{"product_id":"jabsco-hd3-par-max-12v-fresh-water-pump-3-gpm-40-psi-q301j-115s-3a","title":"Jabsco HD3 Par-Max 12V Fresh Water Pump - 3 GPM, 40 PSI, Q301J-115S-3A","description":"\u003cp\u003eThe Jabsco HD3 Par-Max is a 12V diaphragm-type fresh water pump built to deliver on-demand water pressure for onboard plumbing systems, giving boaters a freshwater supply that runs like a home system. A pressure-controlled diaphragm and integrated, sealed pressure switch turn the pump on automatically whenever a tap or fixture opens, then shut it off once system pressure is satisfied. The pump is self-priming and can run dry without damage to the unit, so accidental tank depletion or air in the line will not harm the motor.\u003c\/p\u003e\u003cp\u003eConstruction centers on a heavy duty motor cast in an aluminum housing, built for a long working life under sustained high pressure. An integrated bypass module reduces cycling and smooths out flow delivery, while dampening feet at the mounting base cut vibration for quieter operation. Installation and servicing are simplified with quick-connect ports throughout: the pump comes equipped with an inline 40 mesh quick-connect strainer and two 1\/2 inch quick-connect straight hosebarb fittings, so it drops into standard 1\/2 inch water line runs.\u003c\/p\u003e\u003cp\u003eRated for 3 GPM open flow (11 LPM) at 40 PSI on a 12V DC supply, the Jabsco HD3 Par-Max suits galley, head, and shower plumbing on boats where a compact, quiet, self-priming pump is needed. It is part of the Jabsco Par-Max lineup, which also includes higher-flow HD4 variants for larger demand systems.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Jabsco\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e Q301J-115S-3A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOpen Flow Rate:\u003c\/strong\u003e 3 GPM (11 LPM)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 12V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePressure (Cut-Off):\u003c\/strong\u003e 40 PSI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStrainer:\u003c\/strong\u003e Inline 40 mesh quick-connect strainer\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHosebarb Fittings:\u003c\/strong\u003e 2 x 1\/2 inch quick-connect straight hosebarbs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelf-Priming:\u003c\/strong\u003e Yes, can run dry without damage\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePressure Switch:\u003c\/strong\u003e Integrated, sealed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Black\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Plastic\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Width:\u003c\/strong\u003e 4.29 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 7 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 671880841832\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat flow rate and pressure does this pump deliver?\u003c\/strong\u003e The Jabsco HD3 Par-Max (Q301J-115S-3A) delivers 3 GPM (11 LPM) open flow at a 40 PSI pressure switch cut-off setting.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this pump self-priming?\u003c\/strong\u003e Yes, the HD3 Par-Max is self-priming and can run dry without damage to the pump, which protects it if a tank runs empty or air gets into the line.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat voltage does the Jabsco HD3 Par-Max run on?\u003c\/strong\u003e It runs on a 12V DC electrical system, standard for most boats with a 12-volt house battery bank.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat size hose fittings does it use?\u003c\/strong\u003e The pump ships with two 1\/2 inch quick-connect straight hosebarb fittings, so it connects to standard 1\/2 inch freshwater plumbing line.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the pump include a strainer?\u003c\/strong\u003e Yes, an inline 40 mesh quick-connect strainer is included with the Q301J-115S-3A to filter debris before it reaches the pump.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow does the pump turn on and off automatically?\u003c\/strong\u003e An integrated, sealed pressure switch on the HD3 Par-Max senses when a faucet or fixture opens and cycles the pump on, then shuts it off once line pressure is restored.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the housing made of?\u003c\/strong\u003e The HD3 Par-Max uses a heavy duty motor cast in an aluminum housing for durability, with a plastic pump body and black finish.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does this pump weigh?\u003c\/strong\u003e The Jabsco HD3 Par-Max weighs 7 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this a genuine Jabsco part?\u003c\/strong\u003e Yes, this is the genuine Jabsco HD3 Par-Max pump, part number Q301J-115S-3A, not an aftermarket copy.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow is this different from the Jabsco HD4 Par-Max pump?\u003c\/strong\u003e The HD3 Par-Max (Q301J-115S-3A) is rated for 3 GPM, while the Jabsco HD4 Par-Max line steps up to 4 GPM open flow, with versions available at 40 PSI or 60 PSI cut-off, for systems needing higher volume.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this pump cycle on and off frequently during use?\u003c\/strong\u003e No, the Q301J-115S-3A includes an integrated bypass module that reduces cycling and delivers a smoother, more consistent flow while a fixture is open.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the pump noisy when running?\u003c\/strong\u003e The HD3 Par-Max uses dampening mounting feet to reduce vibration, allowing for quieter operation compared to a pump without vibration isolation.\u003c\/p\u003e","brand":"Jabsco","offers":[{"title":"Default Title","offer_id":49028223697115,"sku":"ITT-Q301J-115S-3A","price":181.96,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/ITT-Q301J-115S-3A__21176.1722492017.500.750.jpg?v=1785164591","url":"https:\/\/www.goodvibesmarina.com\/products\/jabsco-hd3-par-max-12v-fresh-water-pump-3-gpm-40-psi-q301j-115s-3a","provider":"Good Vibes Marina","version":"1.0","type":"link"}