RELIANCE WATER CONTROLS LIMITED

What RELIANCE WATER CONTROLS LIMITED does

Reliance Water Controls Limited is a UK-domiciled subsidiary operating the John Guest brand of plumbing fittings and water control solutions, wholly owned by Reliance Worldwide Corporation Limited (ASX: RWC), a publicly listed Australian parent. The entity is registered in Evesham, Worcestershire with 11 direct employees per firmographic data, though the John Guest brand it operates has over 65 years of engineering heritage and is deployed globally across the Americas, Europe, and Asia-Pacific.

The company's product portfolio centers on proprietary push-fit connection technology and water control valve engineering. Core product lines include Speedfit (push-fit plastic fittings, valves, hoses, and pipe), SharkBite (DZR brass fittings and valves for corrosion resistance), MDPE (medium-density polyethylene push-fit and compression fittings), and the Reliance sub-brand for temperature control, flow control, and specialist combination valves. Supporting categories include Underfloor Heating Systems (manifolds, controls, single-room packs), Fluid/Air/Water Treatment (PolarClean, compressed air, pneumatic), and Pipe & Tube Systems. Recent launches (2023-2026) include Plastic Plumbing Manifolds, a Tenant Valve Range for multi-occupancy buildings, and MDPE Compression Fittings for harsh environments.

The business operates a hardware sales revenue model via three channels: trade distribution and Where to Buy networks serving installers and consumers, direct website sales with quote-based pricing for project-specific work, and OEM partnerships embedding components into larger systems. The customer base spans new build residential, retrofit, multi-occupancy, commercial offices, public/community buildings, agriculture, and OEM segments. GTM combines product-led content (CPD training courses, installation guides, system selectors, case studies) with engineering-led enterprise field sales supporting specifiers and OEM partners across 15+ localized country markets.

Name

RELIANCE WATER CONTROLS LIMITED

Legal name

Reliance Worldwide Corporation Limited

Website

https://rwc.co.uk

Company type

Public

Operating status

Operating

Headcount range

11–50 employees

Ownership category

akta.pro rank

Product category

Plumbing & Heating Fittings

NAICS

Automatic Environmental Control Manufacturing for Residential, Commercial, and Appliance Use (334512), Plastics Pipe and Pipe Fitting Manufacturing (326122)

SIC

Auto Controls For Regulating Residential & Comml Environments (3822), Wholesale-Hardware & Plumbing & Heating Equipment & Supplies (5070)

akta.pro primary industry

Plumbing Valves & Controls (Shutoff, Mixing, Backflow) (IMADALAB)

akta.pro secondary industry

Hoses, Tubing & Fittings (Hydraulic/Pneumatic Lines & Connectors) (IMAHAGAH)

Keywords

• Push-fit plumbing fittings
• Water control valves
• Underfloor heating systems
• Plumbing heating solutions
• Fluid handling systems

Headquarters

HQ city

Not specified

HQ country

United Kingdom

HQ region

Europe

Offices3 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Plumbing & Heating Products: Sale of push-fit fittings, valves, pipes, and water control solutions for domestic and commercial plumbing and heating applications
2. Underfloor Heating Systems: Complete underfloor heating solutions including manifolds, controls, and accessories for residential and commercial buildings
3. Fluid & Water Treatment Products: Push-fit connection solutions for fluid delivery, air systems, and water treatment applications
4. OEM Solutions: Connection and control components integrated within wider plumbing, heating, air and fluid systems for OEM partners

Go-to-market motion2 records

Distribution channels3 records

Marketing channels6 records

Core offering

Reliance Water Controls Limited, operating as the John Guest brand, designs, manufactures and supplies push-fit plumbing fittings, water control valves, underfloor heating systems, and pipe and tube solutions for plumbing, heating, fluid and air applications. The product portfolio serves installers, specifiers, OEM partners, and trade distributors across residential, commercial, multi-occupancy, agricultural, marine and industrial end markets.

Product overview

John Guest, operating under Reliance Worldwide Corporation Limited, offers a comprehensive portfolio of connection technologies, plumbing fittings, and water control solutions organized across multiple product lines. The core offerings include Speedfit (push-fit fittings and valves), SharkBite (DZR brass fittings and valves), MDPE (compression and push-fit fittings), and Reliance (temperature and flow control valves, heating components, specialist valves). Supporting product categories include Underfloor Heating Systems (manifolds, controls, pipe fixing), Fluid/Air/Water Treatment (metric/imperial fittings, PolarClean, compressed air), and Pipe & Tube Systems (plastic/metal pipe, LLDPE tubing). The portfolio serves plumbing and heating, OEM, industrial cooling, marine, automotive, agriculture, and mobile home applications.

Differentiator

Problem solved

Functional benefit

Brands

• Speedfit: Push-fit plumbing and heating fittings system for domestic and commercial applications
• SharkBite
• MDPE
• Reliance
• PolarClean

Products and services

• Speedfit Push-fit pipe connection system offering fittings, valves, hoses, pipe and accessories for plumbing and heating applications, enabling efficient installation without specialized tools.
• SharkBite DZR (Dezincification Resistant) brass fittings, valves, and accessories providing corrosion-resistant connections for plumbing and heating systems in commercial and residential applications.
• MDPE Medium Density Polyethylene pipe connection solutions including push-fit fittings and compression fittings for water supply applications, with the compression fittings line engineered for heavy-duty use in tough environments and harsh weather.
• Reliance Valves and Controls Water control solutions including temperature control valves, flow control valves, heating system components, and combination and specialist valves for plumbing and heating systems, including the Tenant Valve Range for multi-occupancy buildings and plastic plumbing manifolds for centralized water distribution.
• Underfloor Heating Systems Complete UFH systems including pipe fixing systems, manifolds and control packs, heating controls, single room packs, pipe, service kits and spares, and accessories engineered for energy-efficient heating performance.
• Fluid, Air and Water Treatment Push-fit pipe connection solutions for fluid delivery, air systems, and water treatment applications including metric and imperial fittings, valves, PolarClean, compressed air and pneumatic systems, blown fibre solutions, and pipe & tubing.
• Pipe & Tube Systems Flexible pipe and tubing solutions including plastic pipe, LLDPE tubing, metal pipe, and accessories supporting reliable water and fluid delivery across plumbing, heating and industrial applications.
• PolarClean Water treatment and cleaning connection solution for beverage installations and water treatment applications.

Quantifiable outcome

• Efficient, right-first-time installation reducing on-site complexity and keeping projects on schedule
• +1 more outcomes

Segments7 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

One partnership is on record.

• Reliance Worldwide Corporation Limited (RWC)coreOthersRWC is the parent company of John Guest brand. John Guest is owned and operated as part of the Reliance Worldwide Corporation portfolio of connection technologies and water control solutions. The company website displays RWC branding and ownership.

Scale indicators3 records

Recent moves5 records

Expansion highlights5 records

Direct peers

• Uponor Corporation: Finnish-listed manufacturer of plastic pipe systems, push-fit and compression fittings, and underfloor heating solutions. Directly competes with Speedfit, MDPE, and John Guest's underfloor heating portfolio across Europe and North America.
• NIBCO Inc. US manufacturer of plumbing fittings, valves, and flow control products in brass, copper, and plastic. Comparable to Reliance's SharkBite DZR brass and Speedfit plastic fittings portfolios sold through trade distribution in North America.
• Rehau Group: German polymer-based solutions provider including plumbing pipe systems, underfloor heating, and water management. Comparable to Reliance's MDPE pipe, push-fit fittings, and UFH system categories across European and selective global markets.
• Watts Water Technologies: US-listed manufacturer of water control valves, plumbing fittings, and water quality products. Directly comparable to Reliance Water Controls across brass valves, pressure regulation, and plumbing/heating fittings for residential and commercial use.
• Viega GmbH & Co. KG: German privately-held manufacturer of plumbing fittings, push-fit connection systems, and pipe technology. Directly comparable to John Guest on proprietary push-fit installation technology and installer-focused distribution.
• Georg Fischer / GF Piping Systems: Swiss-listed manufacturer of plastic and metal piping systems, fittings, and valves for industrial, plumbing, and water distribution. Comparable to Reliance's push-fit and MDPE product lines and to its global multi-material distribution footprint.
• Caleffi Hidráulica: Italian manufacturer of plumbing and heating components including thermostatic mixing valves, pressure reducing valves, and underfloor heating manifolds. Closely comparable to Reliance's Reliance valve range and UFH systems serving installers and specifiers.
• Wavin (part of Orbia): Dutch-headquartered plastic pipe and fittings manufacturer serving plumbing, heating, and underground infrastructure. Comparable to Reliance's MDPE compression and plastic push-fit product lines across European residential and commercial markets.

Broad incumbents

• Danfoss A/S: Danish global manufacturer of heating, cooling, and water controls for buildings and industry. Overlaps with Reliance's heating controls, TMVs, and pressure reducing valves but operates at a much broader scale across HVAC and refrigeration.
• Honeywell International: US-listed industrial conglomerate with water controls, thermostatic mixing valves, and building automation solutions. Comparable to Reliance's water control and heating control product lines but as part of a much broader portfolio across aerospace, automation, and building technologies.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/c/JohnGuestLtd
• Facebookfacebook.com/JGJohnGuest
• LinkedInlinkedin.com/company/reliance-water-controls-limited
• Instagraminstagram.com/jgjohnguest

Revenue estimate

Valuation estimate

Number of profiles

Subsidiaries1 record

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 RELIANCE WATER CONTROLS LIMITED