Complete UK Stockist Directory: Where to Buy Flush Valves & Siphons
Comprehensive guide to 52+ UK retailers selling toilet flush valves and siphons. Find parts near you from trade counters, DIY stores, online specialists, and manufacturer direct sales.
Why This Directory Exists
With 67 manufacturers producing 225+ unique products, no single plumber can stock every valve type. This directory helps you find the exact part you need.
How to Use This Directory
Identify Your Part First
Use Guide 1 (Identification) to determine exact valve/siphon model and measurements before buying.
Choose Stockist Type
Trade counters for quick collection, online for better selection, manufacturer direct for exact matching.
Check Availability
Call ahead or check online stock before traveling. Many offer next-day collection or same-day delivery.
What to Bring to the Store
Photos of Your Valve
Top view, side view, bottom view, and any visible branding or model numbers.
Measurements
Outlet diameter (50mm most common), height, and cistern depth measurements.
Old Valve (If Possible)
Staff can match exact model or find compatible replacement if you bring the old valve.
Problem Description
Explain symptoms (running toilet, weak flush, etc.) to help staff recommend solution.
Major Trade Counters
Professional trade counters with extensive UK branch networks. Best for same-day collection and trade pricing. Most offer click-and-collect services.
Screwfix
✓ ExcellentStock Range:
- • Flomasta brand (own-brand universal valves)
- • Fluidmaster range (400UK, PRO550UK)
- • Limited brand selection but reliable stock
- • Good seal/diaphragm kit availability
Best For:
Quick collection, budget-friendly universal valves, DIY and trade customers, excellent availability
Toolstation
✓ ExcellentStock Range:
- • Universal dual flush valves (various brands)
- • Fluidmaster products well-stocked
- • Competitive pricing vs Screwfix
- • Good siphon range
Best For:
Trade customers, competitive pricing, quick collection service, budget-conscious buyers
Plumb Center
✓ ComprehensiveStock Range:
- • Extensive brand selection (Geberit, Macdee, etc.)
- • Professional-grade products
- • Technical advice available
- • Can order specific manufacturer models
Best For:
Professional plumbers, specific brand matching, technical support, comprehensive product range
City Plumbing
✓ ComprehensiveStock Range:
- • Professional trade specialists
- • Good Geberit and premium brand stock
- • Helpful staff with technical knowledge
- • Trade account benefits
Best For:
Trade plumbers, premium brands, professional service, technical guidance on complex installations
Wolseley
PremiumStock Range:
- • Premium professional supplier
- • Extensive manufacturer relationships
- • Can source specialist/rare valves
- • Excellent technical support
Best For:
Professional contractors, specific manufacturer models, hard-to-find parts, premium customer service
Travis Perkins
~ GoodStock Range:
- • General builders merchant (not specialist)
- • Basic range of universal valves
- • Good for emergency replacements
- • May need to order specialist items
Best For:
Builders needing plumbing parts alongside other materials, trade account holders, convenient locations
DIY Retailers
High-street DIY chains with good accessibility for homeowners. Helpful staff for DIY advice, though more limited specialist stock than trade counters.
B&Q
Stock:
- • Viva brand (own-brand valves)
- • Universal dual flush valves
- • DIY-friendly packaging and instructions
Wickes
Stock:
- • Good universal valve selection
- • Trade-focused DIY retailer
- • Helpful for bathroom projects
Homebase
Stock:
- • Basic universal valves
- • Limited specialist range
- • Good for simple replacements
Online Specialists
Dedicated online plumbing retailers with extensive ranges and detailed product information. Best for specific model matching and comprehensive selection.
National Shower Spares
Highlights:
- • Excellent for matching specific models
- • Detailed product photos and specifications
- • Helpful customer service team
- • Next-day delivery available
Plumbworld
Highlights:
- • Wide range of bathroom and plumbing products
- • Good selection of flush valves and siphons
- • Competitive pricing
- • Free delivery on orders over £499
Victorian Plumbing
Highlights:
- • Large bathroom products specialist
- • Good toilet parts selection
- • Premium and budget options available
- • Helpful product reviews
Tap Warehouse
Highlights:
- • Bathroom fittings specialist
- • Good selection of cistern parts
- • Fast dispatch times
- • Helpful installation guides
Bathroom City
Highlights:
- • Extensive bathroom product range
- • Good spare parts section
- • Competitive pricing
- • Price match promise
Tap Trader
Highlights:
- • Budget-friendly online retailer
- • Good universal valve selection
- • Fast delivery options
- • Regular sales and promotions
BES.co.uk
Highlights:
- • Bathroom, electrical, and plumbing specialist
- • Extensive cistern parts range
- • Technical support available
- • Trade and retail customers welcome
PlumbNation
Highlights:
- • Online plumbing supplies specialist
- • Good flush valve selection
- • Helpful product descriptions
- • Free delivery on orders over £50
General Builders Merchants
Traditional builders merchants with plumbing departments. Good for combining plumbing parts with other building materials. Trade accounts available.
Jewson
Stock:
- • Basic universal valve range
- • Trade-focused supplier
- • Can order specialist items
Buildbase
Stock:
- • Limited plumbing range
- • Universal valves usually available
- • Good for emergency replacements
MKM Building Supplies
Stock:
- • Growing plumbing department
- • Trade-oriented service
- • Helpful local branches
Selco Builders Warehouse
Stock:
- • Trade-only warehouse (ID required)
- • Basic plumbing essentials
- • Competitive trade pricing
Covers Builders Merchants
Stock:
- • Regional builder's merchant
- • Plumbing department varies by branch
- • Good local service
Huws Gray
Stock:
- • Growing UK presence
- • Plumbing supplies available
- • Trade account benefits
Manufacturer Direct Sales
Buy directly from major manufacturers for guaranteed compatibility and access to complete product ranges. Best for specific brand matching and technical support.
Geberit UK
Why Buy Direct:
- • Complete Geberit product catalogue
- • Technical specifications and CAD drawings
- • Spare parts guarantee
- • Professional technical support team
Thomas Dudley Ltd
Why Buy Direct:
- • Full Vantage, Turbo88, and Hydroflo ranges
- • Spare parts for older models
- • UK-manufactured quality
- • Expert technical advice
Fluidmaster UK
Why Buy Direct:
- • Complete Fluidmaster product range
- • Installation guides and videos
- • Compatibility checker tool
- • Where-to-buy store locator
Macdee
Why Buy Direct:
- • Complete Macdee Metro and Kayla ranges
- • Spare parts for Macdee models
- • Technical data sheets
- • Product compatibility information
Siamp UK
Why Buy Direct:
- • Complete Siamp Optima and Skipper ranges
- • Innovative dual flush technology
- • Spare parts availability
- • International quality standards
Ideal Standard
Why Buy Direct:
- • Spare parts for Ideal Standard toilets
- • Complete bathroom suite compatibility
- • Premium quality components
- • Extended warranty options
Online Marketplaces
Large online marketplaces with extensive third-party sellers. Great for price comparison and finding discontinued models, but verify seller reputation carefully.
Amazon UK
⚠️ Important:
- • Check seller ratings carefully
- • Verify exact model compatibility
- • Read customer reviews thoroughly
- • Prime eligible = easier returns
Best For:
Wide selection, next-day delivery, customer reviews, discontinued models
eBay UK
⚠️ Important:
- • Check seller feedback score
- • Verify return policy before buying
- • Great for obsolete/discontinued parts
- • Use "Buy It Now" for urgent needs
Best For:
Discontinued models, obsolete parts, used valves, competitive prices
ManoMano
Highlights:
- • Growing DIY marketplace
- • Good plumbing parts selection
- • Competitive pricing
- • European sellers included
Best For:
DIY projects, price comparison, European brands, alternative to Amazon/eBay
Regional Availability Across UK
Stock availability and branch coverage varies by region. Here's what to expect across England, Scotland, Wales, and Northern Ireland.
England
Best Coverage:
- • Screwfix, Toolstation: Excellent nationwide coverage (700+ and 500+ branches)
- • Plumb Center, City Plumbing: Strong coverage in all major towns
- • B&Q, Wickes: Good high-street presence
- • Travis Perkins, Jewson: Widespread builders merchant network
Hampshire/Wiltshire Focus: All major stockists well-represented. Andover, Winchester, Salisbury, Swindon have excellent trade counter and DIY retailer coverage.
Scotland
Coverage Notes:
- • Screwfix, Toolstation: Good coverage in major cities
- • City Plumbing, Plumb Center: Strong presence in Glasgow, Edinburgh
- • B&Q, Wickes: Available in most towns
- • Builders merchants: Regional chains supplement national brands
Tip: Remote areas: Online ordering with delivery often better than long drives. Check local independent plumbing suppliers.
Wales
Coverage Notes:
- • Screwfix, Toolstation: Good coverage in South Wales, Cardiff area
- • Builders merchants: Good presence in major towns
- • B&Q: Available in larger towns
- • North Wales: More limited, consider online ordering
Tip: Rural areas: Plan ahead and use click-and-collect to guarantee availability. Online specialists deliver nationwide.
Northern Ireland
Coverage Notes:
- • Screwfix, Toolstation: Present in Belfast and major towns
- • B&Q, Homebase: Available in larger towns
- • Local builders merchants: Important alternative
- • Online ordering: Often best option for specialist parts
Tip: Some UK online retailers charge extra for NI delivery. Check delivery costs before ordering. Local independent merchants may have better stock.
Price Comparison: Common Products
Typical price ranges for common flush valves and siphons across different stockist types. Prices accurate as of January 2025.
| Product Type | Budget (DIY) | Mid-Range (Trade) | Premium (Specialist) |
|---|---|---|---|
| Universal Dual Flush Valve | £8-£15 | £15-£28 | £28-£45 |
| Lever Siphon (Full Unit) | £12-£20 | £20-£35 | £35-£55 |
| Siphon Diaphragm/Seal Only | £3-£6 | £6-£12 | £12-£18 |
| Geberit Impuls Valve | N/A | £45-£65 | £65-£85 |
| Fluidmaster PRO550UK | £18-£25 | £25-£35 | £35-£42 |
| Thomas Dudley Vantage Valve | N/A | £28-£40 | £40-£55 |
💰 Budget Tier
Where: B&Q, Homebase, Screwfix own-brands
Best For: Simple replacements, rental properties, temporary fixes
⚙️ Mid-Range Tier
Where: Toolstation, Plumb Center, online specialists
Best For: Most homeowners, reliable quality, good warranties
⭐ Premium Tier
Where: Wolseley, manufacturer direct, specialists
Best For: High-end bathrooms, exact brand matching, long-term reliability
🚨 Emergency & Same-Day Collection
When you need a replacement valve urgently, these stockists offer the best options for immediate collection or same-day delivery.
Best for Same-Day Collection
Screwfix Click & Collect
Order online, collect in-store within 1 hour. 700+ UK branches. Check stock online before ordering.
Toolstation Click & Collect
Similar service to Screwfix. 500+ branches. Often less busy, quicker collection times.
Plumb Center Trade Counter
Walk-in with old valve for immediate matching. Knowledgeable staff can advise on alternatives if exact match unavailable.
B&Q / Wickes
Walk-in shopping with immediate availability. Limited specialist range but good for universal valves.
Same-Day Delivery Options
Amazon Prime
Many flush valves available with same-day or next-day delivery in major cities. Check "Prime" eligible products.
Screwfix Delivery
Same-day delivery available in some areas (check at checkout). Usually £5-£10 delivery charge.
Local Plumbing Specialists
Some online plumbing specialists offer courier delivery in local areas. Call to check availability.
Professional Plumber Supply
If you can't find the part, a local plumber may have stock or can source it same-day through trade channels.
⚠️ Emergency Shopping Strategy
Before You Shop:
- ✓ Take photos of your valve from all angles
- ✓ Measure outlet diameter (50mm most common)
- ✓ Remove old valve if possible to bring with you
- ✓ Check online stock before traveling
- ✓ Call ahead to confirm availability
If Exact Match Unavailable:
- ✓ Consider universal replacement valves (Fluidmaster, etc.)
- ✓ Ask staff about compatible alternatives
- ✓ Buy a temporary universal valve + order exact match online
- ✓ Consider calling a professional plumber (see Guide 6)
Can't Find the Right Part?
If you're struggling to identify or locate the correct flush valve or siphon, professional help is available. We stock common models and can source specialist parts quickly.
Part Identification
We can identify your valve model and source the exact replacement
Common Stock
Van stock includes Geberit, Fluidmaster, Thomas Dudley, and universal valves
Fast Sourcing
Trade accounts with all major suppliers for quick specialist part procurement
Related Guides from This Series
Now that you know where to buy, explore these related guides for complete information.
Guide 1: Identification
4 professional methods to identify your flush valve or siphon model before you shop.
Guide 2: Manufacturers Library
Complete database of 67 manufacturers and 225+ products with compatibility information.
Guide 3: Installation (DIY)
Step-by-step installation guides for seals, siphons, and dual flush valves.