{"product_id":"scubapro-mk19-evo-a700-scuba-dive-regulator-system","title":"Scubapro MK19 EVO\/A700 Scuba Dive Regulator System - REG391 INT","description":"\u003ch2\u003eScubapro MK19 EVO\/A700 Scuba Dive Regulator System - REG391 INT\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eThe MK19 EVO \/ A700 takes our extraordinary breathing A700 and pairs it with an environmentally sealed MK19 EVO first stage that’s extremely resistant to freezing and fouling of its inner mechanism. The MK19 EVO offers a dry ambient pressure chamber that is equipped with a double spring for optimum reliability, and a LP port swivel turret to maximize hose routing options. The muscular A700, with its precision handcrafted full-metal casing, front cover and valve housing, offers best-in-class breathing performance, including effortless inhalation and an ease of exhalation that is unmatched.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cdiv class=\"field-item even\"\u003e\n\u003cul\u003e\n\u003cli\u003eMetal second stage case construction uses a larger diaphragm inside a compact casing, increasing breathing sensitivity\u003c\/li\u003e\n\u003cli\u003eAir balanced second stage valve smoothes out the inhalation effort when diving at varying depths and supply pressures.\u003c\/li\u003e\n\u003cli\u003eSectional exhaust tee and a first-rate purge help to deliver effortless inhalation and an ease of exhalation that is unmatched.\u003c\/li\u003e\n\u003cli\u003eEasy-to-use, adjustable inhalation effort knob to achieve maximum, personalized comfort\u003c\/li\u003e\n\u003cli\u003eSuper-flow hose features an oversized bore that allows more air to flow on each inhalation.\u003c\/li\u003e\n\u003cli\u003eAir-balanced first stage diaphragm delivers constant and effortless airflow unaffected by depth, tank pressure, or breathing rate\u003c\/li\u003e\n\u003cli\u003eEnvironmentally sealed system prevents water and pollutants from fouling the inner mechanism and is extremely resistant to freezing\u003c\/li\u003e\n\u003cli\u003eDry chamber is equipped with a double spring making it more compact and reliable.\u003c\/li\u003e\n\u003cli\u003eTwo opposing high pressure ports allow the first stage to be positioned either up or down, plus provide for an optimum hose\/transmitter layout\u003c\/li\u003e\n\u003cli\u003eSwivel turret comes with four High-Flow LP ports plus one axial Super High-Flow LP port to maximize hose routing options for technical diving layouts\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"field-item even\"\u003e\n\u003cdiv class=\"description-content\"\u003e\n\u003cdiv class=\"commerce-product-field commerce-product-field-field-shortdescription field-field-shortdescription node-4702811-product-field-shortdescription\"\u003e\n\u003cdiv class=\"field field-name-field-shortdescription field-type-text-long field-label-above\"\u003e\n\u003ch5 class=\"field-items\"\u003eWhat our Experts Think\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli data-section-id=\"1qfmq7b\" data-start=\"521\" data-end=\"736\"\u003e\n\u003cstrong data-start=\"523\" data-end=\"561\"\u003eOutstanding cold-water performance\u003c\/strong\u003e – Environmentally sealed balanced diaphragm first stage resists freezing and prevents contaminants from entering the internal mechanism. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1efzbzr\" data-start=\"737\" data-end=\"933\"\u003e\n\u003cstrong data-start=\"739\" data-end=\"768\"\u003ePremium breathing comfort\u003c\/strong\u003e – The all-metal A700 second stage provides exceptionally smooth inhalation and effortless exhalation in all diving conditions. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"88s3dd\" data-start=\"934\" data-end=\"1125\"\u003e\n\u003cstrong data-start=\"936\" data-end=\"971\"\u003eConsistent airflow at any depth\u003c\/strong\u003e – Air-balanced first and second stages maintain reliable performance regardless of tank pressure or breathing rate. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1wjhai2\" data-start=\"1126\" data-end=\"1299\"\u003e\n\u003cstrong data-start=\"1128\" data-end=\"1148\"\u003eFully adjustable\u003c\/strong\u003e – Diver-adjustable inhalation effort and VIVA control allow precise tuning for comfort and free-flow prevention. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"m8y3wv\" data-start=\"1300\" data-end=\"1488\"\u003e\n\u003cstrong data-start=\"1302\" data-end=\"1328\"\u003eOptimized hose routing\u003c\/strong\u003e – Swivel turret with multiple high-flow LP ports makes it ideal for streamlined recreational and technical diving setups. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"bj0hr3\" data-start=\"1489\" data-end=\"1685\"\u003e\n\u003cstrong data-start=\"1491\" data-end=\"1508\"\u003eBuilt to last\u003c\/strong\u003e – Marine-grade chrome-plated brass construction and premium engineering deliver years of dependable performance in demanding environments. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1tzqvtn\" data-start=\"1686\" data-end=\"1876\"\u003e\n\u003cstrong data-start=\"1688\" data-end=\"1709\"\u003eNitrox compatible\u003c\/strong\u003e – Ready for use with up to \u003cstrong data-start=\"1737\" data-end=\"1751\"\u003e40% Nitrox\u003c\/strong\u003e right out of the box, offering added versatility for recreational and advanced divers.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5 class=\"field-items\"\u003e\n\u003cbr\u003eQ\u0026amp;A\u003c\/h5\u003e\n\u003cdiv class=\"qMYqUG_convSearchResultHighlightRoot\"\u003e\n\u003cdiv class=\"\" data-turn-id-container=\"97c61160-3359-4380-ab77-f51dee877c37\" data-is-intersecting=\"true\"\u003e\n\u003csection class=\"text-token-text-primary w-full focus:outline-none has-data-writing-block:pointer-events-none [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-(--sticky-padding-top)\" dir=\"auto\" data-turn-id=\"97c61160-3359-4380-ab77-f51dee877c37\" data-turn-id-container=\"97c61160-3359-4380-ab77-f51dee877c37\" data-testid=\"conversation-turn-35\" data-turn=\"user\"\u003e\u003c\/section\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"\" data-turn-id-container=\"request-WEB:010f4f80-e1c1-461f-ba44-5b8fe12e1cff-17\" data-is-intersecting=\"true\"\u003e\n\u003csection class=\"text-token-text-primary w-full focus:outline-none has-data-writing-block:pointer-events-none [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" data-turn-id=\"request-WEB:010f4f80-e1c1-461f-ba44-5b8fe12e1cff-17\" data-turn-id-container=\"request-WEB:010f4f80-e1c1-461f-ba44-5b8fe12e1cff-17\" data-testid=\"conversation-turn-36\" data-turn=\"assistant\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-3 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"\u003e\n\u003cdiv data-conversation-screenshot-content=\"\" class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv data-message-author-role=\"assistant\" data-message-id=\"9b6eb093-3e37-432b-9566-6995c39b47b8\" data-turn-start-message=\"true\" dir=\"auto\" data-message-model-slug=\"gpt-5-5\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+\u0026amp;]:mt-1\" tabindex=\"0\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert wrap-break-word w-full light markdown-new-styling\"\u003e\n\u003cp data-start=\"0\" data-end=\"331\"\u003e\u003cstrong data-start=\"0\" data-end=\"72\"\u003eQ: What is the Scubapro MK19 EVO\/A700 Regulator System (REG391 INT)?\u003c\/strong\u003e\u003cbr data-start=\"72\" data-end=\"75\"\u003eA: It is a premium scuba regulator system combining the environmentally sealed MK19 EVO first stage with the all-metal A700 second stage, delivering exceptional breathing performance in warm, temperate, and cold water. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"333\" data-end=\"616\"\u003e\u003cstrong data-start=\"333\" data-end=\"383\"\u003eQ: What makes the MK19 EVO first stage unique?\u003c\/strong\u003e\u003cbr data-start=\"383\" data-end=\"386\"\u003eA: The air-balanced diaphragm first stage features a sealed dry chamber that resists freezing and prevents water, silt, and contaminants from entering the mechanism for dependable performance. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"618\" data-end=\"879\"\u003e\u003cstrong data-start=\"618\" data-end=\"672\"\u003eQ: What are the benefits of the A700 second stage?\u003c\/strong\u003e\u003cbr data-start=\"672\" data-end=\"675\"\u003eA: The handcrafted full-metal A700 offers smooth, effortless breathing, adjustable inhalation effort, and excellent heat exchange for enhanced cold-water performance. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"881\" data-end=\"1139\"\u003e\u003cstrong data-start=\"881\" data-end=\"937\"\u003eQ: Is this regulator suitable for cold-water diving?\u003c\/strong\u003e\u003cbr data-start=\"937\" data-end=\"940\"\u003eA: Yes. The sealed MK19 EVO first stage and metal A700 second stage are specifically engineered for reliable performance in cold and demanding dive environments. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"1141\" data-end=\"1374\"\u003e\u003cstrong data-start=\"1141\" data-end=\"1190\"\u003eQ: What does the INT (Yoke) connection offer?\u003c\/strong\u003e\u003cbr data-start=\"1190\" data-end=\"1193\"\u003eA: The INT (Yoke) connection fits standard recreational scuba cylinders, making it compatible with most rental and dive center tanks worldwide. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"1376\" data-end=\"1633\" data-is-last-node=\"\" data-is-only-node=\"\"\u003e\u003cstrong data-start=\"1376\" data-end=\"1421\"\u003eQ: Who is this regulator best suited for?\u003c\/strong\u003e\u003cbr data-start=\"1421\" data-end=\"1424\"\u003eA: It's ideal for advanced recreational, technical, and professional divers seeking premium breathing performance, rugged durability, and reliable all-condition operation. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch5 class=\"field-items\"\u003eMaintenance Tips\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli data-section-id=\"1p5q1v3\" data-start=\"0\" data-end=\"190\"\u003eRinse thoroughly with fresh water after every dive, keeping the first stage dust cap securely in place to prevent water from entering the regulator. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1092htl\" data-start=\"191\" data-end=\"336\"\u003eRinse only while the regulator is pressurized or ensure the dust cap is properly sealed before rinsing. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1qtz7ih\" data-start=\"337\" data-end=\"518\"\u003eLightly operate the purge button and adjust the inhalation control and VIVA lever during rinsing to remove salt and sand from moving parts. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1wgl8cd\" data-start=\"519\" data-end=\"672\"\u003eAllow the regulator to air dry completely in a shaded, well-ventilated area away from direct sunlight and heat. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1jjqu5f\" data-start=\"673\" data-end=\"775\"\u003eStore with hoses loosely coiled to prevent kinks and avoid placing heavy objects on the regulator.\u003c\/li\u003e\n\u003cli data-section-id=\"1y1kai1\" data-start=\"776\" data-end=\"932\"\u003eInspect hoses, mouthpiece, O-rings, and fittings regularly for cracks, leaks, corrosion, or wear before each dive. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"110g04i\" data-start=\"933\" data-end=\"1053\"\u003eAvoid exposure to sand, oils, solvents, chlorine, and harsh chemicals that can damage seals and internal components.\u003c\/li\u003e\n\u003cli data-section-id=\"o8zlyw\" data-start=\"1054\" data-end=\"1244\" data-is-last-node=\"\"\u003eHave the MK19 EVO first stage and A700 second stage professionally serviced at least annually or according to the manufacturer's recommended schedule.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Scubapro","offers":[{"title":"Default Title","offer_id":45807277047999,"sku":"REG391 INT","price":974.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0683\/5703\/0079\/files\/SP_12719010_A700_MK19_1.jpg?v=1783015191","url":"https:\/\/www.mybackyardzone.com\/products\/scubapro-mk19-evo-a700-scuba-dive-regulator-system","provider":"Your Outdoor Setup Starts Here","version":"1.0","type":"link"}