{"product_id":"fluidmaster-pro400uk-bottom-entry-fill-valve-height-adjustable","title":"Fluidmaster PRO400UK 1\/2\" Bottom Entry Fill Valve | Height Adjustable 230–355mm | Ultra-Quiet","description":"\u003cp\u003eThe Fluidmaster PRO400UK is the professional plumber’s standard 1\/2\" bottom entry fill valve — trusted across the UK for its ultra-quiet operation, fast refill, and dependable long-life performance. Height adjustable from 230mm to 355mm, it fits the majority of standard toilet cisterns straight out of the box. An anti-siphon design protects the water supply from contamination, and the valve meets all relevant UK water fittings regulations.\u003c\/p\u003e\n\n\u003cp style=\"background:#fff8e1;border-left:4px solid #f9a825;padding:12px 16px;margin:16px 0;\"\u003e⚠️ \u003cstrong\u003eBottom Entry:\u003c\/strong\u003e This is a \u003cstrong\u003ebottom entry\u003c\/strong\u003e fill valve — the water supply connects from underneath the cistern. If your supply enters from the \u003cstrong\u003eside\u003c\/strong\u003e, you need a side-entry valve instead. Please check your cistern configuration before ordering.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeight adjustable 230–355mm\u003c\/strong\u003e — fits the majority of standard UK cisterns\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUltra-quiet operation\u003c\/strong\u003e — minimal noise and water hammer\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFast refill\u003c\/strong\u003e — efficient water delivery for quick turnaround between flushes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAnti-siphon design\u003c\/strong\u003e — prevents backflow and protects the drinking water supply\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1\/2\" BSP bottom entry connection\u003c\/strong\u003e — standard UK cistern fitting\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProfessional grade\u003c\/strong\u003e — preferred by plumbers for reliability and longevity\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eComplies with Water Supply (Water Fittings) Regulations\u003c\/strong\u003e\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 Fluidmaster\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e PRO400UK\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSKU:\u003c\/strong\u003e K07075\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnection type:\u003c\/strong\u003e Bottom entry\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnection size:\u003c\/strong\u003e 1\/2\" BSP\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeight range:\u003c\/strong\u003e 230–355mm (adjustable)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAnti-siphon:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompliance:\u003c\/strong\u003e Meets UK Water Supply (Water Fittings) Regulations\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.5 kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Spain\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBarcode:\u003c\/strong\u003e 0039961994028\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eDelivery Information\u003c\/h2\u003e\n\u003cp\u003eThis is a small, postable item covered by a one-off small item delivery charge. You can combine it with other small items in a single order and pay just one delivery charge. \u003ca href=\"\/collections\/small-items\" target=\"_blank\"\u003eBrowse all items covered by the small delivery charge\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch2\u003eOther Fluidmaster Products\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/fluidmaster-pro45b-brass-shank-fill-valve-bottom-entry\" target=\"_blank\"\u003eFluidmaster PRO45B Professional Brass Shank Fill Valve | 1\/2\" Bottom Entry | Ultra-Quiet\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/pro750uk-fluidmaster-lever-flush-valve\" target=\"_blank\"\u003eFluidmaster PRO750UK Professional Dual Flush Valve | Universal Fit\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/fluidmaster-replacement-button-for-pro820uk\" target=\"_blank\"\u003eFluidmaster PRO820UK Replacement Dual Flush Button \u0026amp; Rod\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWhat’s the difference between the PRO400UK and PRO45B?\u003c\/strong\u003e\u003cbr\u003eBoth are 1\/2\" bottom entry fill valves, but the PRO45B features a \u003cstrong\u003eheavy-duty brass shank\u003c\/strong\u003e for superior durability, corrosion resistance, and longevity — making it the preferred choice for demanding or commercial installations. The PRO400UK is the standard professional-grade option suitable for most residential and commercial applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill this fit my cistern?\u003c\/strong\u003e\u003cbr\u003eThe PRO400UK adjusts from 230mm to 355mm in height, covering the majority of standard UK toilet cisterns. Confirm your cistern has a 1\/2\" bottom-entry water supply connection before ordering. If you’re unsure, \u003ca href=\"mailto:customerservice@bubblegumbathrooms.co.uk\"\u003econtact us\u003c\/a\u003e with your cistern model.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is anti-siphon protection?\u003c\/strong\u003e\u003cbr\u003eThe anti-siphon design prevents water from being drawn back from the cistern into the main water supply — an important hygiene and regulatory requirement under UK Water Supply (Water Fittings) Regulations.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow quickly will my order be dispatched?\u003c\/strong\u003e\u003cbr\u003eIf the item shows as in stock, it will be dispatched within 48 hours. If the item is showing as 0 stock, it is ordered in specially for you and will typically be dispatched within 4 working days.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I order if the item shows as out of stock?\u003c\/strong\u003e\u003cbr\u003eYes — you can still place an order and we’ll source it for you. Contact us at \u003ca href=\"mailto:customerservice@bubblegumbathrooms.co.uk\"\u003ecustomerservice@bubblegumbathrooms.co.uk\u003c\/a\u003e or call 01603 381095 if you need a lead time estimate.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs delivery free?\u003c\/strong\u003e\u003cbr\u003eThis is a small postable item with a one-off small item delivery charge. You can combine multiple small items in one order and pay a single charge.\u003c\/p\u003e","brand":"Fluidmaster","offers":[{"title":"Default Title","offer_id":52806127845713,"sku":"K07075","price":17.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0997\/3687\/9441\/files\/k07075-extra-large.jpg?v=1768214318","url":"https:\/\/bubblegumbathrooms.com\/products\/fluidmaster-pro400uk-bottom-entry-fill-valve-height-adjustable","provider":"Bubblegum Bathrooms","version":"1.0","type":"link"}