Pressure Reducing Valves
Pressure Reducing Valves
Excessive mains pressure causes banging pipes, dripping outlets and premature appliance failure. A pressure reducing valve brings it back into a safe range.
About this service
Pressure Reducing Valves in South West London, done properly the first time
We test your incoming static and dynamic pressure, then fit a pressure reducing valve set to a level that protects cylinders, boilers and appliances while keeping showers and taps performing well.
We also replace failed PRVs — a common cause of an unvented cylinder discharging to the tundish — and fit expansion vessels and mini-expansion units where they're missing. Parts of Kingston upon Thames and Fulham run high mains pressure, so this is more common than people expect.
Why Maxfix
Why choose Maxfix for pressure reducing valves
Premium workmanship, fixed pricing and a service experience built around you.
Static and dynamic pressure tested first
Valve set correctly, not just fitted
Cures banging pipes and water hammer
Protects unvented cylinders and appliances
Expansion vessels supplied where needed
How it works
A calm, four-step process
From the first call to a tidy handover — no surprises, no jargon, no mess.
Get in touch
Call us or send a quick enquiry — we'll respond within an hour during working hours.
Free survey & quote
An engineer assesses the work and gives you a clear, written, fixed-price quote.
Book a date that suits you
Choose a slot that fits around your schedule — we work evenings and weekends.
Work completed cleanly
Uniformed engineers carry out the work, tidy up fully and walk you through everything before leaving.
Get a fast quote for pressure reducing valves
Free, no-obligation quotes. Most calls answered within 30 seconds.
Trusted experts
Why choose Maxfix
Gas Safe Registered
Every engineer registered & ID-checked
Manufacturer Accredited [to be confirmed]
[accreditations to be confirmed]
Open 24 Hours, Every Day
Call any time — including nights and weekends
Fixed Price, Always
Agreed before we start — no hourly creep
Frequently asked
Your questions, answered
Why are my pipes banging?
Water hammer from high pressure or a fast-closing valve. A PRV, and sometimes an arrestor, solves it.
What pressure should my mains be?
Around 3 bar suits most homes. Much above that stresses fittings, cylinders and appliance hoses.
Will reducing pressure spoil my shower?
No — set correctly you keep good flow while removing the damaging peaks. We test performance before we leave.
Why is my unvented cylinder dripping at the tundish?
Often a failed PRV or expansion vessel. We diagnose which and correct it.
Which areas of South West London do you cover for pressure reducing valves?
We provide pressure reducing valves across the whole of South West London, including Kingston upon Thames, Richmond, Wimbledon, Twickenham, Surbiton, Fulham, Putney, Teddington, New Malden, Molesey, Hounslow, Brentford, Isleworth, Long Ditton, Worcester Park, Roehampton, Raynes Park, Morden, Petersham, Motspur Park and the surrounding KT, TW and SW postcodes. Local engineers means short call-out times wherever you are.
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Ready when you are
Book pressure reducing valves with a Gas Safe engineer — fixed pricing, open 24 hours.
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Book pressure reducing valves today
Free quotes, fixed pricing and Gas Safe engineers across Kingston upon Thames, Richmond, Wimbledon, Twickenham and the rest of South West London.