{"product_id":"a-o-smith-40-gallon-tall-natural-gas-water-heater-18-diameter","title":"A.O Smith 40-Gallon Tall Natural Gas Water Heater (18\" Diameter) - Item # 12231959 | Model # GCB-40 SIDE T\u0026P VALVE","description":"\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003eA.O Smith 40-Gallon Tall Natural Gas Water Heater (18\" Diameter) - Item # 12231959 | Model # GCB-40 SIDE T\u0026amp;P VALVE\u003c\/h2\u003e\n\u003cul class=\"content-list left-margin-bullets\"\u003e\n\u003cli\u003e40 Gal\u003c\/li\u003e\n\u003cli\u003eTall\u003c\/li\u003e\n\u003cli\u003e18\" Dia x 61.75\" Height To Vent Connection\u003c\/li\u003e\n\u003cli\u003eTop Water Connections And Side T\u0026amp;P Valve\u003c\/li\u003e\n\u003cli\u003eNot Available In Specific AQMDs In CA\u003c\/li\u003e\n\u003cli\u003eDynaClean Diffuser System Reduces Sediment Buildup, Extending Tank Life\u003c\/li\u003e\n\u003cli\u003eBlue Diamond Tank Lining Provides Protection Against Leaks\u003c\/li\u003e\n\u003cli\u003eEnhanced Honeywell Gas Valve With LED Diagnostics To Ease Troubleshooting And Improve Performance\u003c\/li\u003e\n\u003cli\u003eResettable FVIR Thermal Switch To Quickly And Easily Bring Heater Back Online\u003c\/li\u003e\n\u003cli\u003eCoreGuard Anode Rod Is Industry-Leading Anode Technology To Extend Useful Life\u003c\/li\u003e\n\u003cli\u003eFull-Flow Tamper-Resistant Brass Drain Valve\u003c\/li\u003e\n\u003cli\u003eMeets 2015 NAECA Efficiency Standards\u003c\/li\u003e\n\u003cli\u003e0.65 Uniform Energy Factor\u003c\/li\u003e\n\u003cli\u003e40,000 Btu\u003c\/li\u003e\n\u003cli\u003eMfg #GCB-40 (SIDE T\u0026amp;P VALVE\u003c\/li\u003e\n\u003cli\u003eWater heater blanket included\u003c\/li\u003e\n\u003cli\u003e18\" Dia x 61.75\" Height To Vent Connection\u003c\/li\u003e\n\u003cli\u003eTop Water Connections And Side T\u0026amp;P Valve\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003eWhat our Experts Think\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli data-section-id=\"1f8bom9\" data-start=\"27\" data-end=\"302\"\u003e\n\u003cp data-start=\"29\" data-end=\"302\"\u003e\u003cstrong data-start=\"29\" data-end=\"60\"\u003eSolid everyday performance:\u003c\/strong\u003e A classic \u003cstrong data-start=\"71\" data-end=\"114\"\u003e40‑gallon tall natural gas water heater\u003c\/strong\u003e with \u003cstrong data-start=\"120\" data-end=\"140\"\u003e40,000 BTU input\u003c\/strong\u003e and atmospheric venting delivers consistent hot water for a \u003cstrong data-start=\"201\" data-end=\"227\" data-is-only-node=\"\"\u003ehousehold of ~3 people\u003c\/strong\u003e (first‑hour ratings near ~78 gal). \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"qy3cxd\" data-start=\"304\" data-end=\"525\"\u003e\n\u003cp data-start=\"306\" data-end=\"525\"\u003e\u003cstrong data-start=\"306\" data-end=\"335\"\u003eCorrosion‑resistant tank:\u003c\/strong\u003e \u003cstrong data-start=\"336\" data-end=\"366\"\u003eBlue Diamond® glass lining\u003c\/strong\u003e protects the steel tank from rust, helping extend service life and reduce leaks compared with standard glass coatings. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"shkotx\" data-start=\"527\" data-end=\"734\"\u003e\n\u003cp data-start=\"529\" data-end=\"734\"\u003e\u003cstrong data-start=\"529\" data-end=\"564\"\u003eSediment control for longevity:\u003c\/strong\u003e The \u003cstrong data-start=\"569\" data-end=\"598\"\u003eDynaClean diffuser system\u003c\/strong\u003e helps reduce lime and sediment buildup, extending heater life and maintaining output over time. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1etfq28\" data-start=\"736\" data-end=\"953\"\u003e\n\u003cp data-start=\"738\" data-end=\"953\"\u003e\u003cstrong data-start=\"738\" data-end=\"768\"\u003eDiagnostics \u0026amp; ease of use:\u003c\/strong\u003e \u003cstrong data-start=\"769\" data-end=\"828\"\u003eEnhanced Honeywell gas valve with LED status indicators\u003c\/strong\u003e makes troubleshooting and temperature control easier for homeowners and technicians. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1mzdikp\" data-start=\"955\" data-end=\"1199\"\u003e\n\u003cp data-start=\"957\" data-end=\"1199\"\u003e\u003cstrong data-start=\"957\" data-end=\"989\"\u003eDurable components included:\u003c\/strong\u003e \u003cstrong data-start=\"990\" data-end=\"1013\"\u003eCoreGuard anode rod\u003c\/strong\u003e, \u003cstrong data-start=\"1015\" data-end=\"1063\"\u003efull‑flow tamper‑resistant brass drain valve\u003c\/strong\u003e, and \u003cstrong data-start=\"1069\" data-end=\"1103\" data-is-only-node=\"\"\u003eresettable FVIR thermal switch\u003c\/strong\u003e provide robust protection and long‑lasting reliability. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"2ef1i5\" data-start=\"1201\" data-end=\"1391\"\u003e\n\u003cp data-start=\"1203\" data-end=\"1391\"\u003e\u003cstrong data-start=\"1203\" data-end=\"1234\"\u003eSide‑mounted safety relief:\u003c\/strong\u003e \u003cstrong data-start=\"1235\" data-end=\"1263\"\u003eSide T\u0026amp;P valve placement\u003c\/strong\u003e gives flexible installation options and meets standard residential safety requirements. \u003cspan class=\"\" data-state=\"delayed-open\" aria-describedby=\"radix-_r_92_\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\n\u003cbr\u003eQ\u0026amp;A\u003c\/h5\u003e\n\u003cp data-start=\"103\" data-end=\"275\"\u003e\u003cstrong data-start=\"103\" data-end=\"164\"\u003eQ: What household size is this water heater suitable for?\u003c\/strong\u003e\u003cbr data-start=\"164\" data-end=\"167\"\u003eA: Ideal for \u003cstrong data-start=\"180\" data-end=\"208\"\u003ehouseholds of 2–3 people\u003c\/strong\u003e, providing reliable hot water for showers, sinks, and daily use.\u003c\/p\u003e\n\u003cp data-start=\"277\" data-end=\"395\"\u003e\u003cstrong data-start=\"277\" data-end=\"314\"\u003eQ: What type of fuel does it use?\u003c\/strong\u003e\u003cbr data-start=\"314\" data-end=\"317\"\u003eA: Operates on \u003cstrong data-start=\"332\" data-end=\"347\"\u003enatural gas\u003c\/strong\u003e, delivering efficient and consistent heating.\u003c\/p\u003e\n\u003cp data-start=\"397\" data-end=\"575\"\u003e\u003cstrong data-start=\"397\" data-end=\"454\"\u003eQ: What are the dimensions of this tall water heater?\u003c\/strong\u003e\u003cbr data-start=\"454\" data-end=\"457\"\u003eA: \u003cstrong data-start=\"460\" data-end=\"507\"\u003e40-gallon capacity with an 18-inch diameter\u003c\/strong\u003e, designed for vertical installation in utility spaces or closets.\u003c\/p\u003e\n\u003cp data-start=\"577\" data-end=\"696\"\u003e\u003cstrong data-start=\"577\" data-end=\"611\"\u003eQ: How powerful is the heater?\u003c\/strong\u003e\u003cbr data-start=\"611\" data-end=\"614\"\u003eA: Provides \u003cstrong data-start=\"626\" data-end=\"668\"\u003efast recovery with standard BTU output\u003c\/strong\u003e for consistent hot water.\u003c\/p\u003e\n\u003cp data-start=\"698\" data-end=\"830\"\u003e\u003cstrong data-start=\"698\" data-end=\"737\"\u003eQ: Does it include safety features?\u003c\/strong\u003e\u003cbr data-start=\"737\" data-end=\"740\"\u003eA: Yes. Comes with a \u003cstrong data-start=\"761\" data-end=\"808\"\u003etemperature and pressure (T\u0026amp;P) relief valve\u003c\/strong\u003e for safe operation.\u003c\/p\u003e\n\u003cp data-start=\"832\" data-end=\"941\"\u003e\u003cstrong data-start=\"832\" data-end=\"862\"\u003eQ: Is it energy efficient?\u003c\/strong\u003e\u003cbr data-start=\"862\" data-end=\"865\"\u003eA: Yes. Engineered for \u003cstrong data-start=\"888\" data-end=\"938\"\u003ereliable performance with minimal energy waste\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp data-start=\"943\" data-end=\"1095\"\u003e\u003cstrong data-start=\"943\" data-end=\"991\"\u003eQ: How is the tank protected from corrosion?\u003c\/strong\u003e\u003cbr data-start=\"991\" data-end=\"994\"\u003eA: Equipped with a \u003cstrong data-start=\"1013\" data-end=\"1037\"\u003eprotective anode rod\u003c\/strong\u003e and premium tank materials for long-lasting durability.\u003c\/p\u003e\n\u003cp data-start=\"1097\" data-end=\"1244\"\u003e\u003cstrong data-start=\"1097\" data-end=\"1143\"\u003eQ: What are the installation requirements?\u003c\/strong\u003e\u003cbr data-start=\"1143\" data-end=\"1146\"\u003eA: Requires \u003cstrong data-start=\"1158\" data-end=\"1200\"\u003enatural gas connection, proper venting\u003c\/strong\u003e, and \u003cstrong data-start=\"1206\" data-end=\"1241\"\u003eindoor residential installation\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch5\u003e\n\u003cbr\u003eMaintenance Tips\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli data-section-id=\"jhuik3\" data-start=\"123\" data-end=\"245\"\u003e\n\u003cp data-start=\"125\" data-end=\"245\"\u003e\u003cstrong data-start=\"125\" data-end=\"153\"\u003eFlush the tank annually:\u003c\/strong\u003e Drain and flush \u003cstrong data-start=\"170\" data-end=\"191\"\u003eevery 6–12 months\u003c\/strong\u003e to remove sediment and maintain heating efficiency.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"loqtp5\" data-start=\"246\" data-end=\"373\"\u003e\n\u003cp data-start=\"248\" data-end=\"373\"\u003e\u003cstrong data-start=\"248\" data-end=\"274\"\u003eInspect the anode rod:\u003c\/strong\u003e Check the \u003cstrong data-start=\"285\" data-end=\"317\"\u003esacrificial anode rod yearly\u003c\/strong\u003e and replace if heavily corroded to prevent tank rust.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1bkmhb\" data-start=\"374\" data-end=\"503\"\u003e\n\u003cp data-start=\"376\" data-end=\"503\"\u003e\u003cstrong data-start=\"376\" data-end=\"411\"\u003eCheck gas and vent connections:\u003c\/strong\u003e Ensure \u003cstrong data-start=\"419\" data-end=\"455\"\u003egas lines, fittings, and venting\u003c\/strong\u003e are secure, unobstructed, and corrosion-free.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1aabyvv\" data-start=\"504\" data-end=\"635\"\u003e\n\u003cp data-start=\"506\" data-end=\"635\"\u003e\u003cstrong data-start=\"506\" data-end=\"536\"\u003eTest the T\u0026amp;P relief valve:\u003c\/strong\u003e Operate the \u003cstrong data-start=\"549\" data-end=\"595\"\u003etemperature \u0026amp; pressure relief valve yearly\u003c\/strong\u003e to ensure proper function and safety.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"85uh5u\" data-start=\"636\" data-end=\"762\"\u003e\n\u003cp data-start=\"638\" data-end=\"762\"\u003e\u003cstrong data-start=\"638\" data-end=\"667\"\u003eMonitor burner operation:\u003c\/strong\u003e Watch for \u003cstrong data-start=\"678\" data-end=\"717\"\u003eirregular ignition or flame changes\u003c\/strong\u003e, which may indicate venting or gas issues.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"15k4rne\" data-start=\"763\" data-end=\"879\"\u003e\n\u003cp data-start=\"765\" data-end=\"879\"\u003e\u003cstrong data-start=\"765\" data-end=\"787\"\u003eInspect for leaks:\u003c\/strong\u003e Regularly check \u003cstrong data-start=\"804\" data-end=\"850\"\u003ewater connections, fittings, and tank base\u003c\/strong\u003e for moisture or corrosion.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"uf2ffu\" data-start=\"880\" data-end=\"1025\"\u003e\n\u003cp data-start=\"882\" data-end=\"1025\"\u003e\u003cstrong data-start=\"882\" data-end=\"920\"\u003eMaintain proper airflow and space:\u003c\/strong\u003e Keep the surrounding area \u003cstrong data-start=\"947\" data-end=\"982\"\u003eclean, dry, and well-ventilated\u003c\/strong\u003e for safe operation and easy maintenance.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"A.O. Smith","offers":[{"title":"Default Title","offer_id":47830323429588,"sku":"Item # 12231959 | Model # GCB-40 SIDE T\u0026P VALVE","price":669.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0573\/5481\/3634\/files\/image_8d2d79ef-72df-4b78-a5aa-77c6b510c507.jpg?v=1776876085","url":"https:\/\/buildyourultimatehangout.com\/products\/a-o-smith-40-gallon-tall-natural-gas-water-heater-18-diameter","provider":"Build Your Ultimate Hangout","version":"1.0","type":"link"}