What Keraflo does

Keraflo Limited is a UK-based industrial manufacturer founded in 1983 in Aylesbury, Buckinghamshire, and now operating as a subsidiary of Genuit Group PLC. The company designs, manufactures, and sells two product families for cold water storage tanks in commercial and public buildings: the Aylesbury range of delayed action mechanical float valves (K, KAX, KB, and KP Type variants) and the Tanktronic electronic tank management system. Its core technology is a patented ceramic disc sealing mechanism on rotating, pressure-compensated discs, combined with polyethylene closed-cell foam floats, enabling maintenance-free operation and elimination of water hammer, valve bounce, and pump hunting. The Tanktronic platform adds electronic water level and temperature monitoring, BMS integration via volt-free contacts, multi-tank management, holiday scheduling, and modular expansion (S-Modules, Battery Module, Repeater Unit).

Keraflo holds ISO 9001:2015 certification, WRAS approvals on its valve range, and LPCB approval to LPS 2083 for fire sprinkler tank valves (the first products to achieve this standard in the UK). Products are manufactured at a facility in Woodley, Reading, and priced as premium industrial components ranging from £172 (float assemblies) to £3,482 (Tanktronic Control Valves), with free UK delivery above £600 and VAT-exclusive B2B pricing. The company sells directly through its own e-commerce storefront and a National Sales Team, supplemented by trade stockists and installers, and targets building services consultants, mechanical contractors, and facilities managers as specification buyers.

The customer base is diversified across UK enterprise and public sector verticals including healthcare (NHS hospitals), sports stadia (Wembley Stadium, Arsenal's Emirates Stadium), commercial real estate (Westfield London, Central St Giles, Carmelite Riverside, Capitol Building), education (University of Warwick, St Andrews Primary School), and government/defence (UK Ministry of Defence Allenby/Connaught PFI project, ~600 valves over a 10-year programme). The business model is one-time unit sales of valves, electronic systems, spare parts, and accessories, with a focus on specification-led demand generation through BIM objects, technical downloads, case studies, and a 'Spec My Valve' enquiry service.

Name

Keraflo

Legal name

Keraflo Ltd

Website

https://www.keraflo.co.uk

Company type

Private

Founded year

1983

Operating status

Operating

Headcount range

11–50 employees

Short description

Keraflo manufactures electronic tank management systems and delayed action mechanical floating valves for cold water storage tanks.

Ownership category

akta.pro rank

Product category

Water Management / Plumbing Equipment

NAICS

Industrial Valve Manufacturing (332911)

akta.pro primary industry

Seals, Gaskets & Fluid Connectors (O-rings, packings, rotary seals, quick couplers) (IMAHAGAI)

Keywords

• Float valves
• Cold water storage
• Tank management systems
• Delayed action valves
• Sprinkler tank valves

Headquarters

HQ city

Reading

HQ country

United Kingdom

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Personnel, Supply Chain, Operations, Marketing or Sales, Technology or R&D, Infrastructure

Revenue model

1. Mechanical Float Valve Sales: Sale of Aylesbury brand delayed action float valves (K, KAX, KB, KP Type) for cold water storage tanks. Products are precision-engineered, manufactured in the UK under ISO 9001:2015, and priced as premium industrial components.
2. Tanktronic Electronic System Sales: Sale of Tanktronic electronic tank management systems including control units, sensors, servo ceramic valves, control valves, and expansion modules for commercial water storage monitoring and control.
3. Spare Parts Sales: Sale of genuine Keraflo spare parts including actuator cups, actuator wheels, discharge assemblies, float arm assemblies, spares kits, and valve body sub-assemblies for maintenance of existing installations.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels5 records

Core offering

Keraflo designs and manufactures the Aylesbury range of delayed action mechanical float valves (K, KAX, KB, KP Types and LPS 2083-compliant Sprinkler Tank Valves) and the Tanktronic electronic tank management system for monitoring and controlling cold water storage tanks. Products are manufactured in the UK under ISO 9001:2015, use patented ceramic disc sealing technology, and are sold primarily to commercial and public sector building services customers (consultants, contractors, facilities managers).

Product overview

Keraflo offers two main product lines: the Aylesbury range of delayed action mechanical float valves and the Tanktronic electronic tank management system. The Aylesbury product line includes K Type, KAX Type, and KB Type float valves plus KP Type valve kits, all using patented ceramic disc technology for controlling water levels in cold water storage tanks. The Tanktronic system is an electronic monitoring and management platform comprising a Control Unit with sensor, Servo Ceramic Valves, Control Valves, and expansion modules (Battery Module, Repeater Unit, S-Module) that monitor water levels, temperature, and manage tank filling. Both product lines work independently or together to provide complete water management solutions for commercial buildings.

Differentiator

Problem solved

Functional benefit

Brands

• Aylesbury: The Aylesbury range of delayed action mechanical float valves, including K Type, KAX Type, and KB Type variants, synonymous with float valve excellence.
• Tanktronic

Products and services

• Aylesbury K Type Float Valve Delayed action mechanical float valve suitable for cold water storage tanks without raised valve chambers. Uses pressure-compensated rotating ceramic discs with a non-adjustable ~75mm operating differential. Available in sizes 3/4" to 3" in Standard Flow, High Flow and Reduced Bore variants.
• Aylesbury KAX Type Float Valve Delayed action float valve primarily for tanks with raised valve chambers. Operates identically to the K Type but with extended drops, suitable for Type AA and AB air gaps.
• Aylesbury KB Type Float Valve Fully variable delayed action float valve suitable for tanks with or without raised valve chambers. Offers up to 1,820mm opening/closing differential for precise matching of tank capacity to demand in larger tanks and pumped systems.
• Aylesbury KP Type Float Valve Kit Control valve with pilot valve kit for large cold water storage tanks. Combines an in-line Control Valve with an Aylesbury KB Type pilot valve; available in Standard and Twin Tank models from 1.5" to 6".
• Fire Sprinkler Tank Valves (LPS 2083) First-to-market LPCB-approved float valves compliant with Loss Prevention Standard LPS 2083 for automatic water level control in above-ground suction tanks for sprinkler systems. Available in 1", 2" (single head) and 3" (twin head) models with ruggedised materials.
• Tanktronic Electronic Tank Management System Electronic system that monitors water levels and temperature and manages tank filling via connected servo ceramic and control valves. Integrates with BMS through volt-free contacts, supports holiday scheduling and two-stage alerts, and can manage up to 4 sensors, 8 Servo Ceramic Valves and 2 Control Valves plus third-party devices.
• Float Assembly (Spare Part) Replacement float assembly for Aylesbury KB Type fully variable delayed action float valves. Available in Small (175mm), Medium (250mm) and Large (300mm) sizes.
• Actuator Cup (Spare Part) Replacement actuator cup for all Aylesbury K, KAX or KB Type valves sized from 3/4" up to 3" Reduced Bore.
• Actuator Wheel - Current Valves (Spare Part) Replacement actuator wheel for Aylesbury K, KAX or KB Type delayed action float valves manufactured after 2009.
• Actuator Wheel - Old Valves (Spare Part) Replacement actuator wheel for Aylesbury K, KAX or KB Type delayed action float valves manufactured before 2009.
• Cast Outlet Flange (Spare Part) DZR brass cast outlet flange for K, KAX or KB Type valves sized from 1 1/4" to 3", suitable for all valves with copper discharge.
• Discharge Assembly (Spare Part) Discharge assembly for use with Aylesbury delayed action float valves, available in multiple diameter options.
• Float Arm Assembly (Spare Part) Float arm assembly for Aylesbury K Type or KAX Type delayed action float valves, available in multiple dimensions.
• Actuator Tube Assembly (Spare Part) Actuator tube assembly for Aylesbury KB Type fully variable delayed action float valves.
• Link Tube Assembly (Spare Part) Link tube assembly for KB Type valves sized from 2" High Flow up to 3" Reduced Bore, used to link actuator tubes.
• Drop Plate Assembly (Spare Part) Drop plate assembly for Aylesbury KAX Type delayed action float valves.
• K Type to KAX Type Conversion Kit Conversion kit that converts an Aylesbury K Type delayed action float valve to a KAX Type equivalent.

Quantifiable outcome

• Zero maintenance required for ceramic disc sealed valves over extended operational periods
• +4 more outcomes

Named customers12 records

Segments7 records

Ideal customer profiles6 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration1 record

Feature5 records

Partnerships

Eleven partnerships are on record, tiered core, major and minor.

• Aspire Defence LtdcoreStrategic or Co-development PartnerAspire Defence Ltd awarded Keraflo a contract to supply Aylesbury float valves across the entire Allenby/Connaught Project, the largest PFI accommodation and services project undertaken by the UK MOD. Keraflo valves were selected for reliable and efficient water storage control across 200+ construction sites serving military personnel accommodation.
• BSS (British Software Services)majorChannel Partner/ Reseller/ DistributorBSS served as the supply chain distributor for Keraflo Aylesbury valves and GRP water storage tanks on the MOD Allenby/Connaught project.
• Hurlstone & PartnersminorChannel Partner/ Reseller/ DistributorKeraflo agents Hurlstone & Partners supplied valves to Dewey Waters for the Queens Hospital Burton on Trent installation.
• Dewey Waters LtdmajorStrategic or Co-development PartnerTank manufacturer Dewey Waters specified and installed Keraflo valves across multiple projects including Queens Hospital, St Andrews Primary School, and other installations.
• Balmoral Tanks LtdmajorStrategic or Co-development PartnerBalmoral Tanks, a leading UK tank manufacturer, specified Keraflo Aylesbury valves alongside their WRAS approved GRP water storage tanks on major projects including Arsenal's Emirates Stadium and MOD sites.
• Buro HappoldmajorImplementation/ SI/ Consulting PartnerConsulting engineers Buro Happold specified Keraflo Aylesbury KP Type valve kits for Emirates Stadium, selecting valves for rapid tank filling and accurate water level matching to occupancy.
• Roger S Bullock AssociatesminorImplementation/ SI/ Consulting PartnerDesign consultant Roger S Bullock Associates selected Keraflo valves for Queens Hospital Burton on Trent refurbishment to ensure simultaneous fill of dual on-line tanks.
• Silcock Dawson & PartnersminorImplementation/ SI/ Consulting PartnerServices consultants Silcock Dawson & Partners designed the water storage systems for Westfield London Shopping Centre using Keraflo float control valves.
• Imtech GroupminorImplementation/ SI/ Consulting PartnerSub-contractors Imtech Group specified and installed Tanktronic system for Carmelite Riverside building for safe and flexible water supply management.
• Kellogg Brown & Root (KBR)majorImplementation/ SI/ Consulting PartnerKBR was part of the Carillion-KBR consortium delivering the £8bn Allenby/Connaught MOD project where Keraflo valves were specified across all sites.
• Kier ConstructionminorImplementation/ SI/ Consulting PartnerKier Construction developed the Twin KP valve system with Keraflo for overcoming simultaneous filling problems in divided tanks at Ipswich Hospital.

Scale indicators4 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Reliance Valves: UK-based manufacturer of float valves, water control valves, and pressure equipment for commercial and domestic water systems. Directly competes with Keraflo in float valves and water-level control, sharing the same UK specification-channel customers.
• Cla-Val: Manufacturer of automatic control valves for waterworks, including float and altitude valves for water storage tanks. Highly comparable product category (water level/flow control valves) serving similar municipal and commercial applications globally.
• Oventrop: German manufacturer of valves, controls, and regulation systems for building services including HVAC and water storage. Comparable specification-led commercial building water control portfolio, often specified by the same consulting engineers that specify Keraflo.
• Crane Fluid Systems: UK-based manufacturer of valves for water and building services including float valves and control valves for cold water storage tanks. Direct competitor in the UK specification market and a natural alternative to Aylesbury valves in commercial projects.
• AVK Holding: European manufacturer of valves for water supply, treatment, and distribution including float and control valves for water storage tanks. Comparable product range and serves similar commercial and municipal water infrastructure customers across Europe.
• Altecnic: UK manufacturer of valves, fittings, and water control equipment for building services and heating. Comparable specification-led product portfolio targeting UK mechanical contractors and consulting engineers.
• Talis Group: European water infrastructure group offering valves and flow control solutions for water storage, treatment, and distribution. Directly comparable in water-level and float valve products serving municipal and commercial water storage applications.

Broad incumbents

• Watts Water Technologies: Global manufacturer of water management products including valves, flow control, and water safety devices for commercial and residential applications. Offers overlapping products but as part of a much broader plumbing, heating, and water quality portfolio.
• IMI plc: UK-listed flow control group with critical engineering, HVAC, and hydronic building solutions divisions. Overlaps with Keraflo in building-services flow control, but operates at much greater scale and broader scope including pneumatic and hydraulic control.
• Honeywell Building Technologies: Major BMS and building automation provider with integrated water management, metering, and leak detection offerings. Competes indirectly through BMS platforms that increasingly include tank monitoring similar to Keraflo's Tanktronic.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks5 records

Key highlights6 records

Customer concentration

• Xx.com/Keraflo

Compliance4 records

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Keraflo