{"title":"Backflow Preventers","description":null,"products":[{"product_id":"b911t-m3","title":"Watts B911T-M3 1\/2\" Threaded Union Solder x NPT Non-Potable Combination Fill Valve \u0026 Backflow Preventer","description":"\u003cp\u003eSeries 911 combination fill valve and backflow preventer consists of a model 9D backflow preventer and model 1156F feed water pressure regulator in one pre-assembled unit. This valve is designed for use on boiler feed lines to provide make up water to the boiler and prevent backflow when supply pressure fails below system pressure.\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":43915081809979,"sku":"B911T-M3","price":303.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0578\/3155\/5131\/files\/ukcuy3tgfsybbf0abqan.jpg?v=1785932421"},{"product_id":"88004111","title":"Watts 88004111 3\/4\" Lead Free Bronze RPZ (LF009M3QTFS)","description":"\u003cp\u003eThis 3\/4 inch lead free reduced pressure zone backflow preventer assembly is designed to prevent the backflow of polluted water from entering into the potable water supply due to backsiphonage and or backpressure in accordance with national plumbing codes and water authority requirements. Its compact modular design facilitates easy maintenance with a single access cover for in-line repairs. It is ideal for protection in continuous pressure piping applications and at cross-connections identified as health hazards and for contaminants at the service line entrance. This assembly consists of a lead free bronze body, 3\/4 inch NPT end connections, quarter turn ball valve shutoffs with tee handles, top mounted test cocks, two in-line independent check valves, captured springs, and replaceable check seats with an internal relief valve for reduced space requirements. This backflow assembly contains an integrated flood sensor with SentryPlus™ Alert technology to detect excessive water discharges from the relief valve. When activated through an add-on sensor connection kit, the flood sensor can send an alert to notify the user of potential flooding. Add-on sensor connection kits are available for both BMS and cellular communications.\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":43915085185083,"sku":"88004111","price":598.18,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0578\/3155\/5131\/files\/mvb0yr1mdc4knqqkcrw2.jpg?v=1785932609"},{"product_id":"88004112","title":"Watts 88004112 1\" Lead Free Bronze RPZ (LF009M2QTFS)","description":"\u003cp\u003eThis 1 inch lead free reduced pressure zone backflow preventer assembly is designed to prevent the backflow of polluted water from entering into the potable water supply due to backsiphonage and or backpressure in accordance with national plumbing codes and water authority requirements. Its compact modular design facilitates easy maintenance with a single access cover for in-line repairs. It is ideal for protection in continuous pressure piping applications and at cross-connections identified as health hazards and for contaminants at the service line entrance. This assembly consists of a lead free bronze body, 1 inch NPT end connections, quarter turn ball valve shutoffs with tee handles, top mounted test cocks, two in-line independent check valves, captured springs, and replaceable check seats with an internal relief valve for reduced space requirements. This backflow assembly contains an integrated flood sensor with SentryPlus™ Alert technology to detect excessive water discharges from the relief valve. When activated through an add-on sensor connection kit, the flood sensor can send an alert to notify the user of potential flooding. Add-on sensor connection kits are available for both BMS and cellular communications.\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":43915086364731,"sku":"88004112","price":642.68,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0578\/3155\/5131\/files\/rqlnpigsilgba0uvym17.jpg?v=1785932667"},{"product_id":"88004114","title":"Watts 88004114 1-1\/2\" Lead Free Bronze RPZ (LF009M2QTFS)","description":"\u003cp\u003eThis 1-1\/2 inch lead free reduced pressure zone backflow preventer assembly is designed to prevent the backflow of polluted water from entering into the potable water supply due to backsiphonage and or backpressure in accordance with national plumbing codes and water authority requirements. Its compact modular design facilitates easy maintenance with a single access cover for in-line repairs. It is ideal for protection in continuous pressure piping applications and at cross-connections identified as health hazards and for contaminants at the service line entrance. This assembly consists of a lead free bronze body, 1-1\/2 inch NPT end connections, quarter turn ball valve shutoffs with tee handles, top mounted test cocks, two in-line independent check valves, captured springs, and replaceable check seats with an internal relief valve for reduced space requirements. This backflow assembly contains an integrated flood sensor with SentryPlus™ Alert technology to detect excessive water discharges from the relief valve. When activated through an add-on sensor connection kit, the flood sensor can send an alert to notify the user of potential flooding. Add-on sensor connection kits are available for both BMS and cellular communications.\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":43915093770299,"sku":"88004114","price":1368.3,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0578\/3155\/5131\/files\/zb5hmf0jfbrjsca2qdu1.jpg?v=1785933064"},{"product_id":"88004113","title":"Watts 88004113 1-1\/4\" Lead Free Bronze RPZ (LF009M2QTFS)","description":"\u003cp\u003eThis 1-1\/4 inch lead free reduced pressure zone backflow preventer assembly is designed to prevent the backflow of polluted water from entering into the potable water supply due to backsiphonage and or backpressure in accordance with national plumbing codes and water authority requirements. Its compact modular design facilitates easy maintenance with a single access cover for in-line repairs. It is ideal for protection in continuous pressure piping applications and at cross-connections identified as health hazards and for contaminants at the service line entrance. This assembly consists of a lead free bronze body, 1-1\/4 inch NPT end connections, quarter turn ball valve shutoffs with tee handles, top mounted test cocks, two in-line independent check valves, captured springs, and replaceable check seats with an internal relief valve for reduced space requirements. This backflow assembly contains an integrated flood sensor with SentryPlus™ Alert technology to detect excessive water discharges from the relief valve. When activated through an add-on sensor connection kit, the flood sensor can send an alert to notify the user of potential flooding. Add-on sensor connection kits are available for both BMS and cellular communications.\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":43915094229051,"sku":"88004113","price":1103.91,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0578\/3155\/5131\/files\/rqlnpigsilgba0uvym17_fe010c8b-40f3-4d42-b34a-f5026d226cee.jpg?v=1785933087"},{"product_id":"9dm3","title":"Watts 9DM3 1\/2\" FIP Union Non-Potable Dual Check Valve","description":"\u003cp\u003eSeries 9D is suitable for use on hot or cold water and can be used under continuous pressure. It features a primary check valve utilizing a rubber disc seating against a mating rubber part to ensure tight closing. A secondary check valve utilizes a rubber disc-to-metal seating. In the event of fouling of the downstream check valve, leakage would be vented to atmosphere through the vent port thereby safeguarding the potable water system. Construction is brass body with stainless steel working parts, integral strainer and durable rubber discs. Female union inlet and outlet connections. Sizes 1\/2\" (15 mm) and 3\/4\" (20 mm). Drain is 1\/2\" (15 mm) thread connection.\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":43915094425659,"sku":"9DM3","price":175.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0578\/3155\/5131\/files\/cmda5z9lwixr18onifek.jpg?v=1785933099"},{"product_id":"b911s-m3","title":"Watts B911S-M3 1\/2\" Union Solder x NPT Non-Potable Combination Fill Valve \u0026 Backflow Preventer","description":"\u003cp\u003eSeries 911 combination fill valve and backflow preventer consists of a model 9D backflow preventer and model 1156F feed water pressure regulator in one pre-assembled unit. This valve is designed for use on boiler feed lines to provide make up water to the boiler and prevent backflow when supply pressure fails below system pressure.\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":43915096752187,"sku":"B911S-M3","price":303.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0578\/3155\/5131\/files\/xalq3rtcopucvjamp51a.jpg?v=1785933204"},{"product_id":"88004115","title":"Watts 88004115 2\" Lead Free Bronze RPZ (LF009M2QTFS2)","description":"\u003cp\u003eThis 2 inch lead free reduced pressure zone backflow preventer assembly is designed to prevent the backflow of polluted water from entering into the potable water supply due to backsiphonage and or backpressure in accordance with national plumbing codes and water authority requirements. Its compact modular design facilitates easy maintenance with a single access cover for in-line repairs. It is ideal for protection in continuous pressure piping applications and at cross-connections identified as health hazards and for contaminants at the service line entrance. This assembly consists of a lead free bronze body, 2 inch NPT end connections, quarter turn ball valve shutoffs with tee handles, top mounted test cocks, two in-line independent check valves, captured springs, and replaceable check seats with an internal relief valve for reduced space requirements. This backflow assembly contains an integrated flood sensor with SentryPlus™ Alert technology to detect excessive water discharges from the relief valve. When activated through an add-on sensor connection kit, the flood sensor can send an alert to notify the user of potential flooding. Add-on sensor connection kits are available for both BMS and cellular communications.\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":43915099078715,"sku":"88004115","price":1545.25,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0578\/3155\/5131\/files\/zb5hmf0jfbrjsca2qdu1_57838861-af0b-4b16-9ab8-104ad1da1bb5.jpg?v=1785933321"},{"product_id":"9dm3-s","title":"Watts 9DM3-S 1\/2\" Union End Solder Non-Potable Dual Check Valve","description":"\u003cp\u003eSeries 9D is suitable for use on hot or cold water and can be used under continuous pressure. It features a primary check valve utilizing a rubber disc seating against a mating rubber part to ensure tight closing. A secondary check valve utilizes a rubber disc-to-metal seating. In the event of fouling of the downstream check valve, leakage would be vented to atmosphere through the vent port thereby safeguarding the potable water system. Construction is brass body with stainless steel working parts, integral strainer and durable rubber discs. Female union inlet and outlet connections. Sizes 1\/2\" (15 mm) and 3\/4\" (20 mm). Drain is 1\/2\" (15 mm) thread connection.\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":43915107827771,"sku":"9DM3-S","price":175.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0578\/3155\/5131\/files\/v3wchkbhncpwi6uinbk3.jpg?v=1785933704"},{"product_id":"35603bftt","title":"Apollo Valves 35603BFTT 1\/2\" FIP Union x FIP Non-Potable Backflow Preventer with Feedwater Regulator","description":"\u003cp\u003eThis is a genuine OEM part from Apollo Valves. Manufactured to original specifications for a reliable, exact-fit repair.\u003c\/p\u003e","brand":"Apollo Valves","offers":[{"title":"Default Title","offer_id":43915109630011,"sku":"35603BFTT","price":232.46,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0578\/3155\/5131\/files\/uximn5bmfmpvhpebrzit.jpg?v=1785933789"},{"product_id":"4alf3a44a","title":"Apollo Valves 4ALF3A44A 3\/4\" FNPT Apollo Dual Check Valve","description":"\u003cp\u003eThis corrosion-resistant APOLLO dual check valve helps prevent backflow by either backpressure or back-siphonage from a cross connection between potable water lines and substances that are objectionable, but not health hazards.\u003c\/p\u003e","brand":"Apollo Valves","offers":[{"title":"Default Title","offer_id":43915110219835,"sku":"4ALF3A44A","price":86.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0578\/3155\/5131\/files\/pnekfcy80jj6iqhbltwx.jpg?v=1785933814"},{"product_id":"bp900-u","title":"Resideo BP900\/U 1\/2\" NPT Backflow Preventer with Intermediate Atmospheric Vent","description":"\u003cp\u003eThis is a genuine OEM part from Resideo. Manufactured to original specifications for a reliable, exact-fit repair.\u003c\/p\u003e","brand":"Resideo","offers":[{"title":"Default Title","offer_id":43915116085307,"sku":"BP900\/U","price":78.91,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0578\/3155\/5131\/files\/bdgz9cuatlqqlptuzyhu.jpg?v=1785933994"},{"product_id":"391002","title":"Watts 391002 1\/2\" Cast Iron (Lead Free) Quarter-Turn Ball Valve Reduced Pressure Zone Assembly","description":"\u003cp\u003eThe Watts 1\/2\" Cast Iron (Lead Free) Quarter-Turn Ball Valve Reduced Pressure Zone Assembly (391002) is a backflow preventers product. Prevent the reverse flow of polluted water from entering into the potable water supply due to backsiphonage and or backpressure. Single access cover and modular check construction for ease of maintenance. Top entry - all internals immediately accessible. Manufactured by Watts for residential and commercial plumbing repair and maintenance applications.\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":44056074420283,"sku":"391002","price":636.18,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0578\/3155\/5131\/files\/qnxyu6uhkejjmkpmju6n.jpg?v=1787836999"},{"product_id":"0063232","title":"0063232 Watts 1\" Lead Free Double Check Valve Assembly (LF007M1-QT)","description":"\u003cp\u003eSeries 007 Double Check Valve Assemblies prevent the backflow of contaminated water into the potable water supply. It consists of a bronze (1\/2 to 2 in) or fused epoxy coated cast iron (2 1\/2 to 3 in) body construction that is easy to maintain and service. Series 007 is ideal at referenced cross-connections identified as non-health hazard applications. Check with local inspection authorities for installation requirements. Maximum Working Pressure: 175psi (12.06 bar).\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":44056074518587,"sku":"0063232","price":407.16,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0578\/3155\/5131\/files\/sends4vruwpfzhq5fr0o.jpg?v=1787837001"},{"product_id":"4a4a33am","title":"Apollo Valves 4A4A33AM 1\/2\" FIP CV Backflow Preventor Union-Non Potable","description":"\u003cp\u003eThe Apollo Valves 1\/2\" FIP CV Backflow Preventor Union-Non Potable (4A4A33AM) is a backflow preventers product. All brass\/bronze construction. Corrosion-resistant. 1\/2\" FIP connection. Manufactured by Apollo Valves for residential and commercial plumbing repair and maintenance applications.\u003c\/p\u003e","brand":"Apollo Valves","offers":[{"title":"Default Title","offer_id":44056074551355,"sku":"4A4A33AM","price":98.21,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0578\/3155\/5131\/files\/idguu0ntvuaf3fehcqto.jpg?v=1787837001"},{"product_id":"35603bfst","title":"Apollo Valves 35603BFST 1\/2\" C Union x FIP Non-Potable Backflow Preventer with Feedwater Regulator","description":"\u003cp\u003eThe Apollo Valves 1\/2\" C Union x FIP Non-Potable Backflow Preventer with Feedwater Regulator (35603BFST) is a backflow preventers product. All brass\/bronze construction. Choice of NPT or solder inlet connections. 1\/2\" C union x FIP connection. Manufactured by Apollo Valves for residential and commercial plumbing repair and maintenance applications.\u003c\/p\u003e","brand":"Apollo Valves","offers":[{"title":"Default Title","offer_id":44056074715195,"sku":"35603BFST","price":253.3,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0578\/3155\/5131\/files\/x5nsguirketsolpqzmhw.jpg?v=1787837005"},{"product_id":"4a4h33am","title":"Apollo Valves 4A4H33AM 1\/2\" C Union Non-Potable Check Valve Backflow Preventer","description":"\u003cp\u003eThe Apollo Valves 1\/2\" C Union Non-Potable Check Valve Backflow Preventer (4A4H33AM) is a backflow preventers product. All brass\/bronze construction. Corrosion-resistant. 1\/2\" C union connection. Manufactured by Apollo Valves for residential and commercial plumbing repair and maintenance applications.\u003c\/p\u003e","brand":"Apollo Valves","offers":[{"title":"Default Title","offer_id":44056074813499,"sku":"4A4H33AM","price":66.8,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0578\/3155\/5131\/files\/bimaonrhta4byhqvtwll.jpg?v=1787837008"},{"product_id":"0391012","title":"0391012 Watts 2\" LF909M1-QT Lead Free Bronze RPZ Assembly","description":"\u003cp\u003eWatts LF909 Lead FreeReduced Pressure Zone Assemblies prevent the reverse flow of polluted water from entering into the potable water supply due to backsiphonage and or backpressure. It consists of a bronze body construction, bronze ball valve shutoffs, and bronze test cocks. Watts 909 features a patented \"air-in\/water-out\" design principle for protection during emergency combined backsiphonage and backpressure conditions. It is ideal for health hazard cross-connections or for containment at the service line entrance. Check with local water authorities for installation requirements. Maximum Working Pressure: 175psi (12.06 bar).\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":44056074879035,"sku":"0391012","price":3621.23,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0578\/3155\/5131\/files\/fndptfsfweyeaxmmrgm0.jpg?v=1787837008"},{"product_id":"0391011","title":"0391011 Watts 1-1\/2\" LF909M1-QT Lead Free Bronze RPZ Assembly","description":"\u003cp\u003eWatts LF909 Lead Free Reduced Pressure Zone Assemblies prevent the reverse flow of polluted water from entering into the potable water supply due to backsiphonage and or backpressure. It consists of a bronze body construction, bronze ball valve shutoffs, and bronze test cocks. Watts 909 features a patented \"air-in\/water-out\" design principle for protection during emergency combined backsiphonage and backpressure conditions. It is ideal for health hazard cross-connections or for containment at the service line entrance. Check with local water authorities for installation requirements. Maximum Working Pressure: 175psi (12.06 bar).\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":44056074911803,"sku":"0391011","price":4145.41,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0578\/3155\/5131\/files\/fndptfsfweyeaxmmrgm0_5582ef12-784b-44dc-823c-1544d48a4430.jpg?v=1787837008"},{"product_id":"0391009","title":"0391009 Watts 1\" LF909QT Lead Free Bronze RPZ Assembly","description":"\u003cp\u003eWatts LF909 Lead FreeReduced Pressure Zone Assemblies prevent the reverse flow of polluted water from entering into the potable water supply due to backsiphonage and or backpressure. It consists of a bronze body construction, bronze ball valve shutoffs, and bronze test cocks. Watts 909 features a patented \"air-in\/water-out\" design principle for protection during emergency combined backsiphonage and backpressure conditions. It is ideal for health hazard cross-connections or for containment at the service line entrance. Check with local water authorities for installation requirements. Maximum Working Pressure: 175psi (12.06 bar).\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":44056075075643,"sku":"0391009","price":2417.54,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0578\/3155\/5131\/files\/jvp4rtykf64v394wadyu.jpg?v=1787837013"},{"product_id":"573009a","title":"Caleffi 573009A 1\/2\" SWT Backflow Preventer with Autofill","description":"\u003cp\u003eThis valve fills 50 percent faster than other valves There are no levers to flip or valve to close Pre calibration the autofill features a pressure setting indicator Anti scale materials the central housing containing the moving parts and the internal compensating spindle are made of a low adhesion coefficient plastic Diaphragm seat seal the useful working surface of the diaphragm is particularly large in order to maintain stable pressure in a system at a preset value regardless of inlet pressure variations Removable filter cartridge the cartridge containing the operating mechanisms, protected by a large surface area strainer is removable Fast filling the autofill fast fills the system to set pressure up to 5-1\/2 GPM filling rate then automatically shuts off the water feed\u003c\/p\u003e","brand":"Caleffi","offers":[{"title":"Default Title","offer_id":44056075141179,"sku":"573009A","price":173.04,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0578\/3155\/5131\/files\/u8cys6jprgwe6sdonxxq.jpg?v=1787837015"},{"product_id":"9dm2","title":"Watts 9DM2 3\/4\" FIP Union Non-Potable Dual Check Valve","description":"\u003cp\u003eSeries 9D is suitable for use on hot or cold water and can be used under continuous pressure. It features a primary check valve utilizing a rubber disc seating against a mating rubber part to ensure tight closing. A secondary check valve utilizes a rubber disc-to-metal seating. In the event of fouling of the downstream check valve, leakage would be vented to atmosphere through the vent port thereby safeguarding the potable water system. Construction is brass body with stainless steel working parts, integral strainer and durable rubber discs. Female union inlet and outlet connections. Sizes 1\/2\" (15 mm) and 3\/4\" (20 mm). Drain is 1\/2\" (15 mm) thread connection.\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":44056075206715,"sku":"9DM2","price":177.52,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0578\/3155\/5131\/files\/icnvhbwlakr0sqz5m8im.jpg?v=1787837015"},{"product_id":"b-0969","title":"T\u0026S Brass B-0969 1\/2\" FNPT Atmospheric Vacuum Breaker","description":"\u003cp\u003eThe T\u0026amp;S Brass 1\/2\" FNPT Atmospheric Vacuum Breaker (B-0969) is a backflow preventers product. 1-year limited warranty. Manufactured by T\u0026amp;S Brass for residential and commercial plumbing repair and maintenance applications.\u003c\/p\u003e","brand":"T\u0026S Brass","offers":[{"title":"Default Title","offer_id":44056075239483,"sku":"B-0969","price":76.93,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0578\/3155\/5131\/files\/idlyj1rfedcs2m30ekro.jpg?v=1787837016"},{"product_id":"9dm2-s","title":"Watts 9DM2-S 3\/4\" Union End Solder Non-Potable Dual Check Valve","description":"\u003cp\u003eSeries 9D is suitable for use on hot or cold water and can be used under continuous pressure. It features a primary check valve utilizing a rubber disc seating against a mating rubber part to ensure tight closing. A secondary check valve utilizes a rubber disc-to-metal seating. In the event of fouling of the downstream check valve, leakage would be vented to atmosphere through the vent port thereby safeguarding the potable water system. Construction is brass body with stainless steel working parts, integral strainer and durable rubber discs. Female union inlet and outlet connections. Sizes 1\/2\" (15 mm) and 3\/4\" (20 mm). Drain is 1\/2\" (15 mm) thread connection.\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":44056075403323,"sku":"9DM2-S","price":177.52,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0578\/3155\/5131\/files\/ir5jzxfm6qpwunt9ej5r.jpg?v=1787837020"},{"product_id":"40lf3a33a","title":"Apollo Valves 40LF3A33A 1\/2\" FNPT Dual Check Valve","description":"\u003cp\u003eThis valve shall be manufactured in America. The bronze body shall be configured with \"wye\" style checks for in-field serviceability. The device shall be available with options for three test cocks for in-line testing. The Apollo® model DUCLF40 dual check valves prevents backflow by either backpressure or back-siphonage resulting from a cross-connection between potable water lines and substances that are objectionable, but not health-hazards.\u003c\/p\u003e","brand":"Apollo Valves","offers":[{"title":"Default Title","offer_id":44056075468859,"sku":"40LF3A33A","price":76.71,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0578\/3155\/5131\/files\/txqibwbe1awogaxv3wkt.jpg?v=1787837022"},{"product_id":"0061888","title":"Watts 0061888 3\/4\" Forged Brass Dual Check Valve with Intermediate Atmospheric Vent","description":"\u003cp\u003eSeries 9D is specially made for smaller supply lines and ideally suited for laboratory equipment, processing tanks, sterilizers, dairy equipment and similar applications. It is particularly recommended for boiler feed lines to prevent backflow when supply pressure falls below system pressure. Series 9D is suitable for use on hot or cold water and can be used under continuous pressure. It features a primary check valve utilizing a rubber disc seating against a mating rubber part to ensure tight closing. A secondary check valve utilizes a rubber disc-to-metal seating. In the event of fouling of the downstream check valve, leakage would be vented to atmosphere through the vent port thereby safeguarding the potable water system. Construction is brass body with stainless steel working parts, integral strainer and durable rubber discs. Female union inlet and outlet connections. Sizes 1\/2\" and 3\/4\". Drain is 1\/2\" thread connection.\u003c\/p\u003e","brand":"Watts","offers":[{"title":"Default Title","offer_id":44056075501627,"sku":"0061888","price":154.36,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0578\/3155\/5131\/files\/leovveahk8gqsxw9vzid.jpg?v=1787837022"},{"product_id":"b-0970-fe","title":"T\u0026S Brass B-0970-FE 3\/8\" FNPT Dual Check Vacuum Breaker with Intermediate Vent","description":"\u003cp\u003eThe T\u0026amp;S Brass 3\/8\" FNPT Dual Check Vacuum Breaker with Intermediate Vent (B-0970-FE) is a backflow preventers product. Designed for continuous pressure use. 1-year limited warranty. Design prevents back siphonage and back-flow. Manufactured by T\u0026amp;S Brass for residential and commercial plumbing repair and maintenance applications.\u003c\/p\u003e","brand":"T\u0026S Brass","offers":[{"title":"Default Title","offer_id":44056075567163,"sku":"B-0970-FE","price":120.34,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0578\/3155\/5131\/files\/poqxb3luhohnmzuo92kr.jpg?v=1787837023"},{"product_id":"b-0968","title":"T\u0026S Brass B-0968 3\/8\" FNPT Atmospheric Vacuum Breaker","description":"\u003cp\u003eThe T\u0026amp;S Brass 3\/8\" FNPT Atmospheric Vacuum Breaker (B-0968) is a backflow preventers product. 1-year limited warranty. 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