{"product_id":"jobe-topaz-differential-valve","title":"Jobe Topaz Differential Float Valve","description":"\u003ch2 style=\"font-size:1.6em; font-weight:700; line-height:1.25; margin:0 0 0.6em;\"\u003eJobe Topaz Differential Float Valve – Water Tank Float Valve for Pump-Filled Storage Tanks\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eShips directly from the manufacturer.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eJobe Topaz Differential Float Valve\u003c\/strong\u003e is a \u003cstrong\u003ehigh-flow water tank float valve\u003c\/strong\u003e made for \u003cstrong\u003estorage tanks filled by a pressure-system-controlled pump\u003c\/strong\u003e. Instead of opening a little every time the level drops, it holds shut across an \u003cstrong\u003eadjustable level difference from 2\" up to 8.2 ft (50mm–2.5m)\u003c\/strong\u003e — so your pump starts and stops far less often.\u003c\/p\u003e\n\u003cp\u003eHere's how it works: as the tank empties, a \u003cstrong\u003eweighted float\u003c\/strong\u003e travels down its cord until it hits the bottom stop, and the valve \u003cstrong\u003eopens immediately to full flow\u003c\/strong\u003e. The valve stays open while the tank fills and the float rises to the upper stop, which lifts the arm and \u003cstrong\u003eshuts the valve down\u003c\/strong\u003e. You set both the start and stop levels.\u003c\/p\u003e\n\u003cp\u003eThe Differential \u003cstrong\u003emounts at the top of the tank\u003c\/strong\u003e — it fits easily through a thin-walled tank or screws into a threaded tank inlet — and Jobe rates it for \u003cstrong\u003eall makes and models of tanks\u003c\/strong\u003e. It's available in \u003cstrong\u003e1\/2\", 3\/4\", 1\" and 1-1\/4\" inlets\u003c\/strong\u003e, all supplied with a \u003cstrong\u003eDetach long tail\u003c\/strong\u003e, backnut and seal washer.\u003c\/p\u003e\n\u003cp\u003eJobe's patented \u003cstrong\u003eDetach Valve Seal Access System\u003c\/strong\u003e gives quick access to the valve seal, and the valve is built from \u003cstrong\u003eglass-filled nylon\u003c\/strong\u003e with \u003cstrong\u003e304 stainless steel\u003c\/strong\u003e hardware for water storage tanks, cisterns and irrigation systems.\u003c\/p\u003e\n\u003ch3 style=\"font-size:1.3em; font-weight:700; margin:1.2em 0 0.4em;\"\u003eFeatures\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eAdjustable Level Differential\u003c\/strong\u003e\u003cbr\u003eSet start and stop levels anywhere from 2\" to 8.2 ft (50mm–2.5m).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKeeps Pump Operation to a Minimum\u003c\/strong\u003e\u003cbr\u003eFewer pump starts and stops on pressure-switch controlled systems.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOpens to Full Flow\u003c\/strong\u003e\u003cbr\u003eWhen the float reaches the bottom stop, the valve opens immediately to full flow.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTop-of-Tank Mounting\u003c\/strong\u003e\u003cbr\u003eFits through a thin-walled tank or screws into a threaded tank inlet.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDetach Valve Seal Access\u003c\/strong\u003e\u003cbr\u003eJobe's patented Detach system gives quick access to the valve seal.\u003c\/p\u003e\n\u003ch3 style=\"font-size:1.3em; font-weight:700; margin:1.2em 0 0.4em;\"\u003eWhich Size Is Right for You?\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e1\/2\" Long Tail\u003c\/strong\u003e\u003cbr\u003e3-15\/16\" thread length, with backnut and seal washer.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e3\/4\" Long Tail\u003c\/strong\u003e\u003cbr\u003e1-13\/16\" thread length, with backnut and seal washer.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e1\" Long Tail\u003c\/strong\u003e\u003cbr\u003e2-7\/16\" thread length, with backnut and seal washer. More flow than the 3\/4\" at the same pressure.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e1-1\/4\" Long Tail\u003c\/strong\u003e\u003cbr\u003e2-21\/32\" thread length, with backnut and seal washer. The largest inlet, with more flow than the 3\/4\" at the same pressure.\u003c\/p\u003e\n\u003ch3 style=\"font-size:1.3em; font-weight:700; margin:1.2em 0 0.4em;\"\u003eSpecifications\u003c\/h3\u003e\n\u003cp\u003eInlet Sizes: 1\/2\", 3\/4\", 1\", 1-1\/4\" (Detach long tail)\u003cbr\u003e\nLong Tail Thread Length: 1\/2\" – 3-15\/16\" | 3\/4\" – 1-13\/16\" | 1\" – 2-7\/16\" | 1-1\/4\" – 2-21\/32\" (backnut \u0026amp; seal washer included)\u003cbr\u003e\nOperating Pressure: 15–150 psi (1–10 bar)\u003cbr\u003e\nMax Temperature: 140°F (60°C)\u003cbr\u003e\nLevel Differential: Adjustable, 2\" to 8.2 ft (50mm–2.5m)\u003cbr\u003e\nMounting: Top of tank\u003cbr\u003e\nMaterials: Glass-filled nylon body, EPDM diaphragm, TPU seal, HDPE float, 304 stainless steel hardware\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1749\/0017\/files\/TOPAZ-DIFFERENTIAL-INFO-2025.pdf?v=1792011354\" target=\"_blank\" rel=\"noopener\" style=\"color:#0000EE;\"\u003e\u003cstrong\u003e\u003cu\u003eJobe Topaz Differential Spec Sheet (PDF)\u003c\/u\u003e\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3 style=\"font-size:1.3em; font-weight:700; margin:1.2em 0 0.4em;\"\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is a differential float valve?\u003c\/strong\u003e\u003cbr\u003eIt lets the tank drop a set amount before refilling, then fills all the way back up — instead of topping up constantly. That keeps a pressure-switch pump from starting and stopping over and over.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow should I set my pump's pressure switch?\u003c\/strong\u003e\u003cbr\u003eJobe recommends watching the pressure your pump runs at while the tank fills, then setting the pressure switch to turn the pump off at least 1 bar (about 15 psi) above that running pressure.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill it work on a low-pressure gravity system?\u003c\/strong\u003e\u003cbr\u003eThe Differential is rated from 15 psi (1 bar) to 150 psi (10 bar) and is designed for pump-filled tanks. For low-pressure troughs, see the \u003ca href=\"\/products\/jobe-topaz-float-valve\"\u003e\u003cstrong\u003eJobe Topaz Float Valve\u003c\/strong\u003e\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhere does it mount?\u003c\/strong\u003e\u003cbr\u003eAt the top of the tank — through a thin-walled tank or into a threaded tank inlet.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cstrong\u003eFewer pump starts, full refills every cycle — the Jobe Topaz Differential keeps your storage tank and your pump working smarter.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Jobe","offers":[{"title":"1\/2\" Long Tail","offer_id":67620786110519,"sku":"W-VLV-0904","price":294.25,"currency_code":"USD","in_stock":true},{"title":"3\/4\" Long Tail","offer_id":67620786143287,"sku":"W-VLV-0905","price":300.56,"currency_code":"USD","in_stock":true},{"title":"1\" Long Tail","offer_id":67620786176055,"sku":"W-VLV-0906","price":303.09,"currency_code":"USD","in_stock":true},{"title":"1-1\/4\" Long Tail","offer_id":67620786208823,"sku":"W-VLV-0907","price":322.03,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1749\/0017\/files\/Jobe_Topaz_Differential_2000x2000_dafdc21d-617e-43ac-8357-64177dbc6ddf.jpg?v=1792010709","url":"https:\/\/powerflexfence.com\/products\/jobe-topaz-differential-valve","provider":"Powerflex","version":"1.0","type":"link"}