{"product_id":"watts-sd3-fn-3-8-lead-free-dual-check-valve","title":"Watts SD3-FN 3\/8 Lead Free Dual Check Valve","description":"Series \u003cb\u003eSD3\u003c\/b\u003e is a dual check with atmospheric port designed for the protection of the water supply from carbon dioxide gas and carbonated water. These substances can flow from post-mix beverage systems and are very acidic. If the acidic water comes in contact with copper tubing or copper pipe, it will cause the leaching of copper salts into the water supply. The dissolved copper if ingested can cause nausea, abdominal pain, and in some cases vomiting. The SD3 prevents the reverse flow of potentially contaminated water into the potable water supply due to back pressure backflow and is used for continuous or intermittent pressure conditions. The SD3 atmospheric vent provides a visual indication of failure in the event that the downstream check fails and system backpressure exceeds the supply pressure.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eTested and certified by NSF\u003c\/strong\u003e. The Watts SD3-FN Dual Check Valve has been tested and certified by NSF to meet NSF\/ANSI standard 61 Annex G. This certification demonstrates that this valve meets the lead-free qualifications.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003cul\u003e\n\u003cli\u003eCertified to ANSI\/NSF Standard 18\u003c\/li\u003e\n\u003cli\u003eASSE 1022 Approved Dual Check with Atmospheric Vent\u003c\/li\u003e\n\u003cli\u003e316 stainless steel body for corrosion resistance\u003c\/li\u003e\n\u003cli\u003eAll rubber compounds comply with FDA food additive regulations\u003c\/li\u003e\n\u003cli\u003eStreamlined body design minimizes pressure loss and cavitation\u003c\/li\u003e\n\u003cli\u003eA wide variety of custom end connections are available\u003c\/li\u003e\n\u003cli\u003eEndurance tested for more than 500,000 pumping cycle\u003c\/li\u003e\n\u003cli\u003eAtmospheric port provides visual indication of failure of the second check\u003c\/li\u003e\n\u003cli\u003eWye pattern strainer model for water supply installations\u003c\/li\u003e\n\u003c\/ul\u003e\u003cstrong\u003eNote:The wetted surface of this product contacted by consumable water contains less than 0.25% of lead by weight.\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003e","brand":"Watts","offers":[{"title":"Single","offer_id":45604075634839,"sku":"SD3-FN 3\/8","price":446.5,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0416\/1440\/9879\/files\/eflxtt1hep3lw9mpt6wq.jpg?v=1780579384","url":"https:\/\/neosupply.com\/products\/watts-sd3-fn-3-8-lead-free-dual-check-valve","provider":"NeoSupply","version":"1.0","type":"link"}