14 Rivera Drive, Southend-on-Sea SS1 2RBinfo@avanzaheatingandcooling.co.uk Open 24/7Company No. 17201187 About Heating & Cooling Bathrooms Areas Contact 01702 967120Request Quote - Home - Services - Heating & Plumbing Heating & Plumbing · Essex # Heating & PlumbingDone ProperlyAcross Essex. Full heating systems, radiator upgrades, pipework re-runs, hot-water cylinders, mains pressure work and general plumbing. Same team handling design, install and commission — Gas Safe registered, fully insured. Request Free Quote 01702 967120 15+ years on the tools · Gas Safe registered · Open 24/7 · Same-Day Service Open 24/7 · Same-Day Service Gas Safe Registered Free Quote · Price Fixed 14 Days Fully Insured 1-Year Workmanship Guarantee Service Overview ## Heating & Plumbing — What, Who, When & Why. Owner-led by Pierre Codarin from Southend-on-Sea. Single point of contact from first call to final invoice. What it is Avanza's heating and plumbing service covers anything that carries water or gas in your home: full system designs, radiator swaps and upgrades, unvented hot-water cylinder installs, mains pressure work, pipework re-runs, leak repairs, soil-stack work, and general domestic plumbing. Who it's for Homeowners with cold radiators, weak hot-water pressure, noisy pipes, leaky valves, or a heating system that no longer matches the house. Also landlords and letting agents needing pre-tenancy plumbing sign-offs. When you need it If your system bangs, knocks, drips, runs cold, or simply hasn't been touched in 15+ years, you're paying for it in gas bills and you're one valve failure away from a flood. Most clients act after a near-miss. Why hire a professional Heating and plumbing problems compound. A tiny leak today is a ceiling collapse next year. A radiator that won't balance today is a dead pump and a major callout next winter. Sorting it properly costs less than reacting to the cascade. The Real Cost Of Getting This Wrong ## What Happens If You Ignore It, Delay It, Or Hire The Wrong Person. Heating and plumbing is the one area of the house where 'leave it until it breaks' is the most expensive strategy possible. ### If It's Ignored — The Damage Cascade - A weeping radiator valve drips 2 litres a week into the floor — wet rot in joists within 18 months, ceiling collapse possible within 3 years. - An unbalanced heating system runs the pump 24/7 trying to push heat through one cold radiator — wasted electricity, plus pump failure years early. - Failing thermostatic radiator valves stick open, overheating bedrooms and wasting gas every winter. - A poorly-fitted unvented cylinder without proper expansion vessel sizing can rupture — these are pressure vessels, not loose-fit upgrades. ### Common Mistakes We're Asked To Fix - Using PTFE tape on threaded joints instead of jointing compound — the joints weep within 2 years. - Letting a non-G3-qualified installer fit an unvented cylinder. This is illegal and dangerous. - Fitting cheap valves on a system you'll never reach again under a tiled floor. - Skipping a magnetic filter when upgrading a boiler — sludge then destroys the new heat exchanger. Our Process ## A System That Gets Built To Specification — Not To A Mood. - 01 ### Survey & Diagnose On-site inspection, system pressure, flow rate, hot-water demand, gas pipe sizing — we find the actual problem, not the obvious one. - 02 ### Fixed Written Quote Itemised quote within 48 hours covering parts, labour and any incidentals. Lock-in price. - 03 ### Install / Repair Work carried out cleanly, drop-sheets and protection laid, mains isolated only when needed, hot water restored same day where possible. - 04 ### Test & Balance Full system flush where indicated, all radiators balanced room-by-room, hot-water flow tested at every outlet. - 05 ### Certify & Hand Over Gas Safe certificate where applicable, G3 cert on cylinder installs, written workmanship guarantee, all paperwork emailed. Benefits ## Concrete, Specific, Measurable. No Vague Promises. ### One Team, One Trade Number Same person designs, installs and commissions — no information lost in translation. ### Gas Safe & G3 Qualified Legally cleared to work on gas, on unvented cylinders, and on the full scope of domestic systems. ### Same-Day Leak Response Active leaks treated as emergencies — on site same-day, often within 2–4 hours. ### Fixed Written Pricing No clock-watching hourly rates. Itemised quote, locked-in number. ### Magnetic Filter Standard Every system we touch leaves with a magnetic filter fitted — protects the boiler and extends life. ### 12-Month Workmanship Guarantee Written guarantee on every job, in addition to manufacturer warranties on parts. Inside The Detail ## The Materials, Methods & Variations That Decide The Outcome. These are the details cheaper installers skip — and the reason their work fails inside two years. Working across Southend-on-Sea · Chelmsford · Basildon · Colchester · Brentwood · Rayleigh · Wickford · Billericay · Harlow Full Service Area List ### Radiator Upgrades & Balancing We upgrade tired pressed-steel radiators to higher-output convectors (Stelrad K2/K3), designer flat-panel rads (Bisque, Reina) or vertical column rads for taller walls. Every install includes new TRVs, lock-shields, and a full system balance — measuring flow temperature drop across each rad and adjusting until the system runs evenly. Old systems often gain 1–2°C across the house with no new boiler, just proper balancing. ### Unvented Hot-Water Cylinders Megaflo, Telford, Heatrae Sadia, Joule — we install and service unvented (mains-pressure) cylinders. These require G3 certification (a separate qualification on top of Gas Safe). Every install includes correctly-sized expansion vessel, balanced cold supply, tundish, temperature & pressure relief valve, and an annual service prompt to keep the warranty live. Cylinders sized to bathroom count and household flow demand. ### Mains Pressure & Cold-Water Work Weak shower pressure, slow-filling baths and inconsistent hot water are almost always cold-side problems — undersized mains pipe, blocked stop-tap, or pressure-reducing valves set wrong. We measure dynamic pressure at the outlet, identify the bottleneck, and either upgrade the mains supply (often 15mm to 22mm or 25mm MDPE) or fit a pump where mains uplift isn't possible. ### Pipework: Copper, Plastic & MLCP Copper remains the gold standard for first-fix on heating and gas — soldered, joint-tested, recyclable. Plastic push-fit (Speedfit, Hep2O) is appropriate for second-fix and tight spaces but only when properly inserted and grip-tested. MLCP (multi-layer composite) is our standard for UFH manifolds. We don't mix plastic and copper carelessly; every joint is rated for the pressure and temperature it will see. Questions ## StraightAnswers. Cost, timeline, guarantees, lifespan, emergency cover — answered without the sales speak. Ask Yours ### How much does a radiator upgrade cost? +Radiator and re-pipe work is always priced from a free on-site survey — we don't list 'per-rad' prices because the right number depends on access, pipework condition and the rads you want. You'll receive a fixed written quote, with the price locked in for 14 days. ### Do you install unvented hot-water cylinders? +Yes — G3 qualified, fully certified, with the correct expansion vessel, tundish and discharge pipework. Megaflo, Telford and Joule installs done regularly. ### Can you fix weak shower pressure? +Yes — almost always. We measure dynamic pressure, identify the bottleneck (usually undersized pipework or a faulty PRV), and quote a fix in writing. Pumps are a last resort, not a first answer. ### Do you handle emergency leaks? +Yes — leaks treated as emergencies, on site same-day, often within 2–4 hours. See our Emergency Plumbing service for full details. ### Is my heating system worth upgrading or should I just replace the boiler? +Often the system itself (radiators, pipework, controls) is the bottleneck, not the boiler. We survey the whole system before recommending — sometimes a power-flush, magnetic filter and TRV upgrade transforms performance for a fraction of the cost of a new boiler. ### Will the work be guaranteed? +12 months on our workmanship in writing, plus full manufacturer warranties on parts (typically 5–10 years on quality valves, 25 years on copper pipework, 10–15 years on cylinders). ### Do you cover my postcode in Essex? +Yes — we work across Southend-on-Sea, Chelmsford, Basildon, Colchester, Brentwood, Rayleigh, Wickford, Billericay and Harlow. If you're outside that ring, call 07809 414913 and we'll confirm coverage before you spend a minute filling in a form. ### Are you Gas Safe registered and fully insured? +Yes. Gas Safe registered for all gas work, fully insured, and trading as Avanza Heating & Bathrooms Ltd (Companies House 17201187). Gas Safe is our only listed accreditation. Certificates and policy numbers available on request before any work starts. Related Services ## Often Booked Alongside Heating & Plumbing. ### Boiler Installation & Servicing Gas Safe boiler installs, swaps, repairs and annual servicing. View Service ### Underfloor Heating Wet and electric underfloor systems, designed and installed. View Service ### Emergency Plumbing Leaks, bursts, no heat, no hot water — rapid response across Essex. View Service Back to HomepageAll ServicesAll Service AreasContact Next Step ## Get The Heating & Plumbing Sorted — Properly, Once. Fixed written quote, Gas Safe and G3 certified, 12-month workmanship guarantee. Request Free Quote 01702 967120 Gas Safe registered · Fully insured · 1-year workmanship guarantee · Companies House 17201187 · Southend-on-Sea Premium bathrooms, heating and plumbing across Essex. Owner-led, Gas Safe registered, same-day service guaranteed. 01702 967120info@avanzaheatingandcooling.co.uk14 Rivera Drive, Southend-on-Sea, SS1 2RB Explore - About - Heating & Cooling - Bathrooms - Areas - Contact Services - Heating & Plumbing - Boiler Installation & Servicing - Emergency Plumbing - Underfloor Heating - Landlord Gas Safety Certificates - Luxury Bathrooms Service Areas - Southend-on-Sea - Chelmsford - Basildon - Colchester - Brentwood - Rayleigh - Wickford - Billericay - Harlow © 2026 Avanza Heating & Bathrooms Ltd. Company No. 17201187. All rights reserved. Privacy PolicyTerms & ConditionsOpen 24/7 · Emergency call-outs · Call by 12pm, engineer with you by 4pm Call NowRequest Quote