--- title: "Commercial Plumbing in Hertfordshire & the Home Counties | Heatrite" description: "Commercial plumbing across Hertfordshire, Buckinghamshire, Berkshire, Surrey and London. Mains pressure boosting, TMVs, backflow protection, Legionella-aware pipework and full office/retail fit-outs. 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Mains pressure boosting, TMVs, backflow protection, Legionella-aware pipework and full office/retail fit-outs. WRAS compliant." }, { "@context": "https://schema.org", "@type": "FAQPage", "mainEntity": [ { "@type": "Question", "name": "Do you work on Cat A and Cat B fit-outs?", "acceptedAnswer": { "@type": "Answer", "text": "Yes, regularly. Cat A shell plumbing on handover and full Cat B tenant fit-outs, working to the fit-out contractor's programme and attending coordination meetings as required." } }, { "@type": "Question", "name": "Can you handle live sites with minimum disruption?", "acceptedAnswer": { "@type": "Answer", "text": "Yes, we phase work, isolate by zone and run out-of-hours and weekend shifts for sites that can't lose water supply during business hours." } }, { "@type": "Question", "name": "Do you do TMV servicing for care homes?", "acceptedAnswer": { "@type": "Answer", "text": "Yes, TMV2 and TMV3 trained, annual servicing schedules with documented failsafe tests, hot/cold supply temperatures and outlet temperatures, suitable for CQC and HSE compliance evidence." } }, { "@type": "Question", "name": "Are you WRAS approved on fittings?", "acceptedAnswer": { "@type": "Answer", "text": "We exclusively use WRAS-approved fittings on commercial installs, and provide the fittings schedule with WRAS approval numbers on commissioning." } }, { "@type": "Question", "name": "Do you handle backflow / RPZ work?", "acceptedAnswer": { "@type": "Answer", "text": "Yes, including RPZ testing for Fluid Category 4 and 5 installations on the mandatory annual schedule." } }, { "@type": "Question", "name": "Can you cover ongoing maintenance?", "acceptedAnswer": { "@type": "Answer", "text": "Yes, planned preventive maintenance contracts available for offices, retail, restaurants, gyms and care homes, with priority breakdown response." } } ] }, { "@context": "https://schema.org", "@type": "BreadcrumbList", "itemListElement": [ { "@type": "ListItem", "position": 1, "name": "Home", "item": "https://heatriteplumbingandheating.co.uk/" }, { "@type": "ListItem", "position": 2, "name": "Services", "item": "https://heatriteplumbingandheating.co.uk/services" }, { "@type": "ListItem", "position": 3, "name": "Commercial Plumbing", "item": "https://heatriteplumbingandheating.co.uk/services/commercial-plumbing" } ] } ] --- St Albans Mon–Sat 8:00–17:30 · 24/7 Emergency · Gas Safe Registered [info@heatrite.uk](mailto:info@heatrite.uk)[07455 748635](tel:+447455748635)[07702 523464](tel:+447702523464)[07584 076105](tel:+447584076105) [![Heatrite Plumbing & Heating](/__l5e/assets-v1/6766d4f9-4594-4088-8ae7-80c8fa1d440c/heatrite-logo.png)](/) [About](/about) [Domestic](/services) [Commercial](/services) [Service Areas](/service-areas) [Our Work](/our-work)[Contact](/contact) [07455 748635](tel:+447455748635) [Request Estimate](/contact) Commercial · Plumbing · WRAS Compliant # Commercial Plumbing Built to Last & Compliant Mains pressure boosting, thermostatic mixing valves, backflow protection, Legionella-aware pipework and full plumbing fit-outs for offices, retail, restaurants, gyms and care homes, designed and installed to WRAS and BS 8558. [Request commercial plumbing quote](/contact) [07455 748635](tel:+447455748635)[07702 523464](tel:+447702523464) WRAS compliant · BS 8558 · L8 Legionella aware - WRAS approved fittings - BS 8558 design - L8 Legionella-aware pipework - TMV2 / TMV3 trained - Single point of accountability Service overview ## What commercial plumbing actually involves. Plain-English breakdown, so you know exactly what you're paying for, and why it matters before we set foot on site. ### What it is Commercial plumbing, design, install and ongoing maintenance. Mains pressure boosting, calorifiers and water heaters, hot/cold distribution, TMVs, backflow protection, accessible-WC fit-outs, kitchen and washroom plumbing and full strip-and-refit projects. ### Who it's for Facilities managers, fit-out contractors, building owners and tenants in offices, retail, restaurants, gyms, surgeries, care homes and light industrial sites needing reliable, compliant commercial plumbing. ### When you need it Office refurbishments and Cat A/B fit-outs, retail unit handovers, restaurant kitchen installs, gym/changing-room builds, accessible-WC additions, water heater replacements, mains pressure issues, low-flow complaints from tenants. ### Why it matters Commercial plumbing has a different rulebook to domestic, WRAS-approved fittings, BS 8558 design, ACoP L8 Legionella awareness, TMV2/3 valves on every basin in care/health settings. Domestic plumbers don't write the certificates a commercial occupier needs, and a non-compliant install becomes the building owner's liability the moment a tenant complaint reaches the Local Authority. The cost of doing nothing ## What goes wrong when this is ignored. Commercial plumbing failures don't just inconvenience users, they breach statutory duties and create insurance and HSE exposure that builds over time. ### Risks of waiting - Inadequate backflow protection lets contaminated water back-feed into the mains, a Water Supply (Water Fittings) Regulations 1999 breach and a reportable incident. - Dead-leg pipework and stagnant outlets are textbook Legionella growth sites, the ACoP L8 obligation lands squarely on the building duty holder. - Untested or wrong-grade TMVs in care and health settings expose users to scald risk and break CQC compliance. - Undersized incoming mains and missing pressure boosting cause low-flow complaints that escalate to lease disputes. ### Common mistakes - Using domestic-grade fittings on commercial installs, fails WRAS audit on day one. - Skipping backflow protection on washing machines, dishwashers, hose taps and chemical dispensers. - Ignoring dead-legs left behind after partition changes, the textbook Legionella risk. - Letting non-TMV-trained engineers fit or service mixing valves in healthcare or care settings. Our process ## How the job actually runs. Same system every time. No improvising on your floor. 1. 01 ### Survey & compliance check We walk the site with facilities or the fit-out lead, log incoming mains pressure, existing pipework condition, backflow categories and any Legionella risk points. 2. 02 ### Design & fixed quote Schematic, fittings schedule with WRAS approvals, TMV grades selected by use case, fixed written quote with phasing for live sites. 3. 03 ### Install or fit-out Mains upgrades, booster sets, hot/cold distribution, calorifiers, water heaters, TMVs, washrooms and kitchen plumbing, all WRAS approved fittings, all neat and labelled. 4. 04 ### Commissioning & testing Pressure tests, TMV failsafe tests, backflow device tests, system flushed and disinfected to BS 8558 where required, temperatures verified at outlets. 5. 05 ### Handover & maintenance Schematics, asset register, TMV service schedule, flushing regime and L8 risk notes handed over, with optional ongoing maintenance contract. What you get ## The outcomes that matter. ### Statutory compliance covered WRAS fittings, BS 8558 design, ACoP L8 awareness and TMV2/3 grades selected by use case, audit-ready paperwork. ### One contractor, all trades Plumbing, gas, drainage and water heater work under one Gas Safe commercial roof, no finger-pointing between subcontractors. ### Minimal disruption on live sites Phased work, out-of-hours and weekend availability, isolation strategies agreed in advance with facilities. ### Built for the duty cycle Commercial-grade valves, brass-bodied where required, pipework supported and labelled, designed to a 25+ year service life. ### Pressure problems solved Booster sets sized properly, branch sizing corrected, low-flow complaints from upper-floor tenants resolved. ### Maintenance built in Optional annual TMV servicing, L8 temperature checks and pipework inspections under a planned contract. In depth ## Everything worth knowing before you book. The details a salesperson skips. Skim it, or read every word, both are useful. Questions on this? Talk to a Gas Safe engineer direct. [07455 748635](tel:+447455748635) [07702 523464](tel:+447702523464) ### Mains pressure boosting Most multi-storey or multi-tenant commercial buildings outrun their incoming mains pressure long before the supply itself becomes the limit. A properly sized variable-speed booster set, with break tank, smooths flow under simultaneous demand, keeps top-floor outlets usable and protects appliances from cavitation. We size against actual peak demand, not nameplate capacity, and integrate with BMS for fault reporting. ### TMVs, getting the grade right Not every mixing valve is appropriate for every setting. TMV2 valves are commercial-grade for general use, TMV3 valves are healthcare-grade with tighter failsafe tolerances for care homes, hospitals and surgeries. We're TMV2/TMV3 trained, select the right valve per outlet based on use case, and provide an annual servicing schedule that satisfies CQC and HSE requirements. ### Backflow protection, the audit point most installs fail The Water Supply (Water Fittings) Regulations 1999 categorise every appliance by contamination risk (Fluid Categories 1–5) and require a matching backflow protection device. We assess every outlet on a commercial install, fit the right device (single check, double check, RPZ where required) and schedule the annual RPZ testing that's mandated for Cat 4+ installations. ### Legionella-aware pipework Dead-legs, stagnant outlets, low-use taps and incorrectly set water temperatures are the textbook conditions for Legionella growth. ACoP L8 puts the obligation on the building duty holder. We design pipework to minimise dead-legs, keep hot above 55°C and cold below 20°C at outlets where possible, and document the system so your L8 risk assessment has accurate information to work from. ### Cat A, Cat B and full fit-outs On office Cat A handovers we install the shell plumbing, mains, risers, water heater provision, and capped points for tenant fit-out. On Cat B we work to the tenant's layout, washrooms, kitchens, point-of-use water heaters and any specialist plumbing. We work to the fit-out programme, attend site meetings and hand over certificated on completion. General work gallery ## Recent Heatrite jobs that show the standard of our work. A broader look at recent installs, hot water systems, testing work and finished jobs across domestic and commercial sites. ![Commercial boiler internals during installation with exposed heat exchanger and neatly routed pipework](/__l5e/assets-v1/e9a65e47-b343-4aa3-933f-015200070c72/work-4.png) Commercial heating Installed and commissioned by Heatrite. ![Twin commercial boiler setup with both front panels removed for servicing and commissioning](/__l5e/assets-v1/38666ee2-c4d1-4fbb-a25e-ce786403957a/work-5.png) Commercial heating Installed and commissioned by Heatrite. ![Wall-mounted Vaillant boiler installation with insulated pipework and copper connections](/__l5e/assets-v1/456ba7b5-5c1c-4b00-b43e-404591d5ed03/work-6.png) Boiler installation Installed and commissioned by Heatrite. ![External oil tank installation positioned neatly between brick walls](/__l5e/assets-v1/4de611ea-cafe-4c20-86d6-42cd9aa3c1d4/work-7.png) Oil heating Installed and commissioned by Heatrite. ![Baxi unvented hot water cylinder fitted in a compact airing cupboard with copper pipework](/__l5e/assets-v1/a0cb8061-dd27-4f69-b39e-1aad4c311c0a/work-8.png) Unvented cylinders Installed and commissioned by Heatrite. ![Multiple Stelrad hot water cylinders installed with expansion vessels and tidy copper distribution pipework](/__l5e/assets-v1/dbe03410-435b-401c-8d93-526e266960c5/work-9.png) Hot water systems Installed and commissioned by Heatrite. ![Outdoor Vaillant boiler cabinet installation with exposed copper pipework and balanced flue](/__l5e/assets-v1/a10b18c8-f27f-4f0a-9a8a-b248c5575dbd/work-10.png) Boiler installation Installed and commissioned by Heatrite. ![Commercial gas purge and flame testing setup outside a brick building](/__l5e/assets-v1/ed3a08a3-1f93-4247-950b-4507cae5d7ba/work-11.png) Gas testing Installed and commissioned by Heatrite. ![Finished cloakroom installation with herringbone wall tiles and wall-hung toilet](/__l5e/assets-v1/f5382f0a-f6f6-42a0-8ba6-3eb4e0e9eba4/work-12.png) Bathroom installation Installed and commissioned by Heatrite. ![Unvented hot water cylinder installation with neat copper pipework routed in a compact cupboard](/__l5e/assets-v1/5966169f-df43-4e6a-8fa4-00d5ada11b89/work-13.png) Unvented cylinders Installed and commissioned by Heatrite. ![Freestanding bath installation with illuminated wall niches in a finished bathroom](/__l5e/assets-v1/7557adb8-2be1-4859-8ce8-0547c095a975/work-14.png) Bathroom installation Installed and commissioned by Heatrite. ![New Vaillant boiler installation with exposed copper pipework and clean wall finish](/__l5e/assets-v1/17bc8561-367c-453d-9309-b51b22eceeba/work-15.png) Boiler installation Installed and commissioned by Heatrite. ![Commercial plant room with multiple large heating units and insulated pipework](/__l5e/assets-v1/22d33404-7c84-47d9-addc-12e0414b4ced/work-16.png) Commercial heating Installed and commissioned by Heatrite. ![Vaillant boiler installation in a service cupboard with diagnostic equipment attached](/__l5e/assets-v1/8ac0bcb5-ca6c-4391-a20e-46ac8c7b7e77/work-17.png) Boiler installation Installed and commissioned by Heatrite. ![Commercial heating installation with multiple wall-mounted units and copper distribution pipework](/__l5e/assets-v1/95c4e5ee-245f-47ab-b9b6-0280e97b475f/work-18.png) Commercial heating Installed and commissioned by Heatrite. ![Vaillant boiler fitted in a utility room with tidy vertical pipework connections](/__l5e/assets-v1/e2b0e0f3-7593-4c3b-87ef-e6be613fc4a9/work-19.png) Boiler installation Installed and commissioned by Heatrite. ![Hot water cylinder and underfloor heating manifold installation with twin circulating pumps](/__l5e/assets-v1/9a157181-7e9a-48de-a918-dbb3064b22e7/work-20.png) Hot water systems Installed and commissioned by Heatrite. ![Pressurised hot water cylinder installation with expansion vessels and control components](/__l5e/assets-v1/ba83dadf-8018-41e5-9bce-095350912213/work-21.png) Hot water systems Installed and commissioned by Heatrite. ![External heating unit installed neatly beside a brick wall with isolated service connections](/__l5e/assets-v1/56b5860d-136e-437a-bef1-70bbcf99ea4d/work-22.png) Oil heating Installed and commissioned by Heatrite. ![Tall unvented hot water cylinder installation fitted neatly into bespoke white cabinetry with copper pipework](/__l5e/assets-v1/9118dd23-8319-41e4-a6b7-f6a03823c75c/work-23.png) Unvented cylinders Installed and commissioned by Heatrite. ![Vaillant boiler fitted inside a tall cupboard with concealed services and tidy copper pipework](/__l5e/assets-v1/60230cd2-2c07-4803-a0a2-562033083e2c/work-24.png) Boiler installation Installed and commissioned by Heatrite. ![Stainless hot water cylinder installation in a storage room with neatly routed copper connections](/__l5e/assets-v1/ffa01736-335e-4410-a061-4e8e648d54a9/work-25.png) Unvented cylinders Installed and commissioned by Heatrite. ![Commercial cascade boiler installation with twin wall-mounted units and extensive plant room pipework](/__l5e/assets-v1/1f759664-50e1-4b96-a2ae-ea8b1e996c37/work-26.png) Commercial heating Installed and commissioned by Heatrite. ![Large commercial calorifier installation in a plant room with insulated pipework and control panel](/__l5e/assets-v1/1bfb9470-99ee-49ba-9b20-0afd0485b069/work-27.png) Commercial heating Installed and commissioned by Heatrite. ![Blue pressurised vessel positioned in a basement plant room during hot water system upgrade works](/__l5e/assets-v1/2c721001-b5ca-492e-ba58-f325618b5709/work-28.png) Hot water systems Installed and commissioned by Heatrite. ![Plant room expansion vessel and Vaillant boiler installation with insulated services and pressure gauge](/__l5e/assets-v1/cb4d1710-6f69-4b17-b976-4188487760c2/work-29.png) Commercial heating Installed and commissioned by Heatrite. Previous slide Next slide Frequently asked ## Straight answers, no fluff. Can't see your question? Call [07455 748635](tel:+447455748635) or [07702 523464](tel:+447702523464). Do you work on Cat A and Cat B fit-outs? Yes, regularly. Cat A shell plumbing on handover and full Cat B tenant fit-outs, working to the fit-out contractor's programme and attending coordination meetings as required. Can you handle live sites with minimum disruption? Do you do TMV servicing for care homes? Are you WRAS approved on fittings? Do you handle backflow / RPZ work? Can you cover ongoing maintenance? Payment & finance ## Card, Klarna or Clearpay, pay the way that suits you. Boilers, bathrooms and larger installs can be spread over time with Klarna or Clearpay finance, just ask when you book. ### Card payments on site We carry a card machine in the van, tap, chip & PIN or contactless on completion. ### Klarna Spread the cost of your boiler or bathroom install with flexible Klarna finance options. ### Clearpay Pay over time with Clearpay, ideal for boilers, cylinders and full bathroom fits. Ready when you are ## Book your commercial plumbing job today. Written fixed quote. Gas Safe engineer. No upsell, no pressure. [Request commercial plumbing quote](/contact) [07455 748635](tel:+447455748635) [07702 523464](tel:+447702523464) Gas Safe registered 24/7 cover 5-star rated locally Related services ## Other things we look after. [← Back to homepage](/) [ ![Gas Safe engineer installing a wall-mounted combi boiler](/assets/boilers-Dz3GzZ9b.jpg) ### Boilers Learn more ](/services/boilers)[ ![Engineer power flushing a central heating system](/assets/power-flushing-DGUFOFm0.jpg) ### Power Flushing Learn more ](/services/power-flushing)[ ![Modern bathroom installation with walk-in shower and brushed brass fittings](/assets/bathroom-installations-WIyfjKRg.jpg) ### Bathroom Installations Learn more ](/services/bathroom-installations)[ ![Plumber fitting a chrome kitchen tap with copper pipework](/assets/plumbing-DmY4tKrz.jpg) ### Plumbing Learn more ](/services/plumbing) ![Heatrite Plumbing & Heating](/__l5e/assets-v1/6766d4f9-4594-4088-8ae7-80c8fa1d440c/heatrite-logo.png) Gas Safe heating & plumbing specialists based in London Colney, St Albans, serving homes and commercial properties across Hertfordshire & the Home Counties. Mon–Sat 8:00–17:30, with 24/7 emergency response. 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