{"product_id":"gate-type-pump-valve-brass-22mm-28mm-compression-central-heating-circulator-pump-isolation-valve","title":"Gate Type Pump Valve Brass 22mm 28mm Compression — Central Heating Circulator Pump Isolation Valve","description":"\u003cdiv style=\"font-size:16px;font-family:Arial,Helvetica,sans-serif;color:#1a1a1a;max-width:900px;margin:0 auto;line-height:1.6;\"\u003e\n\n  \u003c!-- ── INTRO ─────────────────────────────────────────────────────── --\u003e\n  \u003cp style=\"margin:0 0 18px;\"\u003e\n    The \u003cstrong\u003eGate Type Pump Valve\u003c\/strong\u003e is a \u003cstrong\u003ebrass compression isolation valve specifically designed for connecting and isolating domestic central heating circulating pumps\u003c\/strong\u003e. Available in \u003cstrong\u003e22mm (PV22G)\u003c\/strong\u003e for standard domestic pump connections and \u003cstrong\u003e28mm (PV28G)\u003c\/strong\u003e for larger systems. Each valve combines a compression connection to the copper pipework with a 1½\" BSP female thread that connects directly to the pump union, allowing the pump to be isolated and removed for service or replacement without draining the entire heating system. Constructed from brass with rubber seals, these valves are a standard component of any pump installation or replacement, providing a straightforward way to service or swap out a circulating pump with minimal disruption.\n  \u003c\/p\u003e\n\n  \u003c!-- ── AMBER VARIANT CALLOUT ─────────────────────────────────────── --\u003e\n  \u003cdiv style=\"border-left:4px solid #f59e0b;background:#fff8e1;padding:10px 16px;margin-bottom:22px;border-radius:0 6px 6px 0;\"\u003e\n    \u003cstrong style=\"color:#b45309;\"\u003e⚡ PV22G vs PV28G — Which size?\u003c\/strong\u003e\u003cbr\u003e\n    \u003cstrong\u003ePV22G (22mm):\u003c\/strong\u003e For most domestic CH systems — fits standard 22mm primary pipework. Compatible with all domestic circulating pumps with a 1½\" BSP union connection, including Grundfos, Wilo, and Fernox pump models commonly used in standard boiler installations.\u003cbr\u003e\n    \u003cstrong\u003ePV28G (28mm):\u003c\/strong\u003e For larger domestic and light commercial installations using 28mm primary pipework — heat pump primary circuits, larger boiler systems, or where the primary flow and return are 28mm. Also connects to the standard 1½\" BSP pump union fitting.\n  \u003c\/div\u003e\n\n  \u003c!-- ── FEATURES GRID ──────────────────────────────────────────────── --\u003e\n  \u003cdiv style=\"background:#008377CF;color:#fff;font-weight:600;font-size:15px;padding:10px 16px;border-radius:6px 6px 0 0;\"\u003e\n    Features \u0026amp; Benefits\n  \u003c\/div\u003e\n  \u003cdiv style=\"display:grid;grid-template-columns:repeat(auto-fill,minmax(255px,1fr));gap:12px;background:#e6f4f3;padding:14px;border-radius:0 0 6px 6px;margin-bottom:22px;\"\u003e\n\n    \u003cdiv style=\"background:#f0faf9;border:1px solid #c8e6e3;border-radius:6px;padding:13px;\"\u003e\n      \u003cdiv style=\"font-weight:700;color:#008377CF;margin-bottom:5px;\"\u003e✔ Isolate the Pump Without Draining Down\u003c\/div\u003e\n      \u003cdiv style=\"font-size:14px;\"\u003eFitted on the pump inlet and outlet, a pair of gate pump valves allows the circulating pump to be \u003cstrong\u003eisolated and removed without draining the heating system\u003c\/strong\u003e. Close both valves, remove the pump, service or replace it, refit, and reopen — with no need to drain radiators, refill the system, or re-dose inhibitor. This is the primary purpose of pump valves and the reason every pump installation should include a pair.\u003c\/div\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv style=\"background:#f0faf9;border:1px solid #c8e6e3;border-radius:6px;padding:13px;\"\u003e\n      \u003cdiv style=\"font-weight:700;color:#008377CF;margin-bottom:5px;\"\u003e✔ Direct Pump Connection — 1½\" BSP Female Thread\u003c\/div\u003e\n      \u003cdiv style=\"font-size:14px;\"\u003eThe pump-side of the valve has a \u003cstrong\u003e1½\" BSP female thread\u003c\/strong\u003e — the industry standard for domestic circulating pump unions (Grundfos UPS\/Alpha, Wilo, and equivalent models). This screws directly onto the pump's union tail without additional adaptors. The pipework side is a standard compression fitting onto copper tube.\u003c\/div\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv style=\"background:#f0faf9;border:1px solid #c8e6e3;border-radius:6px;padding:13px;\"\u003e\n      \u003cdiv style=\"font-weight:700;color:#008377CF;margin-bottom:5px;\"\u003e✔ Gate Type — Full Bore When Open\u003c\/div\u003e\n      \u003cdiv style=\"font-size:14px;\"\u003eThe gate valve mechanism provides \u003cstrong\u003efull bore flow when fully open\u003c\/strong\u003e — the wedge gate lifts entirely clear of the flow path, creating no restriction in the open position. This is important for pump isolation valves, where any restriction on the suction or discharge side increases the pump's effective head requirement and reduces flow. A full-bore open position also allows accurate flow measurements and system balancing to be carried out with the valves fully open.\u003c\/div\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv style=\"background:#f0faf9;border:1px solid #c8e6e3;border-radius:6px;padding:13px;\"\u003e\n      \u003cdiv style=\"font-weight:700;color:#008377CF;margin-bottom:5px;\"\u003e✔ Brass Construction — Long Service Life\u003c\/div\u003e\n      \u003cdiv style=\"font-size:14px;\"\u003eValve body, gate, and compression components are \u003cstrong\u003ebrass\u003c\/strong\u003e — the standard material for heating system valves in the UK. Brass resists dezincification in typical domestic heating water conditions and maintains integrity at central heating operating temperatures and pressures without degradation or seal failure over a normal service life of many years.\u003c\/div\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv style=\"background:#f0faf9;border:1px solid #c8e6e3;border-radius:6px;padding:13px;\"\u003e\n      \u003cdiv style=\"font-weight:700;color:#008377CF;margin-bottom:5px;\"\u003e✔ Compression Fittings — No Soldering\u003c\/div\u003e\n      \u003cdiv style=\"font-size:14px;\"\u003e\n\u003cstrong\u003eCompression connections\u003c\/strong\u003e (with olive and nut) on the pipework side mean no blowtorch is required — the valve can be fitted to existing 22mm or 28mm copper tube without heat, making it suitable for retrofit in occupied premises or confined plant rooms where open flame is inadvisable.\u003c\/div\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv style=\"background:#f0faf9;border:1px solid #c8e6e3;border-radius:6px;padding:13px;\"\u003e\n      \u003cdiv style=\"font-weight:700;color:#008377CF;margin-bottom:5px;\"\u003e✔ Universal — Fits All Domestic Circulating Pumps\u003c\/div\u003e\n      \u003cdiv style=\"font-size:14px;\"\u003eThe standard 1½\" BSP union interface is \u003cstrong\u003ecompatible with all domestic central heating circulating pumps\u003c\/strong\u003e — Grundfos, Wilo, DAB, Fernox, and all equivalent makes. Whether fitting a new pump or replacing an existing installation without pump valves, a pair of PV22G or PV28G valves will connect correctly without modification.\u003c\/div\u003e\n    \u003c\/div\u003e\n\n  \u003c\/div\u003e\n\n  \u003c!-- ── SPEC TABLE ─────────────────────────────────────────────────── --\u003e\n  \u003cdiv style=\"background:#008377CF;color:#fff;font-weight:600;font-size:15px;padding:10px 16px;border-radius:6px 6px 0 0;\"\u003e\n    Technical Specifications\n  \u003c\/div\u003e\n  \u003ctable style=\"width:100%;border-collapse:collapse;margin-bottom:8px;font-size:14px;\"\u003e\n    \u003ctbody\u003e\n      \u003ctr style=\"background:#f0faf9;\"\u003e\n\u003ctd style=\"padding:9px 14px;font-weight:600;width:40%;border-bottom:1px solid #c8e6e3;\"\u003ePart Numbers\u003c\/td\u003e\n\u003ctd style=\"padding:9px 14px;border-bottom:1px solid #c8e6e3;\"\u003e\n\u003cstrong\u003ePV22G\u003c\/strong\u003e (22mm) \/ \u003cstrong\u003ePV28G\u003c\/strong\u003e (28mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr style=\"background:#fff;\"\u003e\n\u003ctd style=\"padding:9px 14px;font-weight:600;border-bottom:1px solid #c8e6e3;\"\u003eValve Type\u003c\/td\u003e\n\u003ctd style=\"padding:9px 14px;border-bottom:1px solid #c8e6e3;\"\u003eGate type — full bore when open\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr style=\"background:#f0faf9;\"\u003e\n\u003ctd style=\"padding:9px 14px;font-weight:600;border-bottom:1px solid #c8e6e3;\"\u003ePipework Connection\u003c\/td\u003e\n\u003ctd style=\"padding:9px 14px;border-bottom:1px solid #c8e6e3;\"\u003eCompression — 22mm (PV22G) \/ 28mm (PV28G)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr style=\"background:#fff;\"\u003e\n\u003ctd style=\"padding:9px 14px;font-weight:600;border-bottom:1px solid #c8e6e3;\"\u003ePump Connection\u003c\/td\u003e\n\u003ctd style=\"padding:9px 14px;border-bottom:1px solid #c8e6e3;\"\u003e1½\" BSP female thread (standard pump union)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr style=\"background:#f0faf9;\"\u003e\n\u003ctd style=\"padding:9px 14px;font-weight:600;border-bottom:1px solid #c8e6e3;\"\u003eBody Material\u003c\/td\u003e\n\u003ctd style=\"padding:9px 14px;border-bottom:1px solid #c8e6e3;\"\u003eBrass\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr style=\"background:#fff;\"\u003e\n\u003ctd style=\"padding:9px 14px;font-weight:600;border-bottom:1px solid #c8e6e3;\"\u003eSeals\u003c\/td\u003e\n\u003ctd style=\"padding:9px 14px;border-bottom:1px solid #c8e6e3;\"\u003eRubber\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr style=\"background:#f0faf9;\"\u003e\n\u003ctd style=\"padding:9px 14px;font-weight:600;border-bottom:1px solid #c8e6e3;\"\u003eApplication\u003c\/td\u003e\n\u003ctd style=\"padding:9px 14px;border-bottom:1px solid #c8e6e3;\"\u003eDomestic central heating circulating pump isolation\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr style=\"background:#fff;\"\u003e\n\u003ctd style=\"padding:9px 14px;font-weight:600;border-bottom:1px solid #c8e6e3;\"\u003eCompatible Pumps\u003c\/td\u003e\n\u003ctd style=\"padding:9px 14px;border-bottom:1px solid #c8e6e3;\"\u003eAll domestic circulating pumps with 1½\" BSP union — Grundfos, Wilo, DAB and equivalents\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr style=\"background:#f0faf9;\"\u003e\n\u003ctd style=\"padding:9px 14px;font-weight:600;\"\u003eSold As\u003c\/td\u003e\n\u003ctd style=\"padding:9px 14px;\"\u003eSingles (a pair is required per pump — one inlet, one outlet)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n  \u003cp style=\"font-size:13px;color:#666;margin:6px 0 0;\"\u003eA complete pump installation requires \u003cstrong\u003etwo valves\u003c\/strong\u003e — one on the inlet (suction) and one on the outlet (discharge) side of the pump.\u003c\/p\u003e\n\n\u003c\/div\u003e","brand":"AIZO Quality Heating","offers":[{"title":"22mm Compression","offer_id":64135804125533,"sku":"PV22G","price":7.95,"currency_code":"GBP","in_stock":true},{"title":"28mm Compression","offer_id":64135804158301,"sku":"PV28G","price":9.3,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/2051\/3629\/files\/GateTypePumpValveBrass22mm28mmCompression_CentralHeatingCirculatorPumpIsolationValve.webp?v=1775753479","url":"https:\/\/qualityheating.co.uk\/products\/gate-type-pump-valve-brass-22mm-28mm-compression-central-heating-circulator-pump-isolation-valve","provider":"AIZO Quality Heating","version":"1.0","type":"link"}