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.
Pressure Reducing Valves in North 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 Barnet and Enfield run high mains pressure, so this is more common than people expect.
Why choose Norvex 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
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.
Why choose Norvex
Gas Safe Registered
Every engineer registered & ID-checked
Manufacturer Accredited
Worcester, Vaillant, Ideal & more
Same-week Appointments
Most jobs booked within 48 hours
5★ Reviewed
Hundreds of verified reviews
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 North London do you cover for pressure reducing valves?
We provide pressure reducing valves across the whole of North London, including Barnet, Finchley, Muswell Hill, Hampstead, Highgate, Enfield and the surrounding N, NW and EN postcodes. Local engineers means short call-out times wherever you are.
What our customers say
"Quoted, fitted and gone in a day. New boiler, no fuss, new smart thermostat thrown in. Best tradespeople we've had in years."
Sarah, Barnet
"Emergency call at 9pm — engineer on site by 10:30. Sorted the leak that night. Highly recommend."
Michael, Finchley
"Total bathroom renovation. Beautiful job, on budget, finished early. We'll be using Norvex for the kitchen next."
Priya, Highgate
Ready when you are
Book pressure reducing valves with a Gas Safe engineer — fixed pricing, same-week appointments.
Book pressure reducing valves today
Free quotes, fixed pricing and Gas Safe engineers across Barnet, Finchley, Muswell Hill, Hampstead and the rest of North London.