Fluidmaster Toilet Cistern Parts & Accessories

The 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. ⚠️ Bottom Entry: This is a bottom entry fill valve — the water supply connects from underneath the cistern. If your supply enters from the side, you need a side-entry valve instead. Please check your cistern configuration before ordering. Key Features Height adjustable 230–355mm — fits the majority of standard UK cisterns Ultra-quiet operation — minimal noise and water hammer Fast refill — efficient water delivery for quick turnaround between flushes Anti-siphon design — prevents backflow and protects the drinking water supply 1/2" BSP bottom entry connection — standard UK cistern fitting Professional grade — preferred by plumbers for reliability and longevity Complies with Water Supply (Water Fittings) Regulations Technical Specification Brand: Fluidmaster Model: PRO400UK SKU: K07075 Connection type: Bottom entry Connection size: 1/2" BSP Height range: 230–355mm (adjustable) Anti-siphon: Yes Compliance: Meets UK Water Supply (Water Fittings) Regulations Weight: 0.5 kg Country of Origin: Spain Barcode: 0039961994028 Delivery Information This 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. Browse all items covered by the small delivery charge. Other Fluidmaster Products Fluidmaster PRO45B Professional Brass Shank Fill Valve | 1/2" Bottom Entry | Ultra-Quiet Fluidmaster PRO750UK Professional Dual Flush Valve | Universal Fit Fluidmaster PRO820UK Replacement Dual Flush Button & Rod Frequently Asked Questions What’s the difference between the PRO400UK and PRO45B?Both are 1/2" bottom entry fill valves, but the PRO45B features a heavy-duty brass shank 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. Will this fit my cistern?The 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, contact us with your cistern model. What is anti-siphon protection?The 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. How quickly will my order be dispatched?If 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. Can I order if the item shows as out of stock?Yes — you can still place an order and we’ll source it for you. Contact us at customerservice@bubblegumbathrooms.co.uk or call 01603 381095 if you need a lead time estimate. Is delivery free?This 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.

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Restore your Fluidmaster PRO820UK dual flush valve to full working order with this genuine Fluidmaster replacement button and rod assembly. A simple, no-fuss solution that avoids the cost of replacing the entire flush valve — just swap the button and rod and you're back up and running. ⚠️ Compatibility Notice: This button and rod is designed specifically for the Fluidmaster 820074 and PRO820UK flush valves. Please confirm your valve model before ordering. Key Features Genuine Fluidmaster replacement part — made to exact OEM specification Dual flush operation — full and reduced flush modes Adjustable rod length — suits a range of cistern depths Suits standard 40mm cistern holes — easy retrofitting Mechanical button and rod assembly — reliable and simple to install No specialist tools required Technical Specification Brand: Fluidmaster Compatible with: Fluidmaster 820074 & PRO820UK flush valves Flush type: Dual flush (full & reduced) Cistern hole size: Standard 40mm Rod length: Adjustable, extend 19cm from base of button Barcode: 5011629017220 Delivery Information This 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. Browse all items covered by the small delivery charge. Complete Your Fluidmaster Installation Looking for the full flush valve or other Fluidmaster parts? Browse our Fluidmaster range: Fluidmaster PRO750UK Professional Dual Flush Valve Fluidmaster PRO400UK ½" Bottom Entry Fill Valve Fluidmaster PRO45B Brass Shank Fill Valve Fluidmaster Universal Flush Flapper 502074 Fluidmaster Pro Ultra Universal Dual Flush Syphon Frequently Asked Questions Will this fit my flush valve?This button and rod is compatible with the Fluidmaster 820074 and PRO820UK flush valves only. If you're unsure of your valve model, check the label on the valve body inside the cistern, or email us with a photo and we'll confirm compatibility. How quickly will my order be dispatched?If 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. Can I order if the item shows as out of stock?Yes — you can still place an order and we'll source it for you. Delivery is typically within 4 working days of your order. Is delivery free?This 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. I'm not sure which Fluidmaster part I need — can you help?Absolutely. Contact us at customerservice@bubblegumbathrooms.co.uk or call 01603 381095 and we'll identify the right part for you.

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The Fluidmaster PRO750UK is a professional-grade dual flush valve that delivers reliable, water-saving performance in virtually any UK toilet cistern. With adjustable full and reduced flush volumes, universal 1.5" and 2" outlet compatibility, and a quick-release cable connection for tool-free maintenance, it's the go-to choice for plumbers and DIYers alike. Key Features Adjustable dual flush volumes — independently set full and reduced flush to balance water saving with effective waste removal Universal fit — compatible with 1.5" (38mm) and 2" (50mm) flush outlets Flexible button mounting — fits top, front or side of cistern Adjustable overflow height — 8.5" to 13.5" (216–343mm) to suit most cistern sizes 350mm cable — generous length for flexible installation positions Quick-release cable connection — prevents cable damage and simplifies maintenance without tools Twist-and-release action — easy servicing without removing the full valve Professional Fluidmaster quality — trusted by plumbers across the UK What's Included Fluidmaster PRO750UK dual flush valve mechanism 350mm connecting cable Installation hardware Fitting instructions Technical Specification Model: PRO750UK Outlet compatibility: 1.5" (38mm) & 2" (50mm) Cable length: 350mm Overflow height: Adjustable 8.5"–13.5" (216–343mm) Button mounting: Top, front or side Flush volumes: Adjustable (full & reduced) Brand: Fluidmaster SKU: K13490 Barcode: 5060157590651 Frequently Asked Questions Will this fit my cistern?The PRO750UK fits most UK cisterns with 1.5" or 2" flush outlets and an internal height of 216–343mm (8.5"–13.5"). If you're unsure, contact us at customerservice@bubblegumbathrooms.co.uk before ordering. Can I adjust the flush volumes?Yes — both the full flush and reduced flush volumes are independently adjustable, so you can optimise water saving without compromising flush performance. What does the quick-release cable connection do?It prevents cable damage during installation and allows you to disconnect and reconnect the cable without tools, making servicing much faster. Can the button be mounted on the side of the cistern?Yes — the flush button can be mounted on the top, front or side of the cistern, with the 350mm cable giving plenty of reach. Is this suitable for close-coupled and low-level cisterns?Yes, provided the cistern has a 1.5" or 2" outlet and falls within the overflow height range. Can I order if the item shows as out of stock?Yes — if stock shows as 0, you can still place an order and we will dispatch as soon as stock is available. How quickly will my order be dispatched?This item is ordered in as required and will typically be dispatched within 4 working days of your order. Delivery Information This 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. Browse all items covered by the small delivery charge.

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The Fluidmaster PRO45B is the professional plumber’s choice when only the best will do. Its heavy-duty brass shank won’t crack, corrode, or strip — outperforming plastic-shanked alternatives in demanding residential and commercial installations alike. A specially engineered shank design eliminates water hammer and delivers ultra-quiet operation, backed by a 5-year manufacturer’s warranty from the company that invented the fill valve in 1958. Key Features Heavy-duty brass shank — won’t crack, corrode, or strip; outlasts plastic alternatives Ultra-quiet operation — engineered shank design eliminates water hammer and noise Universal fit — compatible with all major toilet brands with 1/2" bottom-entry connections Tool-free water level adjustment — twist the adjustment rod to set float height Code approved — complies with Water Supply (Water Fittings) Regulations 5-year manufacturer’s warranty Technical Specification Brand: Fluidmaster Model: PRO45B SKU: K07084 Connection type: Bottom entry Connection size: 1/2" BSP Shank material: Brass Max water pressure: 150 psi (10.3 bar) Warranty: 5 years Compliance: Code approved; meets UK Water Supply (Water Fittings) Regulations Country of Origin: Spain Barcode: 039961455420 Delivery Information This 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. Browse all items covered by the small delivery charge. Other Fluidmaster Products Fluidmaster PRO400UK 1/2" Bottom Entry Fill Valve | Height Adjustable 230–355mm Fluidmaster PRO750UK Professional Dual Flush Valve | Universal Fit Fluidmaster PRO820UK Replacement Dual Flush Button & Rod Frequently Asked Questions What’s the difference between the PRO45B and PRO400UK?Both are 1/2" bottom entry fill valves. The PRO45B’s key advantage is its heavy-duty brass shank, which offers superior durability and corrosion resistance compared to the plastic shank on the PRO400UK. The PRO45B is the preferred choice for demanding or commercial installations where longevity is paramount. Why is brass better than plastic for the shank?Brass won’t crack under stress, resists corrosion from minerals in the water, and maintains thread integrity through repeated installations. It provides a more rigid, reliable seal and simply outlasts plastic in demanding applications. Is this compatible with my toilet?The PRO45B fits virtually all toilet brands with a 1/2" bottom-entry connection, including Ideal Standard, Armitage Shanks, Roca, Twyford, Duravit, Villeroy & Boch, and many others. Confirm your cistern has a bottom-entry supply before ordering. How quickly will my order be dispatched?If 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. Can I order if the item shows as out of stock?Yes — you can still place an order and we’ll source it for you. Contact us at customerservice@bubblegumbathrooms.co.uk or call 01603 381095 if you need a lead time estimate. Is delivery free?This 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.

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The Fluidmaster 502074 Universal Adjustable Flush Flapper is a premium replacement part designed for most 1.5" and 2" flush valves. This innovative water-saving flapper features adjustable flush volume control, allowing you to optimize water usage while maintaining reliable performance. Key Features & Benefits Adjustable Flush Volume: Rotatable flapper lets you dial in the perfect flush volume for maximum water efficiency Universal Compatibility: Works with most Fluidmaster flush valves (1.5" and 2" sizes) Easy DIY Installation: Simple to install with no special tools required - perfect for homeowners and professionals Kink-Free Chain: Reliable, tangle-resistant chain ensures consistent flushing performance Precision Alignment: Rigid frame design precisely aligns flapper on outlet for optimal seal and water savings Durable Construction: Built to last with quality materials backed by Fluidmaster's reputation Product Specifications Model Number: 502074 Compatible with: 1.5" and 2" Fluidmaster flush valves SKU: K07077 Brand: Fluidmaster Installation & Maintenance This replacement flapper installs quickly and easily, making it ideal for both DIY enthusiasts and professional plumbers. The adjustable design means you can fine-tune your toilet's water consumption, potentially saving hundreds of litres per year. ⚠️ IMPORTANT WARRANTY NOTICE: DO NOT USE IN-TANK DROP-IN TOILET BOWL CLEANERS CONTAINING BLEACH OR CHLORINE. Use of such products will result in damage to tank components and may cause flooding and property damage. Use of such products will void this warranty. Instead, we recommend using Flush 'n Sparkle® automatic toilet bowl cleaner (COMING SOON).

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The Fluidmaster Pro Ultra Universal Dual Flush Syphon delivers professional-grade, water-saving performance in virtually any 1.5" lever-operated toilet cistern. Featuring a long-life butterfly diaphragm, twin flow cap with anti-turbulence outlet, and tool-free rapid height adjustment, it's the reliable choice for plumbers and competent DIYers tackling syphon replacements and upgrades. Key Features Universal 1.5" fit — compatible with virtually all 1.5" (38mm) lever-operated cisterns Adjustable dual flush — independently adjustable full and partial flush volumes for optimal water saving Rapid height adjustment — tool-free adjustment from 7.5" to 9.5" (190–241mm) Butterfly diaphragm — durable, quiet-operation design for long service life Twin flow cap — anti-turbulence outlet for efficient, powerful flushing Easy servicing — removable diaphragm and flow cap, no special tools required Retrofit compatible — direct replacement for Turbo 88, Turbo S44R, and S1-11 syphons Ultra-compact design — suits tight spaces and low-profile cisterns What's Included Fluidmaster Pro Ultra dual flush syphon body Butterfly diaphragm mechanism Twin flow cap with anti-turbulence outlet Height adjustment components Installation instructions Technical Specification Model: Pro Ultra Universal Outlet size: 1.5" (38mm) Height range: 7.5"–9.5" (190–241mm) Operation: Lever-operated dual flush Flush type: Full & partial flush (adjustable volumes) Diaphragm: Butterfly design Flow cap: Twin flow with anti-turbulence outlet Retrofits: Turbo 88, Turbo S44R, S1-11 Brand: Fluidmaster SKU: K96069 Barcode: 5011629016544 Frequently Asked Questions Will this fit my cistern?The Pro Ultra fits virtually all UK 1.5" (38mm) lever-operated cisterns with an internal height of 190–241mm. If you’re unsure, contact us at customerservice@bubblegumbathrooms.co.uk before ordering. What syphons does this replace?It’s a direct retrofit replacement for the Turbo 88, Turbo S44R, and S1-11 syphons, with improved dual flush water saving. How does the dual flush work?Depress the lever and hold for a partial (reduced volume) flush; depress and release immediately for a full flush. Both volumes are independently adjustable. Can I replace just the diaphragm?Yes — the butterfly diaphragm is removable and replaceable without taking out the entire syphon, keeping servicing quick and straightforward. Can I order if the item shows as out of stock?Yes — if stock shows as 0, you can still place an order and we will dispatch as soon as stock is available. How quickly will my order be dispatched?This item is ordered in as required and will typically be dispatched within 4 working days of your order. Delivery Information This 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. Browse all items covered by the small delivery charge.

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