{"product_id":"geberit-type-380-fill-valve-diaphragm-seal","title":"Geberit Type 380 Fill Valve Diaphragm Seal — Genuine Service Part | Ref: 240.771.00.1","description":"\u003cp\u003eThe \u003cstrong\u003eGeberit Type 380 Fill Valve Diaphragm Seal\u003c\/strong\u003e (ref: 240.771.00.1) is the genuine Geberit service part for restoring correct operation to a Type 380 side inlet fill valve. Over time, the diaphragm can harden or calcify, causing the cistern to run continuously, refill slowly, or shut off inconsistently. Replacing this small component is a fast, cost-effective fix that avoids a full valve replacement. Genuine Geberit part — exact fit guaranteed.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eGenuine Geberit service part — exact fit for Type 380 side inlet fill valves\u003c\/li\u003e\n\u003cli\u003eResolves continuously running or overfilling cisterns\u003c\/li\u003e\n\u003cli\u003eFixes slow or incomplete refill after flushing\u003c\/li\u003e\n\u003cli\u003eEliminates noisy or erratic fill valve operation caused by a hardened or calcified diaphragm\u003c\/li\u003e\n\u003cli\u003eCost-effective repair — extends the life of your existing fill valve\u003c\/li\u003e\n\u003cli\u003eGeberit part reference: 240.771.00.1\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eTechnical Specification\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Geberit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible With:\u003c\/strong\u003e Geberit Type 380 Side Inlet Fill Valve\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Reference:\u003c\/strong\u003e 240.771.00.1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Diaphragm Seal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGenuine Geberit Part:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eComplete the Repair\u003c\/h2\u003e\n\u003cp\u003eIf the diaphragm alone doesn't resolve the issue, you may need to replace the full fill valve:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/geberit-type-380ag-fill-valve\"\u003eGeberit Type 380AG Side Supply Fill Valve\u003c\/a\u003e — universal fit for Sigma, Omega, Delta \u0026amp; Monolith cisterns\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/geberit-fill-valve-type-380ag-boxed-pack\"\u003eGeberit Type 380AG Fill Valve — Boxed Retail Pack\u003c\/a\u003e — bottom entry, WRAS approved\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHow do I know if this is the right part?\u003c\/strong\u003e\u003cbr\u003eThis diaphragm seal is for the Geberit Type 380 side inlet fill valve only. Check your existing valve for the Type 380 marking or refer to your cistern documentation. The Geberit part reference is 240.771.00.1.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill this fix a continuously running cistern?\u003c\/strong\u003e\u003cbr\u003eIn many cases, yes — a hardened or calcified diaphragm is a common cause of a running cistern. Replacing the diaphragm is the recommended first step before replacing the full valve.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs this a genuine Geberit part?\u003c\/strong\u003e\u003cbr\u003eYes — this is a genuine Geberit service component, ensuring exact fit and compatibility with Type 380 fill valves.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I order if the item shows as out of stock?\u003c\/strong\u003e\u003cbr\u003eYes — we can still take your order and will advise on lead times. Contact us at \u003ca href=\"mailto:customerservice@bubblegumbathrooms.co.uk\"\u003ecustomerservice@bubblegumbathrooms.co.uk\u003c\/a\u003e or call 01603 381095.\u003c\/p\u003e","brand":"Geberit","offers":[{"title":"Default Title","offer_id":54433432764753,"sku":"240.771.00.1","price":14.95,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0997\/3687\/9441\/files\/30702_2_640x640_e564d846-b6d2-4e57-b3b6-0aae9fa0a292.jpg?v=1785320750","url":"https:\/\/bubblegumbathrooms.com\/products\/geberit-type-380-fill-valve-diaphragm-seal","provider":"Bubblegum Bathrooms","version":"1.0","type":"link"}