{"product_id":"caleffi-robocal-automatic-float-air-vent-15mm-compression-502649","title":"Caleffi Robocal Automatic Float Air Vent 15mm Compression 502649","description":"\u003cdiv style=\"font-size: 16px; max-width: 900px; font-family: Arial,Helvetica,sans-serif; color: #222; line-height: 1.6;\"\u003e\n\u003cp\u003eThe \u003cstrong\u003eCaleffi ROBOCAL Automatic Float Air Vent with 15mm Compression Connection (MPN 502649)\u003c\/strong\u003e is the UK compression-fit version of Caleffi's \u003cstrong\u003eSeries 5026 Robocal automatic air vent\u003c\/strong\u003e — a compact float-type vent with \u003cstrong\u003evertical discharge\u003c\/strong\u003e, adapted for direct in-line installation in a 15mm pipework circuit without adapters. The \u003cstrong\u003epolypropylene float, silicone rubber obturator\u003c\/strong\u003e, and \u003cstrong\u003estainless steel spring\u003c\/strong\u003e continuously remove dissolved and free air from heating and cooling circuits. Rated to \u003cstrong\u003e10 bar \/ 115°C\u003c\/strong\u003e with a maximum discharge pressure of \u003cstrong\u003e6 bar\u003c\/strong\u003e, it carries \u003cstrong\u003eWRAS approval\u003c\/strong\u003e and is compatible with water\/glycol solutions up to 30%.\u003c\/p\u003e\n\u003cdiv style=\"background: #008377CF; border-radius: 6px; padding: 18px 12px; display: flex; flex-wrap: wrap; justify-content: space-around; margin: 18px 0;\"\u003e\n\u003cdiv style=\"text-align: center; padding: 0 16px;\"\u003e\n\u003cdiv style=\"font-size: 22px; font-weight: bold; color: #fff;\"\u003e10 bar\u003c\/div\u003e\n\u003cdiv style=\"font-size: 12px; color: #ddf4f2; text-transform: uppercase; letter-spacing: .5px;\"\u003eMax Pressure\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align: center; padding: 0 16px;\"\u003e\n\u003cdiv style=\"font-size: 22px; font-weight: bold; color: #fff;\"\u003e115°C\u003c\/div\u003e\n\u003cdiv style=\"font-size: 12px; color: #ddf4f2; text-transform: uppercase; letter-spacing: .5px;\"\u003eMax Temp\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align: center; padding: 0 16px;\"\u003e\n\u003cdiv style=\"font-size: 22px; font-weight: bold; color: #fff;\"\u003e15mm\u003c\/div\u003e\n\u003cdiv style=\"font-size: 12px; color: #ddf4f2; text-transform: uppercase; letter-spacing: .5px;\"\u003eCompression\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align: center; padding: 0 16px;\"\u003e\n\u003cdiv style=\"font-size: 22px; font-weight: bold; color: #fff;\"\u003eWRAS\u003c\/div\u003e\n\u003cdiv style=\"font-size: 12px; color: #ddf4f2; text-transform: uppercase; letter-spacing: .5px;\"\u003eApproved\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align: center; padding: 0 16px;\"\u003e\n\u003cdiv style=\"font-size: 22px; font-weight: bold; color: #fff;\"\u003e6 bar\u003c\/div\u003e\n\u003cdiv style=\"font-size: 12px; color: #ddf4f2; text-transform: uppercase; letter-spacing: .5px;\"\u003eMax Discharge\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border-left: 4px solid #008377; background: #f0faf9; border-top: 1px solid #b2e0db; border-right: 1px solid #b2e0db; border-bottom: 1px solid #b2e0db; border-radius: 0 6px 6px 0; padding: 12px 16px; margin: 10px 0;\"\u003e\n\u003cstrong style=\"color: #008377;\"\u003eWRAS Approved\u003c\/strong\u003e\u003cbr\u003eThe Caleffi Robocal Series 5026 holds WRAS (Water Regulations Advisory Scheme) approval — confirming compliance with UK Water Supply (Water Fittings) Regulations 1999 and suitability for use in UK heating and water systems.\u003c\/div\u003e\n\u003cdiv style=\"border-left: 4px solid #b7660a; background: #fffbf0; border-top: 1px solid #ffe6b3; border-right: 1px solid #ffe6b3; border-bottom: 1px solid #ffe6b3; border-radius: 0 6px 6px 0; padding: 12px 16px; margin: 10px 0;\"\u003e\n\u003cstrong style=\"color: #b7660a;\"\u003eInstallation Orientation\u003c\/strong\u003e\u003cbr\u003eThe 502649 must be installed \u003cstrong\u003evertically upright\u003c\/strong\u003e with the discharge cap at the top. The float mechanism relies on gravity and will not operate correctly if tilted or inverted.\u003c\/div\u003e\n\u003cdiv style=\"border-left: 4px solid #008377; background: #f0faf9; border-top: 1px solid #b2e0db; border-right: 1px solid #b2e0db; border-bottom: 1px solid #b2e0db; border-radius: 0 6px 6px 0; padding: 12px 16px; margin: 10px 0;\"\u003e\n\u003cstrong style=\"color: #008377;\"\u003eOutlet Cap Must Be Open\u003c\/strong\u003e\u003cbr\u003eTo allow venting (both automatic and manual), the outlet cap\/plug must be rotated approximately \u003cstrong\u003eone full turn anti-clockwise from fully closed\u003c\/strong\u003e. A fully tightened cap prevents all air discharge.\u003c\/div\u003e\n\u003cdiv style=\"font-size: 18px; font-weight: bold; color: #008377; border-bottom: 2px solid #008377; padding-bottom: 6px; margin: 24px 0 12px 0;\"\u003eKey Features\u003c\/div\u003e\n\u003cdiv style=\"display: flex; flex-wrap: wrap; gap: 14px; margin: 18px 0;\"\u003e\n\u003cdiv style=\"flex: 1 1 260px; min-width: 220px;\"\u003e\n\u003cdiv style=\"border: 1px solid #e0e0e0; border-radius: 8px; padding: 16px; background: #fff;\"\u003e\n\u003cdiv style=\"font-size: 24px; margin-bottom: 8px;\"\u003e🫧\u003c\/div\u003e\n\u003cdiv style=\"font-weight: bold; color: #008377; border-bottom: 2px solid #008377; padding-bottom: 4px; margin-bottom: 8px;\"\u003eContinuous Automatic Venting\u003c\/div\u003e\n\u003cdiv style=\"font-size: 15px; color: #444;\"\u003eWhen air accumulates, the \u003cstrong\u003efloat falls, the obturator opens, and air is discharged\u003c\/strong\u003e through the vertical outlet. As water rises, the float lifts and reseals — fully automatic, no manual adjustment needed during operation.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1 1 260px; min-width: 220px;\"\u003e\n\u003cdiv style=\"border: 1px solid #e0e0e0; border-radius: 8px; padding: 16px; background: #fff;\"\u003e\n\u003cdiv style=\"font-size: 24px; margin-bottom: 8px;\"\u003e🛡\u003c\/div\u003e\n\u003cdiv style=\"font-weight: bold; color: #008377; border-bottom: 2px solid #008377; padding-bottom: 4px; margin-bottom: 8px;\"\u003eDry Obturator Design\u003c\/div\u003e\n\u003cdiv style=\"font-size: 15px; color: #444;\"\u003eThe float and internal layout are engineered so the \u003cstrong\u003esilicone rubber obturator seal never contacts system water\u003c\/strong\u003e during normal operation — preventing debris and magnetite contamination of the sealing face, the primary cause of auto-vent failure.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1 1 260px; min-width: 220px;\"\u003e\n\u003cdiv style=\"border: 1px solid #e0e0e0; border-radius: 8px; padding: 16px; background: #fff;\"\u003e\n\u003cdiv style=\"font-size: 24px; margin-bottom: 8px;\"\u003e📏\u003c\/div\u003e\n\u003cdiv style=\"font-weight: bold; color: #008377; border-bottom: 2px solid #008377; padding-bottom: 4px; margin-bottom: 8px;\"\u003e15mm Compression Fitting\u003c\/div\u003e\n\u003cdiv style=\"font-size: 15px; color: #444;\"\u003eThe base incorporates a direct 15mm compression connection — install in-line in a 15mm pipe run at any high point. No reducing socket or threaded adapter needed.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1 1 260px; min-width: 220px;\"\u003e\n\u003cdiv style=\"border: 1px solid #e0e0e0; border-radius: 8px; padding: 16px; background: #fff;\"\u003e\n\u003cdiv style=\"font-size: 24px; margin-bottom: 8px;\"\u003e🔄\u003c\/div\u003e\n\u003cdiv style=\"font-weight: bold; color: #008377; border-bottom: 2px solid #008377; padding-bottom: 4px; margin-bottom: 8px;\"\u003eAnti-Vibration Float\u003c\/div\u003e\n\u003cdiv style=\"font-size: 15px; color: #444;\"\u003eThe float carrier includes an \u003cstrong\u003eanti-rotation and anti-vibration system\u003c\/strong\u003e, preventing pump turbulence from causing nuisance opening and reducing wear on the float mechanism over time.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin: 18px 0;\"\u003e\n\u003cdiv style=\"background: #008377CF; color: #fff; font-weight: bold; padding: 10px 14px; border-radius: 6px 6px 0 0;\"\u003eTechnical Specifications\u003c\/div\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; border: 1px solid #d0eeec;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px; width: 50%; font-weight: 600; background: #f4fcfb;\"\u003eMPN\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; background: #f4fcfb;\"\u003e502649\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px; width: 50%; font-weight: 600; background: #fff;\"\u003eSeries\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; background: #fff;\"\u003e5026 — ROBOCAL Automatic Air Vent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px; width: 50%; font-weight: 600; background: #f4fcfb;\"\u003eConnection\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; background: #f4fcfb;\"\u003e15mm compression fitting\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px; width: 50%; font-weight: 600; background: #fff;\"\u003eDischarge Direction\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; background: #fff;\"\u003eVertical (upward)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px; width: 50%; font-weight: 600; background: #f4fcfb;\"\u003eBody \/ Cover Material\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; background: #f4fcfb;\"\u003eBrass EN 12165 CW617N\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px; width: 50%; font-weight: 600; background: #fff;\"\u003eFloat Material\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; background: #fff;\"\u003ePolypropylene (PP)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px; width: 50%; font-weight: 600; background: #f4fcfb;\"\u003eObturator Material\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; background: #f4fcfb;\"\u003eSilicone rubber\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px; width: 50%; font-weight: 600; background: #fff;\"\u003eSpring Material\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; background: #fff;\"\u003eStainless steel 1.4310 \/ AISI 302\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px; width: 50%; font-weight: 600; background: #f4fcfb;\"\u003eSeals\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; background: #f4fcfb;\"\u003eEPDM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px; width: 50%; font-weight: 600; background: #fff;\"\u003eMedium\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; background: #fff;\"\u003eWater; glycol solutions max 30%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px; width: 50%; font-weight: 600; background: #f4fcfb;\"\u003eMax Working Pressure\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; background: #f4fcfb;\"\u003e10 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px; width: 50%; font-weight: 600; background: #fff;\"\u003eMax Discharge Pressure\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; background: #fff;\"\u003e6 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px; width: 50%; font-weight: 600; background: #f4fcfb;\"\u003eMax Working Temperature\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; background: #f4fcfb;\"\u003e115°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px; width: 50%; font-weight: 600; background: #fff;\"\u003eBody Dimensions (approx.)\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; background: #fff;\"\u003eHeight 77mm; Body diameter Ø40mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px; width: 50%; font-weight: 600; background: #f4fcfb;\"\u003eWRAS\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; background: #f4fcfb;\"\u003eApproved\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px; width: 50%; font-weight: 600; background: #fff;\"\u003eManufacturer\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; background: #fff;\"\u003eCaleffi S.p.A., Italy\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"font-size: 18px; font-weight: bold; color: #008377; border-bottom: 2px solid #008377; padding-bottom: 6px; margin: 24px 0 12px 0;\"\u003eFrequently Asked Questions\u003c\/div\u003e\n\u003cdiv style=\"margin: 18px 0;\"\u003e\n\u003cdetails style=\"border: 1px solid #d0eeec; border-radius: 6px; margin-bottom: 8px; overflow: hidden;\"\u003e\n\u003csummary style=\"background: #008377CF; color: #fff; padding: 12px 16px; cursor: pointer; font-weight: 600; list-style: none;\"\u003eWhere is the best position to install the 502649 on a heating system?\u003c\/summary\u003e\n\u003cdiv style=\"padding: 14px 16px; background: #f9fefe; font-size: 15px;\"\u003eInstall at the highest points in the pipework circuit where air naturally collects: immediately above the boiler heat exchanger or heat pump, on buffer vessel headers, at manifold high points, and at any circuit apex. Multiple vents may be needed on complex circuits.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"border: 1px solid #d0eeec; border-radius: 6px; margin-bottom: 8px; overflow: hidden;\"\u003e\n\u003csummary style=\"background: #008377CF; color: #fff; padding: 12px 16px; cursor: pointer; font-weight: 600; list-style: none;\"\u003eDoes this model include a shut-off cock for easy removal?\u003c\/summary\u003e\n\u003cdiv style=\"padding: 14px 16px; background: #f9fefe; font-size: 15px;\"\u003eNo — the 502649 (Series 5026) is the standard version without an integral shut-off cock. To remove the vent body for inspection without draining, either fit a Caleffi Series 561 isolating valve below it, or choose the Series 5027 Robocal (with built-in automatic shut-off cock).\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"border: 1px solid #d0eeec; border-radius: 6px; margin-bottom: 8px; overflow: hidden;\"\u003e\n\u003csummary style=\"background: #008377CF; color: #fff; padding: 12px 16px; cursor: pointer; font-weight: 600; list-style: none;\"\u003eCan this be used on a heat pump or underfloor heating system?\u003c\/summary\u003e\n\u003cdiv style=\"padding: 14px 16px; background: #f9fefe; font-size: 15px;\"\u003eYes — the 115°C and 10 bar ratings give ample headroom for heat pump primary circuits (typically below 65°C) and UFH circuits. Confirm that the system fluid is water or a glycol\/water mix not exceeding 30% glycol concentration.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"border: 1px solid #d0eeec; border-radius: 6px; margin-bottom: 8px; overflow: hidden;\"\u003e\n\u003csummary style=\"background: #008377CF; color: #fff; padding: 12px 16px; cursor: pointer; font-weight: 600; list-style: none;\"\u003eWhy does the vent have a dry obturator?\u003c\/summary\u003e\n\u003cdiv style=\"padding: 14px 16px; background: #f9fefe; font-size: 15px;\"\u003eThe dry obturator design keeps the silicone rubber sealing face away from system water during normal operation. This prevents magnetite sludge, limescale, and inhibitor residue from coating the seal — the leading cause of auto air vent failure in older designs.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"border: 1px solid #d0eeec; border-radius: 6px; margin-bottom: 8px; overflow: hidden;\"\u003e\n\u003csummary style=\"background: #008377CF; color: #fff; padding: 12px 16px; cursor: pointer; font-weight: 600; list-style: none;\"\u003eWhat is the UPC \/ EAN for this product?\u003c\/summary\u003e\n\u003cdiv style=\"padding: 14px 16px; background: #f9fefe; font-size: 15px;\"\u003eEAN \/ UPC: 8016615056228.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Caleffi","offers":[{"title":"Default Title","offer_id":64955049443677,"sku":"502649","price":12.95,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/2051\/3629\/files\/CaleffiAutoairventfloat15mmCompression502649.jpg?v=1781190219","url":"https:\/\/qualityheating.co.uk\/products\/caleffi-robocal-automatic-float-air-vent-15mm-compression-502649","provider":"AIZO Quality Heating","version":"1.0","type":"link"}