressure-the-head-of-the-water-pump\/"},"modified":"2026-05-01T06:30:20","modified_gmt":"2026-05-01T06:30:20","slug":"which-factors-affect-the-pressure-the-head-of-the-water-pump","status":"publish","type":"page","link":"https:\/\/www.bldcpump.com\/ja\/\u30b5\u30dd\u30fc\u30c8\/\u6c34\u30dd\u30f3\u30d7\u306e\u30d8\u30c3\u30c9\u5727\u529b\u306b\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u8981\u56e0\/","title":{"rendered":"\u30a6\u30a9\u30fc\u30bf\u30fc\u30dd\u30f3\u30d7\u306e\u63da\u7a0b\uff08\u5727\u529b\uff09\u306b\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u8981\u56e0\u306f\u4f55\u3067\u3059\u304b\uff1f"},"content":{"rendered":"<main>\n\n  <!-- \u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\n       SECTION 1 -- PAGE HERO \/ TITLE BANNER WITH BREADCRUMB (dark, matches \/features\/)\n  \u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550 -->\n  <section aria-label=\"Page hero\" style=\"background:linear-gradient(135deg,#062A42 0%,#0B5E8F 60%,#1CA0C4 100%);position:relative;overflow:hidden;padding:56px 56px 48px;\">\n\n    <!-- Dark grid background -->\n    <div class=\"grid-bg-dark\" style=\"position:absolute;inset:0;opacity:0.7;pointer-events:none;\" aria-hidden=\"true\"><\/div>\n\n    <!-- Radial glow -->\n    <div style=\"position:absolute;top:-60px;right:-80px;width:500px;height:400px;background:radial-gradient(circle at 50% 50%,rgba(91,196,222,.18),transparent 65%);pointer-events:none;\" aria-hidden=\"true\"><\/div>\n\n    <div style=\"max-width:1140px;margin:0 auto;position:relative;z-index:1;text-align:center;\">\n\n      <!-- Kicker -->\n      <div class=\"kicker\" style=\"color:#5BC4DE;margin-bottom:18px;\">\u25c6 SUPPORT \u00b7 TECHNICAL GUIDE<\/div>\n\n      <!-- H1 -->\n      <h1 style=\"font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;font-size:clamp(28px,4vw,50px);font-weight:600;color:#FFFFFF;letter-spacing:-0.025em;line-height:1.1;margin:0 auto 24px;max-width:820px;\">\n        Which factors affect <span style=\"color:#5BC4DE;\">the head of the water pump?<\/span>\n      <\/h1>\n\n      <!-- Breadcrumb -->\n      <nav aria-label=\"Breadcrumb\">\n        <ol style=\"display:inline-flex;align-items:center;flex-wrap:wrap;justify-content:center;gap:8px;list-style:none;padding:0;margin:0;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;font-size:14px;color:rgba(255,255,255,.65);\">\n          <li>\n            <a href=\"\/\" style=\"color:#5BC4DE;text-decoration:none;font-weight:500;transition:color .2s;\" onmouseover=\"this.style.color='#FFFFFF'\" onmouseout=\"this.style.color='#5BC4DE'\">Home<\/a>\n          <\/li>\n          <li aria-hidden=\"true\" style=\"color:rgba(255,255,255,.35);font-size:12px;\">\u203a<\/li>\n          <li>\n            <span style=\"color:rgba(255,255,255,.65);\">Support<\/span>\n          <\/li>\n          <li aria-hidden=\"true\" style=\"color:rgba(255,255,255,.35);font-size:12px;\">\u203a<\/li>\n          <li>\n            <span aria-current=\"page\" style=\"color:rgba(255,255,255,.65);\">Which factors affect the head of the water pump?<\/span>\n          <\/li>\n        <\/ol>\n      <\/nav>\n\n    <\/div>\n  <\/section>\n  <!-- \u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\n       SECTION 2 -- ARTICLE BODY + SIDEBAR\n  \u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550 -->\n  <section aria-label=\"Article content and sidebar\" style=\"background:#F6F8FA;padding:64px 56px 80px;\">\n    <div style=\"max-width:1280px;margin:0 auto;display:grid;grid-template-columns:1fr 340px;gap:48px;align-items:start;\">\n\n      <!-- \u2500\u2500\u2500 LEFT COLUMN: MAIN ARTICLE \u2500\u2500\u2500 -->\n      <article style=\"background:#FFFFFF;border:1px solid #E3E8EE;border-radius:8px;padding:40px 44px;box-shadow:0 1px 2px rgba(6,42,66,.06),0 1px 0 rgba(6,42,66,.04);\">\n\n        <!-- Featured snippet block (answer-first, added 2026-07-20) -->\n        <h2 style=\"font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;font-size:clamp(20px,3vw,28px);font-weight:600;color:#062A42;letter-spacing:-0.02em;line-height:1.15;margin:0 0 16px;padding-bottom:10px;border-bottom:1.5px solid #E3E8EE;\">\n          What factors affect a water pump's head (pressure)?\n        <\/h2>\n        <p style=\"font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;font-size:16px;color:#062A42;line-height:1.75;margin:0 0 32px;\">\n          <strong>A small centrifugal pump's head is determined by three factors: (1) motor wattage &mdash; higher power gives higher head; (2) motor speed &mdash; DC pumps reach 6,000&nbsp;rpm vs ~3,000&nbsp;rpm for AC, so they deliver more head; (3) outlet inner diameter &mdash; a smaller outlet raises head but lowers flow rate.<\/strong>\n        <\/p>\n        <!-- Intro paragraph -->\n        <p style=\"font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;font-size:16px;color:#6B7A88;line-height:1.75;margin:0 0 32px;\">\n          Here we will only discuss small centrifugal pumps, not other types of water pumps. We will mainly consider the factors that affect the pump head (pressure).\n        <\/p>\n\n        <!-- H2: What is the head? -->\n        <h2 style=\"font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;font-size:clamp(20px,3vw,28px);font-weight:600;color:#062A42;letter-spacing:-0.02em;line-height:1.15;margin:0 0 16px;padding-bottom:10px;border-bottom:1.5px solid #E3E8EE;\">\n          So what is the head?\n        <\/h2>\n\n        <p style=\"font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;font-size:15px;color:#6B7A88;line-height:1.75;margin:0 0 28px;\">\n          \"Assume that you have a pump that you can disconnect the discharge pipe or tube and are able to extend it vertically. Head is the height at which a pump can raise water up.\"\n        <\/p>\n\n        <!-- Head illustration image -->\n        <figure style=\"margin:0 0 28px;text-align:center;\">\n          <img decoding=\"async\"\n            src=\"\/wp-content\/uploads\/2018\/10\/what-is-the-head-image.jpg\"\n            alt=\"Technical illustration of a water pump connected to a tank with a vertical discharge pipe. The diagram shows the concept of pump head -- the vertical height labeled 'HEAD' indicating how high the pump can raise water, with a small watermark 'www.pumpfundamentals.com'.\"\n            style=\"max-width:100%;height:auto;border:1px solid #E3E8EE;border-radius:6px;display:inline-block;\"\n            sizes=\"(max-width: 768px) calc(100vw - 48px), (max-width: 1280px) calc(100vw - 500px), 680px\"\n          \/>\n          <figcaption style=\"font-family:ui-monospace,'SF Mono',Menlo,Consolas,'Courier New',monospace;font-size:11px;color:#6B7A88;letter-spacing:0.06em;margin-top:10px;\">\n            FIG. 1 -- Pump head: vertical height water can be raised \u00b7 www.pumpfundamentals.com\n          <\/figcaption>\n        <\/figure>\n\n        <p style=\"font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;font-size:15px;color:#6B7A88;line-height:1.75;margin:0 0 16px;\">\n          The head is somehow linked to the pressure. The more pressure the pump delivers, the higher the head will be.\n        <\/p>\n\n        <!-- Read more link -->\n        <p style=\"margin:0 0 36px;\">\n          <a href=\"http:\/\/www.pumpfundamentals.com\/what%20is%20head.htm\" target=\"_blank\" rel=\"noopener noreferrer\" style=\"font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;font-size:14px;font-weight:600;color:#1CA0C4;text-decoration:none;display:inline-flex;align-items:center;gap:6px;transition:color .2s;\" onmouseover=\"this.style.color='#0B5E8F'\" onmouseout=\"this.style.color='#1CA0C4'\">\n            Read this article to learn more about 'What is head?'\n            <svg width=\"14\" height=\"14\" viewBox=\"0 0 14 14\" fill=\"none\" aria-hidden=\"true\"><path d=\"M2 7h10M8 3l4 4-4 4\" stroke=\"currentColor\" stroke-width=\"1.6\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\/><\/svg>\n          <\/a>\n        <\/p>\n\n        <!-- H2: Common Mistake -->\n        <h2 style=\"font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;font-size:clamp(20px,3vw,28px);font-weight:600;color:#062A42;letter-spacing:-0.02em;line-height:1.15;margin:0 0 16px;padding-bottom:10px;border-bottom:1.5px solid #E3E8EE;\">\n          Common Mistake\n        <\/h2>\n\n        <p style=\"font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;font-size:15px;color:#6B7A88;line-height:1.75;margin:0 0 36px;\">\n          Some people think that more pressure means more flow rate when they are choosing water pumps. But it's wrong. The technical definition of pressure is force per unit area. So it can only affect the flow rate per unit area but has nothing to do with the total flow rate of a pump.\n        <\/p>\n\n        <!-- H2: Which factors affect the head? -->\n        <h2 style=\"font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;font-size:clamp(20px,3vw,28px);font-weight:600;color:#062A42;letter-spacing:-0.02em;line-height:1.15;margin:0 0 16px;padding-bottom:10px;border-bottom:1.5px solid #E3E8EE;\">\n          Which factors affect the head of the water pump?\n        <\/h2>\n\n        <p style=\"font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;font-size:15px;color:#6B7A88;line-height:1.75;margin:0 0 28px;\">\n          Many old customers often asked us, do you have any other model that could provide higher pressure? Obviously, pressure is an essential factor to consider when choosing a pump. Unfortunately, the pressure that small electric water pumps can provide is limited. Now let's take a look at what will affect the pressure or the head of the small centrifugal pumps.\n        <\/p>\n\n        <!-- H3: Wattage -->\n        <h3 style=\"font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;font-size:17px;font-weight:700;color:#062A42;letter-spacing:-0.01em;margin:0 0 12px;display:flex;align-items:center;gap:10px;\">\n          <span style=\"display:inline-block;width:3px;height:18px;background:#1CA0C4;border-radius:2px;flex-shrink:0;\" aria-hidden=\"true\"><\/span>\n          The wattage of the Pump\n        <\/h3>\n\n        <p style=\"font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;font-size:15px;color:#6B7A88;line-height:1.75;margin:0 0 28px;\">\n          The wattage of the pump is the most critical factor. The higher the power, the more pressure the pump can provide. But for small water pumps, it is impossible to make a massive wattage due to technical bottlenecks such as heat dissipation. For us now, the maximum power single-stage pump we can make is less than 150 watts. So, next, we will discuss what other factors can affect the head (the pressure) of the pump under a certain power wattage.\n        <\/p>\n\n        <!-- H3: Motor Speed -->\n        <h3 style=\"font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;font-size:17px;font-weight:700;color:#062A42;letter-spacing:-0.01em;margin:0 0 12px;display:flex;align-items:center;gap:10px;\">\n          <span style=\"display:inline-block;width:3px;height:18px;background:#1CA0C4;border-radius:2px;flex-shrink:0;\" aria-hidden=\"true\"><\/span>\n          Pump motor Speed\n        <\/h3>\n\n        <p style=\"font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;font-size:15px;color:#6B7A88;line-height:1.75;margin:0 0 16px;\">\n          Under a certain pump wattage, the speed of the pump is proportional to the pressure it can provide. This is why our DC water pumps can provide a higher head (more pressure) than AC water pumps.\n        <\/p>\n\n        <p style=\"font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;font-size:15px;color:#6B7A88;line-height:1.75;margin:0 0 28px;\">\n          The motor speed of this kind of small AC water pump depends on the frequency of alternating current (AC) electricity. So it is a constant (about 3000rpm). And we can't easily increase or decrease it. But for our DC water pumps, we can easily double the motor speed to 6000 rpm or higher.\n        <\/p>\n\n        <!-- H3: Inner diameter -->\n        <h3 style=\"font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;font-size:17px;font-weight:700;color:#062A42;letter-spacing:-0.01em;margin:0 0 12px;display:flex;align-items:center;gap:10px;\">\n          <span style=\"display:inline-block;width:3px;height:18px;background:#1CA0C4;border-radius:2px;flex-shrink:0;\" aria-hidden=\"true\"><\/span>\n          Inner diameter of the pump outlet\n        <\/h3>\n\n        <p style=\"font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;font-size:15px;color:#6B7A88;line-height:1.75;margin:0 0 16px;\">\n          The pump structure can also affect the head (the pressure) of the pump: when we reduce the inner diameter of the pump outlet, it can increase the head (the pressure) of the pump, at the meanwhile decrease its flow rate. And vice versa.\n        <\/p>\n\n        <p style=\"font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;font-size:15px;color:#6B7A88;line-height:1.75;margin:0 0 36px;\">\n          Therefore, under the premise of a specific power, the head of the pump is inversely proportional to its flow rate. This is something you should pay attention to when choosing a water pump.\n        <\/p>\n\n        <!-- H2: Conclusion -->\n        <h2 style=\"font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;font-size:clamp(20px,3vw,28px);font-weight:600;color:#062A42;letter-spacing:-0.02em;line-height:1.15;margin:0 0 16px;padding-bottom:10px;border-bottom:1.5px solid #E3E8EE;\">\n          Conclusion\n        <\/h2>\n\n        <p style=\"font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;font-size:15px;color:#6B7A88;line-height:1.75;margin:0;\">\n          In summary, the wattage of the pump, the speed of the motor, and the structure of the pump can ultimately affect the head (the pressure) of a pump. If you still have doubts, please don't hesitate to consult us.\n        <\/p>\n\n      <\/article>\n\n      <!-- \u2500\u2500 RIGHT COLUMN: Sidebar (v2 \u2014 explicit inline styles, no .product-card dependency) \u2500\u2500 -->\n      <aside aria-label=\"About and catalog sidebar\" style=\"display:flex;flex-direction:column;gap:24px;\">\n\n        <!-- Card 1: About BLDC PUMP -->\n        <div\n          style=\"background:#FFFFFF;border:1px solid #E3E8EE;border-radius:8px;overflow:hidden;box-shadow:0 1px 2px rgba(6,42,66,.06),0 1px 0 rgba(6,42,66,.04);transition:box-shadow .25s,transform .2s;\"\n          onmouseover=\"this.style.boxShadow='0 8px 24px -8px rgba(6,42,66,.18),0 2px 6px rgba(6,42,66,.06)';this.style.transform='translateY(-3px)'\"\n          onmouseout=\"this.style.boxShadow='0 1px 2px rgba(6,42,66,.06),0 1px 0 rgba(6,42,66,.04)';this.style.transform='translateY(0)'\"\n        >\n          <!-- Factory image -->\n          <img decoding=\"async\"\n            src=\"\/wp-content\/uploads\/2021\/06\/general-hero-bg-1.webp\"\n            alt=\"BLDC PUMP factory in Shenzhen \u2014 production line for brushless DC water pumps\"\n            width=\"340\"\n            height=\"200\"\n            sizes=\"auto, (max-width: 768px) 100vw, 340px\"\n            style=\"width:100%;height:200px;object-fit:cover;display:block;border-bottom:1px solid #E3E8EE;\"\n            loading=\"lazy\"\n          \/>\n          <!-- Card content -->\n          <div style=\"padding:24px 20px 28px;text-align:center;\">\n            <h3 style=\"font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;font-size:18px;font-weight:700;color:#062A42;letter-spacing:-0.01em;margin:0 0 14px;\">About BLDC PUMP<\/h3>\n            <p style=\"font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;font-size:13px;color:#6B7A88;line-height:1.7;margin:0 0 12px;\">\n              We are focused on brushless DC water pump's R&amp;D and production from 2009. A water pump manufacturer with about 100 highly technical, skilled employees in Shenzhen of China.\n            <\/p>\n            <p style=\"font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;font-size:13px;color:#6B7A88;line-height:1.7;margin:0 0 12px;\">\n              We've chosen to provide customers with comprehensive and flexible solutions according to customers' needs and win at the product quality.\n            <\/p>\n            <p style=\"font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;font-size:13px;color:#6B7A88;line-height:1.7;margin:0 0 20px;\">\n              Our passion lies in helping start-ups grow from 'Zero to One.' 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135 models<\/span>\n              <\/li>\n              <li style=\"display:flex;align-items:flex-start;gap:8px;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;font-size:13px;color:#0F2533;line-height:1.5;\">\n                <svg width=\"14\" height=\"14\" viewBox=\"0 0 14 14\" fill=\"none\" aria-hidden=\"true\" style=\"flex-shrink:0;margin-top:3px;\">\n                  <circle cx=\"7\" cy=\"7\" r=\"6.25\" stroke=\"#1CA0C4\" stroke-width=\"1.3\" fill=\"rgba(28,160,196,.08)\"\/>\n                  <path d=\"M4.2 7l2 2 3.6-4\" stroke=\"#1CA0C4\" stroke-width=\"1.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\/>\n                <\/svg>\n                <span>Performance curves &amp; dimensions<\/span>\n              <\/li>\n              <li style=\"display:flex;align-items:flex-start;gap:8px;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;font-size:13px;color:#0F2533;line-height:1.5;\">\n                <svg width=\"14\" height=\"14\" viewBox=\"0 0 14 14\" fill=\"none\" aria-hidden=\"true\" style=\"flex-shrink:0;margin-top:3px;\">\n                  <circle cx=\"7\" cy=\"7\" r=\"6.25\" stroke=\"#1CA0C4\" stroke-width=\"1.3\" fill=\"rgba(28,160,196,.08)\"\/>\n                  <path d=\"M4.2 7l2 2 3.6-4\" stroke=\"#1CA0C4\" stroke-width=\"1.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\/>\n                <\/svg>\n                <span>OEM customization options<\/span>\n              <\/li>\n              <li style=\"display:flex;align-items:flex-start;gap:8px;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;font-size:13px;color:#0F2533;line-height:1.5;\">\n                <svg width=\"14\" height=\"14\" viewBox=\"0 0 14 14\" fill=\"none\" aria-hidden=\"true\" style=\"flex-shrink:0;margin-top:3px;\">\n                  <circle cx=\"7\" cy=\"7\" r=\"6.25\" stroke=\"#1CA0C4\" stroke-width=\"1.3\" fill=\"rgba(28,160,196,.08)\"\/>\n                  <path d=\"M4.2 7l2 2 3.6-4\" stroke=\"#1CA0C4\" stroke-width=\"1.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\/>\n                <\/svg>\n                <span>Application case studies<\/span>\n              <\/li>\n            <\/ul>\n\n            <!-- Big download button -->\n            <a\n              href=\"\/downloads\/product-catalog.pdf\"\n              target=\"_blank\"\n              rel=\"noopener noreferrer\"\n              class=\"btn-primary\"\n              style=\"width:100%;justify-content:center;padding:13px 18px;font-size:14px;\"\n            >\n              <svg width=\"15\" height=\"15\" viewBox=\"0 0 16 16\" fill=\"none\" aria-hidden=\"true\" style=\"flex-shrink:0;\">\n                <path d=\"M8 2v9m0 0l-3.5-3.5M8 11l3.5-3.5M3 13.5h10\" stroke=\"currentColor\" stroke-width=\"1.6\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\/>\n              <\/svg>\n              Download Catalog (PDF)\n            <\/a>\n\n            <!-- Tiny footnote -->\n            <p style=\"font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;font-size:11px;color:#6B7A88;line-height:1.5;text-align:center;margin:12px 0 0;\">\n              Free &middot; 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See how each affects lift and how to choose the right pump.\",\n    \"url\": \"https:\/\/www.bldcpump.com\/support\/which-factors-affect-the-pressure-the-head-of-the-water-pump\/\",\n    \"mainEntityOfPage\": {\n        \"@type\": \"WebPage\",\n        \"@id\": \"https:\/\/www.bldcpump.com\/support\/which-factors-affect-the-pressure-the-head-of-the-water-pump\/\"\n    },\n    \"image\": \"https:\/\/www.bldcpump.com\/wp-content\/uploads\/2018\/10\/what-is-the-head-image.jpg\",\n    \"author\": {\n        \"@type\": \"Organization\",\n        \"name\": \"BLDC PUMP\",\n        \"url\": \"https:\/\/www.bldcpump.com\/\"\n    },\n    \"publisher\": {\n        \"@type\": \"Organization\",\n        \"name\": \"BLDC PUMP\",\n        \"logo\": {\n            \"@type\": \"ImageObject\",\n            \"url\": \"https:\/\/www.bldcpump.com\/wp-content\/uploads\/2019\/07\/Logo-300x300.png\"\n        },\n        \"foundingDate\": \"2009\"\n    },\n    \"datePublished\": \"2021-06-27T07:20:39+00:00\",\n    \"dateModified\": \"2026-07-21T03:33:50+00:00\",\n    \"articleSection\": \"Support & Technical\",\n    \"keywords\": \"water pump head, pump pressure factors, motor wattage, motor RPM, outlet diameter, BLDC pump selection\"\n}\n<\/script>\n<script type=\"application\/ld+json\">\n{\n    \"@context\": \"https:\/\/schema.org\",\n    \"@type\": \"FAQPage\",\n    \"mainEntity\": [\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What factors affect a water pump's head (pressure)?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"A small centrifugal pump's head is determined by three factors: (1) motor wattage \u2014 higher power gives higher head; (2) motor speed \u2014 DC pumps reach 6,000 rpm vs ~3,000 rpm for AC, so they deliver more head; (3) outlet inner diameter \u2014 a smaller outlet raises head but lowers flow rate.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Does motor wattage affect pump head?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Yes. Higher motor wattage generally produces higher pump head. Wattage is one of the three primary factors affecting a small centrifugal pump's head, alongside motor speed (RPM) and outlet inner diameter.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Why do DC pumps produce higher head than AC pumps?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"DC pumps can spin at higher RPM. Brushless DC motors typically reach 6,000 rpm compared to about 3,000 rpm for AC motors. Higher rotational speed directly increases pump head for the same size and wattage.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Does a smaller outlet diameter increase pump head?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Yes \u2014 but there is a trade-off. Reducing the outlet inner diameter raises the pump's head (pressure), but it also lowers the flow rate. 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Home \u203a Support \u203a Which factors affect the head of the water pump? What factors affect a water pump&#8217;s head (pressure)? A small centrifugal pump&#8217;s head is determined by three factors: (1) motor wattage &mdash; higher power gives higher head; (2) [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":1013,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"_seopress_robots_primary_cat":"","_seopress_titles_title":"What Affects Water Pump Head? 3 Key Factors | BLDC PUMP","_seopress_titles_desc":"A water pump's head depends on 3 factors: motor wattage, motor speed (RPM), and outlet inner diameter. 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