{"product_id":"polypipe-stainless-steel-ufh-isolation-valves-1-pair-manifold-supply-isolation-ufh165","title":"Polypipe Stainless Steel UFH Isolation Valves 1\" — Pair | Manifold Supply Isolation | UFH165","description":"\u003cstyle\u003e\n  .pp-desc * { box-sizing: border-box; }\n  .pp-desc { font-family: inherit; color: inherit; line-height: 1.7; font-size: 16px; }\n  .pp-desc p, .pp-desc li, .pp-desc td, .pp-desc th { font-size: 16px !important; line-height: 1.7; }\n  .pp-desc h2 { font-size: 22px !important; font-weight: 700; color: #1a2a1a; border-bottom: 2px solid #e05c00; padding-bottom: 6px; margin: 2rem 0 1rem; line-height: 1.3; }\n  .pp-desc h3 { font-size: 17px !important; font-weight: 700; color: #1a2a1a; margin: 1.2rem 0 0.4rem; line-height: 1.4; }\n  .pp-desc p { margin: 0 0 1rem; }\n  .pp-desc ul { padding-left: 1.5rem; margin: 0 0 1rem; }\n  .pp-desc ul li { margin-bottom: 0.5rem; }\n  .pp-intro-box { background: #f9f4f0; border-left: 4px solid #e05c00; padding: 1.1rem 1.4rem; border-radius: 0 6px 6px 0; margin-bottom: 1.5rem; }\n  .pp-intro-box p { margin: 0 !important; }\n  .pp-badge { display: inline-block; background: #e05c00; color: #fff; font-size: 13px !important; font-weight: 700; border-radius: 4px; padding: 2px 10px; margin-right: 6px; margin-bottom: 4px; vertical-align: middle; }\n  .pp-badge.grey { background: #555; }\n  .pp-badge.dark { background: #1a2a1a; }\n  .pp-spec-table { width: 100%; border-collapse: collapse; margin-bottom: 1.2rem; }\n  .pp-spec-table th { background: #1a2a1a; color: #fff !important; text-align: left; padding: 0.7rem 1rem; font-weight: 600; font-size: 16px !important; }\n  .pp-spec-table td { padding: 0.6rem 1rem; border-bottom: 1px solid #e0e0e0; vertical-align: top; font-size: 16px !important; }\n  .pp-spec-table tr:nth-child(even) td { background: #f5f5f5; }\n  .pp-spec-table td:first-child { font-weight: 600; color: #111; width: 42%; }\n  .pp-callout { background: #f9f4f0; border-left: 4px solid #e05c00; border-radius: 0 6px 6px 0; padding: 1rem 1.3rem; margin: 1.2rem 0; }\n  .pp-callout p { margin: 0 !important; }\n  .pp-callout h3 { margin-top: 0 !important; color: #1a2a1a; }\n  .pp-diagram { background: #f0f0f0; border: 1px solid #ccc; border-radius: 6px; padding: 1rem 1.2rem; font-family: monospace; font-size: 14px !important; line-height: 1.8; margin: 1rem 0; color: #333; }\n  .pp-infobox { background: #fff8e6; border: 1px solid #f0d080; border-radius: 6px; padding: 1rem 1.2rem; margin-top: 1.5rem; color: #5a4a00; line-height: 1.6; font-size: 16px !important; }\n  .pp-faq-item { border-bottom: 1px solid #e0e0e0; padding: 1rem 0; }\n  .pp-faq-item:last-child { border-bottom: none; }\n  .pp-faq-item p { margin: 0.4rem 0 0 !important; }\n\u003c\/style\u003e\n\n\u003cdiv class=\"pp-desc\"\u003e\n\n  \u003cdiv class=\"pp-intro-box\"\u003e\n    \u003cp\u003e\n      \u003cspan class=\"pp-badge\"\u003eUFH165\u003c\/span\u003e\n      \u003cspan class=\"pp-badge grey\"\u003ePair (Flow \u0026amp; Return)\u003c\/span\u003e\n      \u003cspan class=\"pp-badge dark\"\u003e1\" BSP — Stainless Steel\u003c\/span\u003e\n    \u003c\/p\u003e\n    \u003cp style=\"margin-top:0.75rem !important;\"\u003eThe \u003cstrong\u003ePolypipe UFH165 Stainless Steel Isolation Valves\u003c\/strong\u003e are supplied as a pair — one valve for the flow connection and one for the return — and are used to connect the Polypipe stainless steel manifold assembly to the UFHSPP1 manifold control pack (pump and mixing valve unit) and to the boiler supply pipework via UFH170 adaptors. The isolation valves allow the manifold and control pack to be isolated from the system pipework for servicing, without the need to drain the entire underfloor heating system. Stainless steel construction matches the Polypipe stainless steel manifold range and provides long-term corrosion resistance in heating system environments. The UFH165 valves are sold separately from the manifold and the UFHSPP1 control pack and must be specified alongside both.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003ch2\u003eRole in the Manifold Assembly\u003c\/h2\u003e\n  \u003cp\u003eThe isolation valves sit between the stainless steel manifold body and the UFHSPP1 control pack. Their position in the assembly means that, when both UFH165 valves are closed, the manifold circuits and control pack can be fully isolated from the boiler pipework — allowing the pump, mixing valve, or manifold components to be removed, serviced, or replaced without shutting down the boiler or draining the wider heating system.\u003c\/p\u003e\n\n  \u003cdiv class=\"pp-diagram\"\u003e\nBoiler 22mm pipework\n        ↕  ← UFH170 adaptor (22mm compression × 1\" BSP)\nUFH165 Isolation Valve — FLOW  ← THIS PRODUCT (1 of the pair)\n        ↕\nUFHSPP1 Control Pack (mixing valve + pump)\n        ↕\nStainless steel manifold FLOW bar\n\n[mirrored on the return side]\n\nStainless steel manifold RETURN bar\n        ↕\nUFHSPP1 Control Pack return connection\n        ↕\nUFH165 Isolation Valve — RETURN  ← THIS PRODUCT (2nd of the pair)\n        ↕\nBoiler return 22mm pipework via UFH170 adaptor\n  \u003c\/div\u003e\n\n  \u003ch2\u003eKey Features\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eStainless steel construction\u003c\/strong\u003e — matches the Polypipe stainless steel manifold range in both material and appearance; long-lasting corrosion resistance in closed heating system water\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003e1\" BSP connections\u003c\/strong\u003e — standard 1\" BSP thread compatible with the Polypipe stainless steel manifold end connections and the UFHSPP1 control pack inlet\/outlet connections; UFH170 adaptors (sold separately) transition to 22mm compression for boiler pipework\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSupplied as a pair\u003c\/strong\u003e — one pack contains both flow and return valves, providing complete supply-end isolation of the manifold assembly in a single order\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBall valve mechanism\u003c\/strong\u003e — quarter-turn isolation for fast, positive shut-off; provides clear open\/closed indication for safe system isolation during maintenance\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSystem isolation without full drain-down\u003c\/strong\u003e — closing both UFH165 valves isolates the control pack and manifold from the boiler circuit, enabling work on the control pack or manifold without emptying the heating system\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eRequired for all stainless steel manifold installations\u003c\/strong\u003e — isolation valves are supplied separately from the manifold and must be ordered alongside the manifold and UFHSPP1 control pack to complete a functional assembly\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n  \u003ctable class=\"pp-spec-table\"\u003e\n    \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMPN\u003c\/td\u003e\n\u003ctd\u003eUFH165\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003ePolypipe\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eStainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eConnection size\u003c\/td\u003e\n\u003ctd\u003e1\" BSP (both ends)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003ePack quantity\u003c\/td\u003e\n\u003ctd\u003ePair (2 valves — flow + return)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMechanism\u003c\/td\u003e\n\u003ctd\u003eBall valve — quarter-turn isolation\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eConnected to manifold side\u003c\/td\u003e\n\u003ctd\u003eUFHSPP1 control pack (pump + mixing valve)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eConnected to boiler side\u003c\/td\u003e\n\u003ctd\u003eUFH170 adaptor (1\"F swivel × 22mm compression, sold separately)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eCompatible manifold range\u003c\/td\u003e\n\u003ctd\u003ePolypipe stainless steel manifolds — PB127xx and UFH127xxEC series\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\n  \u003cdiv class=\"pp-callout\"\u003e\n    \u003ch3\u003e⚠️ Sold Separately — Must Be Specified\u003c\/h3\u003e\n    \u003cp\u003eThe UFH165 isolation valves are \u003cstrong\u003enot included\u003c\/strong\u003e with the stainless steel manifold or the UFHSPP1 control pack. They must be ordered as a separate line item. A complete stainless steel manifold connection assembly requires: stainless steel manifold (PB127xx or UFH127xxEC) + \u003cstrong\u003eUFH165\u003c\/strong\u003e isolation valves + UFHSPP1 control pack + UFH170 adaptors. Missing any one of these four components will leave the assembly incomplete.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n  \u003cdiv class=\"pp-faq-item\"\u003e\n    \u003ch3\u003eWhat is the difference between UFH165 and UFH164?\u003c\/h3\u003e\n    \u003cp\u003eBoth are isolation valve pairs for Polypipe stainless steel manifold assemblies. The UFH164 is an earlier product code — the UFH165 is the current standard isolation valve pair for the stainless steel manifold range. If in doubt about compatibility with your manifold, consult the Polypipe product documentation or contact Polypipe technical support. In most current installations, UFH165 is the correct specification.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"pp-faq-item\"\u003e\n    \u003ch3\u003eCan I use these valves with a plastic Polypipe manifold?\u003c\/h3\u003e\n    \u003cp\u003eNo. The UFH165 stainless steel isolation valves are sized and threaded for the 1\" BSP connections on the Polypipe stainless steel manifold range. The Polypipe plastic manifold range uses different connection sizes and fittings — use the appropriate ancillaries specified for the plastic manifold system.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"pp-infobox\"\u003e\n    \u003cstrong\u003eℹ️ Complete the manifold assembly:\u003c\/strong\u003e UFH165 is ordered alongside the \u003cstrong\u003estainless steel manifold\u003c\/strong\u003e (PB12752–PB12761 or UFH12752EC–UFH12761EC), \u003cstrong\u003eUFHSPP1\u003c\/strong\u003e control pack, and \u003cstrong\u003eUFH170\u003c\/strong\u003e manifold adaptors (1\" × 22mm compression pair). All four components are required for a complete, serviceable stainless steel manifold installation.\n  \u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Polypipe","offers":[{"title":"Default Title","offer_id":63633872290141,"sku":"UFH165","price":49.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/2051\/3629\/files\/ufh165Stainlesssteelisolationvalves1pair.jpg?v=1772129672","url":"https:\/\/qualityheating.co.uk\/products\/polypipe-stainless-steel-ufh-isolation-valves-1-pair-manifold-supply-isolation-ufh165","provider":"AIZO Quality Heating","version":"1.0","type":"link"}