{"product_id":"rocket-teflon-dichtung-entlastungsventil-bruehgruppe","title":"Rocket Teflon gasket for the brew group relief valve – C469900783","description":"\u003cdiv class=\"ccc-mobile-wrapper\"\u003e\n\u003cstyle\u003e.ccc-mobile-wrapper{max-width:880px;margin:0 auto;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;color:#1d1d1f;line-height:1.65;font-size:17px}.ccc-mobile-wrapper h2{font-size:1.7em;line-height:1.25;margin:0 0 .6em;font-weight:700}.ccc-mobile-wrapper h3{font-size:1.3em;line-height:1.3;margin:1.8em 0 .5em;font-weight:700}.ccc-mobile-wrapper h4{font-size:1.05em;margin:1.1em 0 .2em}.ccc-mobile-wrapper p{margin:0 0 1em}.ccc-mobile-wrapper a{color:#0b6b5f;text-decoration:underline}.ccc-compare-table{width:100%;border-collapse:collapse;margin:1em 0;font-size:.97em}.ccc-compare-table th,.ccc-compare-table td{text-align:left;padding:10px 12px;border-bottom:1px solid #e3e3e6;vertical-align:top}.ccc-compare-table th{width:42%;font-weight:600;color:#3a3a3c}.ccc-roastery-tip{background:#eff6f4;border-left:4px solid #0b6b5f;border-radius:10px;padding:16px 18px;margin:1.6em 0}.ccc-return-note{background:#fdf3ef;border-left:4px solid #b4532a;border-radius:10px;padding:16px 18px;margin:1.6em 0}.ccc-faq h4{font-weight:700;margin:1.2em 0 .2em}@media(max-width:600px){.ccc-mobile-wrapper{font-size:16px}.ccc-mobile-wrapper h2{font-size:1.45em}.ccc-mobile-wrapper h3{font-size:1.18em}}\u003c\/style\u003e\n\u003ch2\u003eThe Teflon ring that keeps the brew group sealed\u003c\/h2\u003e\n\u003cp\u003eThis flat Teflon washer sits on the relief valve of the Rocket brew group. It seals the point where residual pressure escapes after a shot – a component just a few millimetres in size that still decides whether the pressure stays in the valve or finds another way out.\u003c\/p\u003e\n\u003cp\u003eTeflon is hard and does not spring back. Every time it is screwed down, the ring is pressed a little flatter, and at some point the surface is so deformed that it no longer seals. That is why, when you open the group, you do not put the ring back but replace it. Part number C469900783 identifies it unambiguously – by appearance alone it can hardly be told apart from its siblings.\u003c\/p\u003e\n\u003ch3\u003eWhen it is due\u003c\/h3\u003e\n\u003cp\u003eAfter a shot, water drips from a spot that never dripped before. A damp edge or a film of limescale appears on the valve and comes back after wiping. The group releases pressure hesitantly, and the portafilter only comes loose after a moment. Or, when you take things apart, the ring lies in front of you as a squashed, bowl-shaped washer instead of a flat one – then it has done its job.\u003c\/p\u003e\n\u003ch3\u003eAt a glance\u003c\/h3\u003e\n\u003ctable class=\"ccc-compare-table\"\u003e\n\u003ctr\u003e\n\u003cth\u003eType\u003c\/th\u003e\n\u003ctd\u003eTeflon gasket\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLocation\u003c\/th\u003e\n\u003ctd\u003eBrew group relief valve\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFits\u003c\/th\u003e\n\u003ctd\u003eRocket machines with this brew group – the documentation does not list specific models\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eScope of delivery\u003c\/th\u003e\n\u003ctd\u003eone gasket\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePart number\u003c\/th\u003e\n\u003ctd\u003eC469900783\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eVersion\u003c\/th\u003e\n\u003ctd\u003eTeflon (PTFE); dimensions and thickness are not documented\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eInstallation\u003c\/th\u003e\n\u003ctd\u003eInstallation by a specialist recommended\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eRocket\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003eImportant for installation\u003c\/h3\u003e\n\u003cp\u003eThe part sits in a pressurised line, right next to the hot water of the group. Unplug the machine first and let it depressurise and cool down. Teflon does not tolerate tightening by feel: if it is tightened too much, the material flows and the gasket fails on the first shot. We deliberately do not give step-by-step instructions here – the group is under pressure, and anyone who opens it should have done so before.\u003c\/p\u003e\n\u003ch3\u003eWho it is for\u003c\/h3\u003e\n\u003cp\u003eFor workshops and for experienced owners who renew all sealing surfaces anyway when servicing the brew group. If you are just chasing a drip and do not know where it comes from, write to us first – the group has several spots where water can escape, and the wrong ring will not solve the problem.\u003c\/p\u003e\n\u003ch3\u003eWhat goes with it\u003c\/h3\u003e\n\u003cp\u003eThe same service usually calls for: the \u003ca href=\"\/en\/products\/rocket-teflon-o-ring-36mm-bruehgruppe\"\u003eTeflon O-ring 36 mm for the group\u003c\/a\u003e, the \u003ca href=\"\/en\/products\/rocket-teflon-dichtung-pilzkopfschraube-bruehgruppe\"\u003eTeflon gasket for the mushroom-head screw\u003c\/a\u003e, the \u003ca href=\"\/en\/products\/rocket-gruppenventil-oben-c219900424\"\u003eupper group valve\u003c\/a\u003e and the \u003ca href=\"\/en\/products\/rocket-feinfilter-bruehgruppe-r619905546\"\u003efine filter of the brew group\u003c\/a\u003e. All Rocket parts are listed in \u003ca href=\"\/en\/collections\/zubehor-und-ersatzteile-rocket\"\u003eRocket accessories and spare parts\u003c\/a\u003e and in \u003ca href=\"\/en\/collections\/serviceteile\"\u003eOriginal spare parts\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3\u003eThe Teflon gaskets in the Rocket catalogue\u003c\/h3\u003e\n\u003cp\u003eWe stock five Teflon gaskets individually. They look alike but sit in quite different places – the part number decides, not the shape:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/en\/products\/rocket-teflon-dichtung-entlastungsventil-bruehgruppe\"\u003eBrew group relief valve, C469900783\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/en\/products\/rocket-teflon-dichtung-pilzkopfschraube-bruehgruppe\"\u003eBrew group mushroom-head screw, C469900420\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/en\/products\/rocket-teflon-o-ring-36mm-bruehgruppe\"\u003eTeflon O-ring 36 mm for the brew group, C469900421\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/en\/products\/rocket-teflon-dichtung-dampf-wasser-appartamento-tca\"\u003eSteam and water, Appartamento TCA, A469909447\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/en\/products\/rocket-teflon-ring-sicherheitsventil-dampf-wasserhahn\"\u003eSafety valve and steam\/water tap, A449904331\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"ccc-roastery-tip\"\u003e\n\u003cp\u003e\u003cstrong\u003eFrom our workshop in Bern and Zürich\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWhen we take things apart, we lay the old Teflon rings side by side on a white sheet of paper and write the number next to each one. After half an hour on the workbench they all look the same, and reaching into the wrong box costs more time than writing it down. This is our routine, not a manufacturer requirement. We pull the first shot afterwards with a bean that reveals faults instead of hiding them – for example our \u003ca href=\"\/en\/products\/nutty-delight-kaffee-blend-brasilien-indien\"\u003eNutty Delight\u003c\/a\u003e or the \u003ca href=\"\/en\/products\/cozy-chocolate-natural-brasilien-kaffeebohnen\"\u003eCozy Chocolate\u003c\/a\u003e. If you like it stronger, take the \u003ca href=\"\/en\/products\/very-nutty-kraftiger-robusta-aus-indien\"\u003eVery Nutty\u003c\/a\u003e; the full range is in \u003ca href=\"\/en\/collections\/kaffeebohnen\"\u003eCoffee beans\u003c\/a\u003e.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ccc-return-note\"\u003e\n\u003cp\u003e\u003cstrong\u003eReturns excluded\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOriginal spare parts are excluded from exchange and return. They are sourced specifically for each order and cannot be resold once they have been installed or test-fitted on a machine. So before ordering, check the model, year of manufacture and serial number of your machine – or drop us a line and we will clarify the fit together. Your rights regarding defective goods remain unaffected.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ccc-faq\"\u003e\n\u003ch3\u003eFrequently asked questions\u003c\/h3\u003e\n\u003ch4\u003e\u003cstrong\u003eIs this an electrical part?\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eNo. It is purely a Teflon gasket, with no coil, no connection and no electrical function whatsoever.\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eWhat are the dimensions of the ring?\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eInner diameter, outer diameter and thickness are not documented for C469900783. Send us the serial number of your machine and we will check the fit.\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eHow does it differ from C469900420 and C469900421?\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eAll three are Teflon gaskets on the same brew group, but in three different places. What counts is the part number, not the appearance. The list above shows all five Teflon gaskets in the catalogue.\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eCan I reuse the old ring?\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eWe advise against it. Teflon does not spring back; a ring that has been compressed once rarely seals as well as before after being refitted.\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eCan I see the part in your showroom?\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eYes. You will find us in Bern at Gerberngasse 44 and in Zürich at Hagenholzstrasse 50b. Let us know shortly beforehand and we will have the part ready.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp\u003eQuestions about the fit? Write to us at \u003ca href=\"mailto:office@coffeecoachingclub.ch\"\u003eoffice@coffeecoachingclub.ch\u003c\/a\u003e. We deliver across Switzerland and to Liechtenstein in 2-4 working days.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Is this an electrical part?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No. It is purely a Teflon gasket, with no coil, no connection and no electrical function.\"}},{\"@type\":\"Question\",\"name\":\"What are the dimensions of the ring?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Inner diameter, outer diameter and thickness are not documented for C469900783. Send us the serial number of your machine and we will check the fit.\"}},{\"@type\":\"Question\",\"name\":\"How does it differ from C469900420 and C469900421?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"All three are Teflon gaskets on the same brew group, but in three different places. What counts is the part number, not the appearance.\"}},{\"@type\":\"Question\",\"name\":\"Can I reuse the old ring?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"We advise against it. Teflon does not spring back; a ring that has been compressed once rarely seals as well as before after being refitted.\"}},{\"@type\":\"Question\",\"name\":\"Can I see the part in your showroom?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. You will find us in Bern at Gerberngasse 44 and in Zürich at Hagenholzstrasse 50b. Let us know shortly beforehand and we will have the part ready.\"}}]}\u003c\/script\u003e\n\u003c\/div\u003e","brand":"Rocket","offers":[{"title":"Default Title","offer_id":56310396223873,"sku":"A02239","price":2.2,"currency_code":"CHF","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0633\/2265\/2931\/files\/A02239_1.jpg?v=1790154200","url":"https:\/\/coffeecoachingclub.ch\/en\/products\/rocket-teflon-dichtung-entlastungsventil-bruehgruppe","provider":"Coffee Coaching Club GmbH","version":"1.0","type":"link"}