{"product_id":"novino-rv-vacuum-breaker-check-valve-1-2-npt-brass-anti-siphon-backflow-preventer-for-black-tank-flushes","title":"NOVINO RV Vacuum Breaker Check Valve 1\/2\" NPT Brass — Anti-Siphon Backflow Preventer for Black Tank Flushes","description":"\u003cp\u003e\u003cstrong\u003eNOVINO's brass RV vacuum breaker check valve is a one-way backflow preventer designed to stop black-tank water from siphoning into your freshwater line during black tank flushes.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe NOVINO 571-VAC-CHK-A replaces worn or leaking anti-siphon valves in RVs, campers, trailers and motorhomes to protect your freshwater supply during black-tank flush operations. Made for 1\/2\" NPT inlet and outlet connections, this brass valve operates across a wide pressure range and installs inline at the flusher connection. If you hear noises under the sink, notice floor wetness after flushing, or detect foul smells that trace back to the black-tank flush, a failed vacuum breaker is a common cause—and this replacement part solves that problem quickly.\u003c\/p\u003e\n\n\u003ch3\u003eHow will this check valve stop cross-contamination in my RV?\u003c\/h3\u003e\n\u003cp\u003eThe NOVINO vacuum breaker is a one-way check valve that prevents wastewater or sewer tank contents from flowing back toward the freshwater source during a black-tank flush. It sits between the freshwater inlet and the tank flusher and allows water outward while blocking reverse flow.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eOne-way brass construction resists corrosion and holds a tight seal.\u003c\/li\u003e\n  \u003cli\u003ePrevents backflow and back-siphonage from the black tank into potable lines.\u003c\/li\u003e\n  \u003cli\u003eInstalls inline at the flush connection for simple protection.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this fit my RV's black tank flushing system and what are the specs?\u003c\/h3\u003e\n\u003cp\u003eThis NOVINO valve is built for common RV systems with 1\/2\" NPT male threads on both inlet and outlet, making it compatible with many flusher assemblies and adapters. It works reliably across typical RV water pressures to match factory and aftermarket setups.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eOEM part number: 571-VAC-CHK-A for straightforward replacement identification.\u003c\/li\u003e\n  \u003cli\u003eConnection: 1\/2\" NPT male inlet and outlet for standard fittings.\u003c\/li\u003e\n  \u003cli\u003eOperating pressure range: 8–125 PSI suitable for onboard pump and campground pressure.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do I know when to replace the vacuum breaker and how to install it correctly?\u003c\/h3\u003e\n\u003cp\u003eCommon signs a vacuum breaker needs replacement include loud noises under the sink, water sprayed or leaked on the floor after a flush, or persistent sewer smells. The valve must be mounted vertically and at least 6 inches above the highest fixture connected to the system to work properly.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eReplace if you notice leaking, floor wetness, or noisy operation during flushing.\u003c\/li\u003e\n  \u003cli\u003eInstall absolutely vertical—incorrect orientation can allow odors or leaks.\u003c\/li\u003e\n  \u003cli\u003ePosition at least 6\" above the highest connected fixture and avoid continuous use beyond 12 hours.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat practical benefits will I see after installing this NOVINO check valve?\u003c\/h3\u003e\n\u003cp\u003eAfter installation you should see cleaner freshwater delivery during flushes and no backflow incidents; the valve protects downstream components and keeps living spaces drier and odor-free. It’s a low-cost replacement that prevents more costly water damage or contamination problems.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eStops black-tank contents from contaminating potable water lines.\u003c\/li\u003e\n  \u003cli\u003eReduces odor and moisture issues in the bathroom and under-sink areas.\u003c\/li\u003e\n  \u003cli\u003eDurable brass construction improves longevity over cheap plastics.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: RV owners, technicians and DIYers who maintain campers, travel trailers, fifth-wheels and motorhomes—especially models that commonly use inline black-tank flushers—will benefit from this NOVINO brass vacuum breaker. It’s particularly useful if you own older units showing signs of a failing check valve (leaks, noises, smells). Installers replacing cracked or leaking vacuum breakers will find the 571-VAC-CHK-A an easy, reliable upgrade that restores backflow protection and keeps freshwater lines safe during black-tank maintenance.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I use this vacuum breaker on any RV black-tank flusher?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes, if your flusher uses 1\/2\" NPT male fittings and operates within 8–125 PSI it will be compatible.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What causes vacuum breaker failures and how often should it be replaced?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Failures come from wear, debris or orientation mistakes; inspect annually and replace if it leaks, makes noise, or causes odors.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"NOVINO","offers":[{"title":"Default Title","offer_id":48086213984414,"sku":"B0DD2N9SGQ","price":49.98,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/novino-front-view-valve.jpg?v=1785889958","url":"https:\/\/northtrailauto.ca\/products\/novino-rv-vacuum-breaker-check-valve-1-2-npt-brass-anti-siphon-backflow-preventer-for-black-tank-flushes","provider":"North Trail Auto","version":"1.0","type":"link"}