{"product_id":"bzcovac-pvb-4a-4alf-float-bonnet-complete-repair-kit-1-2-3-4-in-top-half-assembly-with-o-rings-poppet","title":"Bzcovac PVB-4A\/4ALF Float \u0026 Bonnet Complete Repair Kit — 1\/2–3\/4 in Top-Half Assembly with O-rings \u0026 Poppet","description":"\u003cp\u003e\u003cstrong\u003eThe Bzcovac 4A00407 Float and Bonnet Complete Repair Kit restores the top half of Apollo\/Conbraco PVB-4A and PVB-4ALF 1\/2\"–3\/4\" pressure vacuum breakers to factory-like operation.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis kit contains every component needed to rebuild the upper assembly of compatible Apollo\/Conbraco PVB 4A Series backflow preventers: O-ring, poppet assembly, bonnet assembly, bonnet O-ring, float cage and canopy. Designed as a direct-fit service kit, it replaces worn parts that commonly cause leaks, reduced venting performance, or float malfunction so you can return the device to reliable backflow prevention without replacing the entire valve.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this kit bring a PVB back to proper backflow prevention?\u003c\/h3\u003e\n\u003cp\u003eWorn sealing surfaces, degraded seats and a damaged float are frequent reasons a pressure vacuum breaker fails to stop back-siphonage. The 4A00407 replaces those upper-half components with factory-equivalent parts to restore the venting and check functions.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIncludes new poppet and reversible silicone seat disc for effective seating\u003c\/li\u003e\n  \u003cli\u003eFresh O-rings and bonnet seal eliminate top-half leaks\u003c\/li\u003e\n  \u003cli\u003eFloat cage and canopy restore correct float movement and vent timing\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat parts are included and why are they important?\u003c\/h3\u003e\n\u003cp\u003eThe kit supplies the full set of components required to service the top half of the PVB: sealing elements, moving parts and the float mechanism. Each piece is selected to interact correctly with Apollo\/Conbraco 4A Series geometry so service is straightforward and reliable.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePoppet assembly with captured spring—controls check action\u003c\/li\u003e\n  \u003cli\u003eReversible silicone seat disc—extends service life and simplifies replacement\u003c\/li\u003e\n  \u003cli\u003eBonnet assembly plus bonnet O-ring—restores proper compression and sealing\u003c\/li\u003e\n  \u003cli\u003eFloat cage and canopy—ensures correct float travel and vent timing\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this kit handle freezing conditions or corrosion-prone locations?\u003c\/h3\u003e\n\u003cp\u003eThe original PVB design includes a standard integral freeze-relief feature and stainless-steel hardware where needed; this repair kit maintains those protections when correctly installed in the top half of the device. The kit’s materials support reliable operation in seasonal freeze–thaw cycles and resist corrosion at the handle and fasteners.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFreeze-relief design preserved when top-half components are replaced\u003c\/li\u003e\n  \u003cli\u003eStainless steel handles and nuts reduce corrosion risk on shutoffs\u003c\/li\u003e\n  \u003cli\u003eReplaceable parts avoid full valve replacement after intermittent freezing events\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow easy is it to install this top-half repair kit?\u003c\/h3\u003e\n\u003cp\u003eTechnically straightforward for a trained technician, the kit is intended as a direct top-half swap for Apollo\/Conbraco 4A Series 1\/2\" and 3\/4\" models. Basic field tools and adherence to local plumbing codes are required; follow manufacturer torque and reassembly guidance to ensure safe operation.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDirect-fit components minimize machining or modification\u003c\/li\u003e\n  \u003cli\u003eCaptured spring and reversible seat simplify reassembly and alignment\u003c\/li\u003e\n  \u003cli\u003eRecommended for certified technicians or qualified maintenance personnel\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The Bzcovac 4A00407 Float and Bonnet Complete Repair Kit is aimed at plumbing contractors, facility maintenance teams and irrigation specialists servicing Apollo\/Conbraco PVB-4A and PVB-4ALF 1\/2\"–3\/4\" backflow preventers. If you need to restore venting performance, replace failed seals, or maintain freeze-relief capability without replacing the entire valve body, this kit provides the OEM-style parts required to return the top half to reliable operation. It’s an economical choice when the body remains sound but the upper assembly shows wear.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is this kit compatible with all Apollo\/Conbraco PVB 4A models?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: This kit fits Apollo\/Conbraco PVB-4A and PVB-4ALF 1\/2\" and 3\/4\" series top-half assemblies; verify your model match before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does the kit include instructions and warranty?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: The kit includes standard replacement parts and is backed by a 1-year warranty; follow manufacturer installation guidance.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Bzcovac","offers":[{"title":"Default Title","offer_id":56834504229204,"sku":"B0DXQ63Y5X","price":92.07,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1063\/2652\/4244\/files\/bzcovac-front-assembly-top-half.jpg?v=1787050989","url":"https:\/\/gardenluxe.co.uk\/products\/bzcovac-pvb-4a-4alf-float-bonnet-complete-repair-kit-1-2-3-4-in-top-half-assembly-with-o-rings-poppet","provider":"Gardenluxe Uk","version":"1.0","type":"link"}