{"product_id":"scubapro-mk19-evo-din-300-1st-stage-regulator-scuba-diving","title":"ScubaPro MK19 EVO DIN 300 1st Stage Regulator SCUBA Diving - REG434 DIN","description":"\u003ch2\u003eScubaPro MK19 EVO DIN 300 1st Stage Regulator SCUBA Diving - REG434 DIN\u003c\/h2\u003e\n\u003cp\u003eThe compact, lightweight ScubaPro MK19 EVO 1st Stage Regulator delivers consistent and seamless airflow, regardless of depth, tank pressure, or breathing rate. Its air-balanced diaphragm ensures greater performance with higher airflow and extended depth compared to similar products. Its swivel and dry chamber combination meets the requirements of even the most demanding tech divers. MK19 EVO is designed to be the ultimate first stage for cold water or contaminated diving conditions.\u003c\/p\u003e\n\u003ch5\u003eFeatures\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eEnvironmentally sealed, preventing water and pollutants from entering the inner mechanism.\u003c\/li\u003e\n\u003cli\u003eDry ambient pressure chamber that enhances freezing resistance while ensuring consistent airflow and maximum durability in the coldest conditions\u003c\/li\u003e\n\u003cli\u003eSwivel turret and five LP ports which maximize hose routing options.\u003c\/li\u003e\n\u003cli\u003eBuilt not only for professional, military and technical divers, but also for recreational divers.\u003c\/li\u003e\n\u003cli\u003eSuperb cold water performance in a lightweight, small, compact size.\u003c\/li\u003e\n\u003cli\u003eLatest design makes it substantially smaller and lighter than the original MK19.\u003c\/li\u003e\n\u003cli\u003eNew dry chamber is equipped with a double spring making it more compact and reliable.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003eWhat our Experts Think\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli data-section-id=\"1cfs2gf\" data-start=\"28\" data-end=\"171\"\u003e\n\u003cstrong data-start=\"30\" data-end=\"75\"\u003eHigh-end cold-water first stage regulator\u003c\/strong\u003e, engineered for divers who need maximum reliability in demanding environments and deep dives.\u003c\/li\u003e\n\u003cli data-section-id=\"14biwdm\" data-start=\"172\" data-end=\"331\"\u003e\n\u003cstrong data-start=\"174\" data-end=\"210\"\u003eMK19 EVO sealed diaphragm design\u003c\/strong\u003e protects internal components from salt, sand, and freezing water, ensuring consistent performance in harsh conditions.\u003c\/li\u003e\n\u003cli data-section-id=\"1j6c0u5\" data-start=\"332\" data-end=\"473\"\u003e\n\u003cstrong data-start=\"334\" data-end=\"389\"\u003eCompact, lightweight body with excellent durability\u003c\/strong\u003e, making it ideal for travel, technical setups, and heavy-use recreational diving.\u003c\/li\u003e\n\u003cli data-section-id=\"ejgy09\" data-start=\"474\" data-end=\"602\"\u003e\n\u003cstrong data-start=\"476\" data-end=\"511\"\u003eOutstanding breathing stability\u003c\/strong\u003e, delivering smooth airflow regardless of depth, tank pressure, or high breathing demand.\u003c\/li\u003e\n\u003cli data-section-id=\"188w4u\" data-start=\"603\" data-end=\"743\"\u003e\n\u003cstrong data-start=\"605\" data-end=\"669\"\u003eOptimized port layout (rotating turret + angled LP\/HP ports)\u003c\/strong\u003e allows clean hose routing for streamlined and technical configurations.\u003c\/li\u003e\n\u003cli data-section-id=\"1v2alp1\" data-start=\"744\" data-end=\"907\"\u003e\n\u003cstrong data-start=\"746\" data-end=\"850\"\u003eFactory-balanced performance for cold water (EN250A rated when paired with compatible second stages)\u003c\/strong\u003e ensures dependable airflow even in extreme conditions.\u003c\/li\u003e\n\u003cli data-section-id=\"1m34pno\" data-start=\"908\" data-end=\"1042\" data-is-last-node=\"\"\u003e\n\u003cstrong data-start=\"910\" data-end=\"945\"\u003eA top choice for serious divers\u003c\/strong\u003e who want premium ScubaPro engineering with a focus on control, safety, and long-term durability.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\n\u003cbr\u003eQ\u0026amp;A\u003c\/h5\u003e\n\u003cp data-start=\"0\" data-end=\"300\"\u003e\u003cstrong data-start=\"0\" data-end=\"76\"\u003eQ: What is the ScubaPro MK19 EVO DIN 300 First Stage Regulator (REG434)?\u003c\/strong\u003e\u003cbr data-start=\"76\" data-end=\"79\"\u003eA: It is a compact, high-performance balanced diaphragm first stage designed for cold water, technical, and demanding diving conditions, delivering consistent airflow at all depths. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"302\" data-end=\"598\"\u003e\u003cstrong data-start=\"302\" data-end=\"356\"\u003eQ: Is the MK19 EVO suitable for cold water diving?\u003c\/strong\u003e\u003cbr data-start=\"356\" data-end=\"359\"\u003eA: Yes. It is environmentally sealed with a dry chamber that prevents water, sand, and contaminants from entering, providing excellent freeze resistance and reliability in cold or harsh environments. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"600\" data-end=\"853\"\u003e\u003cstrong data-start=\"600\" data-end=\"648\"\u003eQ: What breathing performance does it offer?\u003c\/strong\u003e\u003cbr data-start=\"648\" data-end=\"651\"\u003eA: Its balanced diaphragm design ensures stable, effortless airflow regardless of depth, tank pressure, or breathing rate, making it highly consistent underwater. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"855\" data-end=\"1086\"\u003e\u003cstrong data-start=\"855\" data-end=\"899\"\u003eQ: How does the DIN 300 connection help?\u003c\/strong\u003e\u003cbr data-start=\"899\" data-end=\"902\"\u003eA: The DIN 300 connection screws directly into the cylinder valve, offering a more secure, compact, and high-pressure-rated seal compared to yoke systems, ideal for technical diving.\u003c\/p\u003e\n\u003cp data-start=\"1088\" data-end=\"1322\"\u003e\u003cstrong data-start=\"1088\" data-end=\"1133\"\u003eQ: Does it support flexible hose routing?\u003c\/strong\u003e\u003cbr data-start=\"1133\" data-end=\"1136\"\u003eA: Yes. It features a swivel turret and multiple low-pressure ports, allowing optimized and clean hose configurations for different diving setups. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"1324\" data-end=\"1579\" data-is-last-node=\"\" data-is-only-node=\"\"\u003e\u003cstrong data-start=\"1324\" data-end=\"1369\"\u003eQ: Who is this regulator best suited for?\u003c\/strong\u003e\u003cbr data-start=\"1369\" data-end=\"1372\"\u003eA: It is ideal for advanced recreational, technical, wreck, and cold-water divers who need durability, precision airflow, and high reliability in challenging conditions.\u003c\/p\u003e\n\u003ch5\u003e\n\u003cbr\u003eMaintenance Tips\u003c\/h5\u003e\n\u003cdiv class=\"qMYqUG_convSearchResultHighlightRoot\"\u003e\n\u003cdiv class=\"\" data-turn-id-container=\"request-6a45414b-949c-83ee-8c89-696580635844-5\" 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-6a45414b-949c-83ee-8c89-696580635844-5\" data-turn-id-container=\"request-6a45414b-949c-83ee-8c89-696580635844-5\" data-testid=\"conversation-turn-154\" data-turn=\"assistant\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--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=\"30b8af24-aa8d-4124-b668-6ac868bd4797\" data-turn-start-message=\"true\" dir=\"auto\" data-message-model-slug=\"gpt-5-3-mini\" 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\u003cul data-start=\"22\" data-end=\"1145\" data-is-last-node=\"\" data-is-only-node=\"\"\u003e\n\u003cli data-section-id=\"47my5u\" data-start=\"22\" data-end=\"244\"\u003eRinse the regulator thoroughly with fresh water after every dive, ideally while the first stage is still pressurized. If disconnected, ensure the DIN dust cap is securely fitted before rinsing to prevent water ingress.\u003c\/li\u003e\n\u003cli data-section-id=\"1dzgcxy\" data-start=\"245\" data-end=\"372\"\u003eAllow all components to air dry completely in a cool, shaded area before storage to prevent corrosion and moisture buildup.\u003c\/li\u003e\n\u003cli data-section-id=\"32tpau\" data-start=\"373\" data-end=\"537\"\u003eInspect the MK19 EVO DIN first stage, hoses, DIN connection, O-rings, filter, and second stage attachments before each dive for signs of wear, leaks, or damage.\u003c\/li\u003e\n\u003cli data-section-id=\"1uuh0ep\" data-start=\"538\" data-end=\"706\"\u003eKeep the dry-sealed diaphragm system clean and free from sand, salt, and debris to maintain consistent cold-water performance. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1kqxa4a\" data-start=\"707\" data-end=\"840\"\u003eTest the regulator’s airflow and second-stage operation before diving to ensure smooth breathing and proper function of controls.\u003c\/li\u003e\n\u003cli data-section-id=\"g0jhdl\" data-start=\"841\" data-end=\"988\"\u003eStore the regulator in a padded gear bag with hoses loosely coiled, away from direct sunlight, heat, chemicals, and heavy pressure on fittings.\u003c\/li\u003e\n\u003cli data-section-id=\"2ozva2\" data-start=\"989\" data-end=\"1145\" data-is-last-node=\"\"\u003eHave the MK19 EVO professionally serviced at manufacturer-recommended intervals by an authorized SCUBAPRO technician to ensure safe, reliable performance.\u003c\/li\u003e\n\u003c\/ul\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","brand":"Scubapro","offers":[{"title":"DIN","offer_id":45807395766463,"sku":"REG434 DIN","price":389.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0683\/5703\/0079\/files\/612LjOmNoXL._AC_SL1400.jpg?v=1783016618","url":"https:\/\/www.mybackyardzone.com\/products\/scubapro-mk19-evo-din-300-1st-stage-regulator-scuba-diving","provider":"Your Outdoor Setup Starts Here","version":"1.0","type":"link"}