{"product_id":"tankless-water-heater-service-valve-kit-3-4-npt-to-ptc-isolation-valves-pressure-relief-lead-free-brass","title":"Tankless Water Heater Service Valve Kit – 3\/4” NPT to PTC Isolation Valves + Pressure Relief, Lead-Free Brass","description":"\u003c!-- 商品描述核心区块 - 所有样式均封装在 .heater-kit-wrapper 前缀下，避免与商店主题冲突 --\u003e\n\u003cdiv class=\"heater-kit-wrapper\"\u003e\n\u003cdiv class=\"hk-container\"\u003e\n\u003c!-- 产品标题（展示给用户） --\u003e\u003c!-- 产品概述：自然销售描述，解决痛点，目标人群 --\u003e\n\u003cdiv class=\"hk-summary\"\u003e\n\u003cp\u003e💧 \u003cstrong\u003eStop piecing together mismatched fittings — this all-in-one service valve kit has everything you need to install or service your tankless water heater correctly, safely, and to code.\u003c\/strong\u003e Whether you’re a DIY homeowner replacing an old unit, a plumber looking for a reliable kit, or a property manager maintaining multiple properties, this 3\/4” kit eliminates guesswork. It includes two isolation valves (hot and cold) with PTC quick-connect fittings, a pressure relief valve, and thread seal tape — all crafted from durable, lead-free brass and SUS304 stainless steel. The standard NPT threads fit most gas tankless water heaters from brands like Rinnai, Navien, Rheem, and Noritz. The isolation valves allow you to flush your heater with vinegar to remove scale (essential for longevity), while the pressure relief valve adds essential safety. Save time, money, and future headaches with a complete, leak-free solution for bathrooms, boiler rooms, or kitchens.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- 产品特点：竖向排列（SEO友好，嵌入长尾关键词） --\u003e\n\u003cdiv class=\"hk-features\"\u003e\n\u003ch2 class=\"hk-section-title\"\u003e⭐ Why This 3\/4” Tankless Water Heater Service Valve Kit Is Essential\u003c\/h2\u003e\n\u003cdiv class=\"hk-feature\"\u003e\n\u003cdiv class=\"hk-feature-icon\"\u003e🧰\u003c\/div\u003e\n\u003cdiv class=\"hk-feature-content\"\u003e\n\u003ch3\u003eAll-in-One Kit – Everything You Need in One Box\u003c\/h3\u003e\n\u003cp\u003eIncludes 2x 3\/4” NPT to 3\/4” PTC isolation valves (hot \u0026amp; cold), 1x pressure relief valve (safety release), and thread seal tape. No additional trips to the hardware store. Each component is pre-assembled and tested for a hassle-free installation. Perfect for both new installs and retrofits.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hk-feature\"\u003e\n\u003cdiv class=\"hk-feature-icon\"\u003e🛡️\u003c\/div\u003e\n\u003cdiv class=\"hk-feature-content\"\u003e\n\u003ch3\u003eLead-Free Brass \u0026amp; SUS304 – Safe \u0026amp; Corrosion-Resistant\u003c\/h3\u003e\n\u003cp\u003eAll wetted parts are made from high-quality lead-free brass (meets federal safe drinking water standards) and SUS304 stainless steel. This ensures no heavy metal leaching, excellent resistance to corrosion and mineral buildup, and long-term leak protection. Built to withstand high temperatures and pressure.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hk-feature\"\u003e\n\u003cdiv class=\"hk-feature-icon\"\u003e🔧\u003c\/div\u003e\n\u003cdiv class=\"hk-feature-content\"\u003e\n\u003ch3\u003eEasy DIY Installation – Standard 3\/4” Connections\u003c\/h3\u003e\n\u003cp\u003eUses industry-standard 3\/4” NPT threads on one side and 3\/4” PTC (push-to-connect) on the other. The included thread seal tape ensures a secure, leak-free seal. No special tools required — just hand-tighten the brass nuts and push the PTC fittings onto your heater's water lines. Compatible with most gas tankless water heaters.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hk-feature\"\u003e\n\u003cdiv class=\"hk-feature-icon\"\u003e🔄\u003c\/div\u003e\n\u003cdiv class=\"hk-feature-content\"\u003e\n\u003ch3\u003eIsolation Valves for Easy Flushing \u0026amp; Maintenance\u003c\/h3\u003e\n\u003cp\u003eThe two isolation valves allow you to shut off water to the heater without cutting off the whole house supply. Connect a pump and descaling solution (vinegar) through the service ports to remove lime scale — a critical step for extending heater life. No need to call a plumber for routine maintenance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hk-feature\"\u003e\n\u003cdiv class=\"hk-feature-icon\"\u003e⚠️\u003c\/div\u003e\n\u003cdiv class=\"hk-feature-content\"\u003e\n\u003ch3\u003ePressure Relief Valve Included – Safety First\u003c\/h3\u003e\n\u003cp\u003eThe kit comes with a factory-set pressure relief valve (typically 150 PSI) that automatically releases excess pressure to prevent tank or pipe bursts. This is required by code for most tankless water heater installations. Having it in the kit saves you $20–30 and ensures compliance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 规格参数表格 --\u003e\n\u003cdiv class=\"hk-specs\"\u003e\n\u003ch2 class=\"hk-section-title\"\u003e📐 Technical Specifications – Tankless Water Heater Service Valve Kit\u003c\/h2\u003e\n\u003cdiv class=\"hk-table-wrapper\"\u003e\n\u003ctable class=\"hk-specs-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eItem Code\u003c\/th\u003e\n\u003ctd\u003eT3342P479428\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eProduct Type\u003c\/th\u003e\n\u003ctd\u003eSingle Box Product – Service Valve Kit for Tankless Water Heaters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eLead-Free Brass + SUS304 Stainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eColor\u003c\/th\u003e\n\u003ctd\u003eBrass \/ Coppery\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eConnections\u003c\/th\u003e\n\u003ctd\u003e3\/4” NPT female to 3\/4” PTC (push-to-connect) on isolation valves; 3\/4” NPT on relief valve\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eIncluded Components\u003c\/th\u003e\n\u003ctd\u003e2x Isolation Valves (hot\/cold), 1x Pressure Relief Valve, Thread Seal Tape\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaximum Working Pressure\u003c\/th\u003e\n\u003ctd\u003e150 PSI (relief valve set point)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTemperature Range\u003c\/th\u003e\n\u003ctd\u003e33°F – 210°F (suitable for tankless water heaters)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eProduct Dimensions (L×W×H)\u003c\/th\u003e\n\u003ctd\u003e9.45” × 7.48” × 3.94”\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eProduct Weight\u003c\/th\u003e\n\u003ctd\u003e3.44 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePackage Dimensions\u003c\/th\u003e\n\u003ctd\u003e9.45” × 7.48” × 3.94”\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePackage Weight\u003c\/th\u003e\n\u003ctd\u003e3.54 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCompatibility\u003c\/th\u003e\n\u003ctd\u003eMost gas tankless water heaters (Rinnai, Navien, Rheem, Noritz, EcoSmart, etc.)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCertification\u003c\/th\u003e\n\u003ctd\u003eLead-free compliant (safe for potable water)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- FAQ 常见问题（完全展开，无折叠） --\u003e\n\u003cdiv class=\"hk-faq\"\u003e\n\u003ch2 class=\"hk-section-title\"\u003e❓ Frequently Asked Questions – Tankless Water Heater Service Valve Kit\u003c\/h2\u003e\n\u003cdiv class=\"hk-faq-item\"\u003e\n\u003ch3\u003e❝ Will this kit fit my specific brand of tankless water heater? ❞\u003c\/h3\u003e\n\u003cp\u003eYes — this kit uses standard 3\/4” NPT threads on the valve side and 3\/4” PTC (push-to-connect) fittings on the heater side. Most major brands (Rinnai, Navien, Rheem, Noritz, Takagi, EcoSmart, Stiebel Eltron) use 3\/4” water connections. The PTC fittings work with PEX, CPVC, or copper pipes of the same diameter. If your heater has 1\/2” connections, you’ll need an adapter (not included). Check your heater’s manual.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hk-faq-item\"\u003e\n\u003ch3\u003e❝ Is the brass truly lead-free? Is it safe for drinking water? ❞\u003c\/h3\u003e\n\u003cp\u003eAbsolutely. The brass used in this kit complies with the Safe Drinking Water Act and NSF\/ANSI 61 standards. Lead content is less than 0.25% (the federal definition of “lead-free”). It’s perfectly safe for potable water systems, including whole-house tankless heaters that supply kitchen and bathroom faucets.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hk-faq-item\"\u003e\n\u003ch3\u003e❝ Do I need any additional tools or materials for installation? ❞\u003c\/h3\u003e\n\u003cp\u003eNo — the kit includes thread seal tape. You will need basic tools: an adjustable wrench for the brass nuts, and a pipe cutter\/deburring tool if you’re cutting PEX or copper. The PTC fittings require no special tools — just push the pipe in fully. For gas connections, you will need a separate gas line kit (not included). This kit covers the water side only.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hk-faq-item\"\u003e\n\u003ch3\u003e❝ What is the purpose of the pressure relief valve? Is it required? ❞\u003c\/h3\u003e\n\u003cp\u003eThe pressure relief valve (PRV) automatically releases water if pressure exceeds 150 PSI, preventing dangerous bursts or leaks. Most local plumbing codes require a PRV on any tankless water heater installation. This kit includes a high-quality brass PRV — buying it separately would cost $20-30. It’s pre-calibrated and ready to install.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hk-faq-item\"\u003e\n\u003ch3\u003e❝ Can I use these valves to flush my tankless heater for descaling? ❞\u003c\/h3\u003e\n\u003cp\u003eYes — that’s one of the main benefits. The isolation valves have integral service ports (often with caps). Close both valves, attach a pump and hoses to the ports, and circulate descaling solution (vinegar) through the heat exchanger. This removes lime scale and restores efficiency. Flushing once a year is recommended for areas with hard water.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 简短信任标识（无外部依赖） --\u003e\n\u003cdiv class=\"hk-trust\"\u003e\n\u003cspan\u003e✅ Lead-Free Certified\u003c\/span\u003e \u003cspan\u003e🔧 Complete Kit – No Extra Parts\u003c\/span\u003e \u003cspan\u003e🛡️ Pressure Relief Included\u003c\/span\u003e \u003cspan\u003e📦 Fast US Shipping\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cstyle\u003e\n\/* 完全封装的样式，类名前缀 .heater-kit-wrapper 避免污染商店主题 *\/\n.heater-kit-wrapper {\n    max-width: 100%;\n    margin: 0;\n    padding: 0;\n    box-sizing: border-box;\n    font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;\n    line-height: 1.5;\n    color: #1e2f2c;\n    background: transparent;\n}\n.heater-kit-wrapper *,\n.heater-kit-wrapper *::before,\n.heater-kit-wrapper *::after {\n    box-sizing: inherit;\n}\n.hk-container {\n    width: 100%;\n    background: #ffffff;\n    padding: 1.8rem 1.5rem;\n    border-radius: 0;\n    box-shadow: none;\n}\n@media (max-width: 768px) {\n    .hk-container {\n        padding: 1.2rem 1rem;\n    }\n}\n.hk-product-title {\n    font-size: 1.9rem;\n    font-weight: 700;\n    margin: 0 0 0.75rem 0;\n    line-height: 1.3;\n    letter-spacing: -0.01em;\n    color: #1e3a3a;\n    border-left: 5px solid #b87333;\n    padding-left: 1rem;\n}\n@media (max-width: 640px) {\n    .hk-product-title {\n        font-size: 1.6rem;\n    }\n}\n.hk-summary {\n    background: #fef8f0;\n    padding: 1.4rem 1.6rem;\n    border-radius: 24px;\n    margin: 1.2rem 0 1.8rem 0;\n    font-size: 1rem;\n    color: #5a3e1b;\n    border: 1px solid #f0e0cc;\n}\n.hk-summary p {\n    margin: 0;\n    line-height: 1.55;\n}\n.hk-features {\n    margin: 2rem 0 2rem 0;\n}\n.hk-section-title {\n    font-size: 1.7rem;\n    font-weight: 700;\n    margin: 1.5rem 0 1.2rem 0;\n    color: #1a3f3a;\n    border-bottom: 3px solid #e9eef3;\n    padding-bottom: 0.6rem;\n}\n@media (max-width: 640px) {\n    .hk-section-title {\n        font-size: 1.5rem;\n    }\n}\n.hk-feature {\n    display: flex;\n    gap: 1rem;\n    margin-bottom: 2rem;\n    align-items: flex-start;\n    background: #ffffff;\n    padding: 0.2rem 0;\n}\n.hk-feature-icon {\n    font-size: 2rem;\n    min-width: 3rem;\n    text-align: center;\n    padding-top: 0.2rem;\n}\n.hk-feature-content h3 {\n    font-size: 1.25rem;\n    font-weight: 600;\n    margin: 0 0 0.4rem 0;\n    color: #2c5a5e;\n}\n.hk-feature-content p {\n    margin: 0;\n    color: #2e6b6b;\n    line-height: 1.5;\n}\n.hk-table-wrapper {\n    overflow-x: auto;\n    margin: 1rem 0 1.8rem 0;\n    border-radius: 20px;\n    border: 1px solid #e9edf2;\n}\n.hk-specs-table {\n    width: 100%;\n    border-collapse: collapse;\n    font-size: 0.95rem;\n    background: #ffffff;\n    min-width: 480px;\n}\n.hk-specs-table th,\n.hk-specs-table td {\n    text-align: left;\n    padding: 0.9rem 1rem;\n    border-bottom: 1px solid #edf2f7;\n    vertical-align: top;\n}\n.hk-specs-table th {\n    background-color: #fafcfd;\n    font-weight: 600;\n    width: 38%;\n    color: #1e4e52;\n}\n.hk-specs-table td {\n    color: #2d7072;\n    background-color: #ffffff;\n}\n.hk-specs-table tr:last-child td,\n.hk-specs-table tr:last-child th {\n    border-bottom: none;\n}\n.hk-faq {\n    margin: 2rem 0 1rem 0;\n}\n.hk-faq-item {\n    margin-bottom: 1.8rem;\n    border-bottom: 1px solid #eef2f0;\n    padding-bottom: 1.2rem;\n}\n.hk-faq-item h3 {\n    font-size: 1.1rem;\n    font-weight: 600;\n    margin: 0 0 0.5rem 0;\n    color: #1e5a5c;\n}\n.hk-faq-item p {\n    margin: 0;\n    color: #2e7677;\n    line-height: 1.55;\n}\n.hk-trust {\n    display: flex;\n    flex-wrap: wrap;\n    gap: 1.5rem;\n    justify-content: center;\n    margin-top: 2rem;\n    padding-top: 1.2rem;\n    border-top: 1px solid #eef2f0;\n    font-size: 0.85rem;\n    font-weight: 500;\n    color: #3b8585;\n}\n.hk-trust span {\n    display: inline-flex;\n    align-items: center;\n    gap: 0.3rem;\n}\n\u003c\/style\u003e","brand":"HomeDIYer","offers":[{"title":"Default Title","offer_id":52163285909778,"sku":"T3342P479428","price":87.7,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/9e54cb96fdc14e57746a253ce595c235.jpg?v=1775202980","url":"https:\/\/homediyer.com\/products\/tankless-water-heater-service-valve-kit-3-4-npt-to-ptc-isolation-valves-pressure-relief-lead-free-brass","provider":"HomeDIYer","version":"1.0","type":"link"}