Check Valves London | LPCB LPS 1090/BS EN 12334/FM/UL | Valve-Atlas

Check Valves London: UL 312 Listed and FM 1210 Approved Silent-Closure, Swing Check and Spring-Loaded Check Valves for ADB 2019, BS 9990, BS EN 12845 Section 7 and BS EN 12334 Fire Pump Discharge, Backflow Prevention and Sprinkler Water Supply

ValveAtlas supplies UL 312 Listed, FM Class 1210 Approved and BS EN 12334, LPCB LPS 1090 check valves including silent-closure non-slam, swing check, spring-loaded wafer, double-disc and grooved-end configurations to fire protection contractors, mechanical consultants and general contractors across London, Greater London, Manchester, Birmingham, Leeds, Glasgow, Edinburgh, Bristol and the Thames Valley. Metro delivery, factory-coated ductile-iron bodies, stainless steel springs and EPDM resilient seats for UK winter with Scotland and Northern England severe weather service and ADB and BS EN 12845 submittal packages for LFB.

This page is the technical reference for London specifying engineers, sprinkler contractors, mechanical installers and civil underground contractors selecting check valve packages for Heathrow (LHR), Gatwick (LGW), Stansted (STN) and Luton (LTN) fire mains, Royal London, Guy’s and St Thomas’, King’s College, University College London Hospitals (UCLH), St Mary’s, Chelsea and Westminster campus loops, University of London (UCL, KCL, Imperial, LSE, Queen Mary, Royal Holloway), Oxford and Cambridge campuses, Equinix LD1-LD11 Slough and London, Digital Realty Crossways and Chessington, Interxion LON1-LON3 and Virtus data centers and any BS EN 12845 Section 16.8 or NFPA 20 Chapter 4.16 fire pump discharge and backflow prevention application, governed by Building Regulations Approved Document B (ADB) 2019, BS 9990, BS 9999 and BS EN 12845 Section 7, BS EN 12334, LPCB LPS 1090.

Check valve range for London fire protection projects

Type	UNIVAL SKU	Size	Max working pressure	Listings	Typical London application
Silent-closure non-slam	UVC-NR-4F	4 inch / DN100 flanged	175 psi	UL 312, FM 1210	Fire pump discharge per NFPA 20 Chapter 4.16, water hammer control
Silent-closure non-slam	UVC-NR-6F	6 inch / DN150 flanged	250 psi	UL 312, FM 1210	Fire pump discharge and sprinkler incoming main
Silent-closure non-slam	UVC-NR-8F	8 inch / DN200 flanged	250 psi	UL 312, FM 1210	Horizontal split-case fire pump discharge
Swing check	UVC-SW-6F	6 inch / DN150 flanged	175 psi	UL 312, FM 1210	Sprinkler water supply, standpipe isolation check
Swing check with lever and weight	UVC-SW-8F-LW	8 inch / DN200 flanged	175 psi	UL 312, FM 1210	Horizontal fire service main with ball drip
Spring-loaded wafer	UVC-WAFER-4	4 inch wafer	300 psi	UL 312, FM 1210	Compact installation between flanges, grooved piping
Double-disc wafer	UVC-DBL-6	6 inch wafer	300 psi	UL 312, FM 1210	Low-headloss high-flow fire pump discharge
High-pressure silent	UVC-NR-6F-HP	6 inch flanged	300 psi	UL 312, FM 1210	High-rise standpipe lower zone, fire pump high-pressure
Grooved-end silent	UVC-NR-6G	6 inch grooved	300 psi	UL 312, FM 1210	Grooved fire pump discharge, hospital and data center

Why London contractors choose ValveAtlas check valves

UL 312 and FM 1210 dual listing for LFB acceptance. Every UNIVAL check valve is UL 312 Listed (check valves for fire-protection service) and FM Class 1210 Approved. LFB accepts listed check valves with factory submittal, ADB and BS EN 12845 compliance letter and BS EN 12845 Section 16.8 sprinkler water supply documentation.

Silent-closure non-slam for fire pump discharge. NFPA 20 Chapter 4.16 requires listed check valve on fire pump discharge. UVC-NR silent-closure design uses spring-assisted center-guided disc to close before flow reversal, eliminating water hammer, pipe shock and column separation damage that plagues swing check valves on pump shutdown. Critical for London fire pump rooms with long discharge runs.

Swing check for sprinkler incoming main. UVC-SW-4F through UVC-SW-10F flanged swing check valves with bronze or stainless disc, ductile iron body and renewable resilient seat. UL 312 Listed for sprinkler water supply, standpipe isolation check and hose valve riser check per NFPA 13 Section 16.8.

Spring-loaded wafer for compact installation. UVC-WAFER-4 through UVC-WAFER-8 wafer-body spring-loaded check valves installed between ANSI Class 125/250 flanges with no external bolting. Ideal for London mechanical rooms with limited space between pump discharge flange and downstream gate valve.

Double-disc for low-headloss high-flow. UVC-DBL-4 through UVC-DBL-10 double-disc (duo-check) wafer valves with spring-loaded twin discs provide lowest headloss and fastest closure for high-flow fire pump discharge service. UL 312 Listed and FM Class 1210 Approved equivalent to APCO CVS-6000 and Val-Matic Dual Disc.

Ductile iron body with fusion-bonded epoxy. UVC bodies are ductile iron ASTM A536 Grade 65-45-12 with factory-applied fusion-bonded epoxy coating per AWWA C550, rated for indoor dry-sidewall mount and wet pipe service. Stainless steel spring and shaft, EPDM or buna-N resilient seat and bronze seating surface rated for 16 bar / 17 bar / 21 bar (232 psi / 250 psi / 300 psi) PN16/PN17/PN21 working pressure.

Direct substitution for AVK, Patterson, Crane and Hattersley. UNIVAL UVC-NR, UVC-SW and UVC-WAFER are UL 312/FM 1210 listed equivalent to AVK Series 53/35, Patterson Pacific UK check valve, Crane Fluid Systems swing and silent check, Hattersley (Crane) silent check and Pegler Yorkshire check. LFB accepts listed equivalent substitutions with engineer-of-record approval and factory submittal package.

Code and listing acceptance for London

Building Regulations Approved Document B (ADB) 2019, BS 9990, BS 9999. Building Regulations Approved Document B (ADB) 2019, BS 9990, BS 9999 references BS EN 12845 and BS EN 12845 Section 7, BS EN 12334, LPCB LPS 1090 for fire sprinkler and fire pump check valves. Check valve selection must satisfy Section 903.3.5 sprinkler water supply and Section 913 fire pump installation. UVC UNIVAL ships ADB and BS EN 12845 compliant.

NFPA 13 Section 16.8 sprinkler water supply check. NFPA 13 Section 16.8 requires listed check valve on sprinkler water supply connection to prevent backflow into public water main. UVC-SW and UVC-NR series satisfy this requirement. Section 16.8.2 specifies check valve plus listed indicating control valve configuration.

NFPA 20 Chapter 4.16 fire pump discharge. NFPA 20 Chapter 4.16 requires listed check valve on fire pump discharge between pump and discharge gate valve. Silent-closure non-slam check preferred for water hammer control. UVC-NR-4F through UVC-NR-10F satisfy NFPA 20 discharge check valve requirement in all London fire pump room installations.

Backflow prevention for potable water protection. Where sprinkler system connects to potable water main, double check valve assembly or reduced-pressure zone (RPZ) backflow preventer required per local water authority. UVC check valve series provides base check valve; RPZ/DCVA assemblies available as separate line item.

LFB acceptance. London Fire Brigade (LFB) and UK insurers (RSA, Aviva, Zurich, Allianz, AXA) inspection references Building Regulations Approved Document B (ADB) 2019, BS 9990, BS 9999, BS EN 12845 Section 7, BS EN 12334, LPCB LPS 1090 and manufacturer listing. Factory submittal with UL/FM/ULC certificates, functional test per NFPA 25 Chapter 13 and hydrostatic test per AWWA C508 required for sign-off.

AVK, Patterson, Crane and Hattersley substitution for London projects

Mueller A-2061 and A-2062 swing check. Substitute UVC-SW-4F, UVC-SW-6F or UVC-SW-8F at matching size and flange drilling (ANSI B16.1 Class 125/250). Same UL 312/FM 1210 listing, ductile iron body with fusion-bonded epoxy, bronze or stainless disc. London standard brand substitution with factory submittal package.

Clow F-1100 flanged swing check. Substitute UVC-SW-6F or UVC-SW-8F at matching duty. Same swing check construction with ductile iron body, renewable resilient seat and AWWA C508 compliance for buried or indoor fire service.

Kennedy 1500 silent check. Substitute UVC-NR-4F, UVC-NR-6F or UVC-NR-8F silent-closure non-slam at matching size and pressure rating. Same spring-assisted center-guided design for fire pump discharge water hammer control.

M&H Style 259 swing check. Substitute UVC-SW-6F or UVC-SW-8F at matching pressure class. Same AWWA C508 compliance and bronze or stainless disc for fire service main check.

APCO CVS-6000 double-disc. Substitute UVC-DBL-4, UVC-DBL-6 or UVC-DBL-8 at matching wafer dimension. Same low-headloss double-disc (duo-check) construction with UL 312/FM 1210 listing.

AVK Series 53/35 resilient seated check. Substitute UVC-SW or UVC-NR at matching configuration. Matching EPDM resilient seat, ductile iron body and UL/FM listing.

Installation scenarios for London check valves

Heathrow (LHR), Gatwick (LGW), Stansted (STN) and Luton (LTN) fire pump rooms and fire mains. Airport fire pump discharge with UVC-NR-8F silent-closure on horizontal split-case pumps, UVC-NR-6F on end-suction pumps and UVC-SW-8F-LW on fire service main with ball drip. Water hammer protection critical for long airside piping runs to terminals and cargo ramps.

Royal London, Guy’s and St Thomas’, King’s College, University College London Hospitals (UCLH), St Mary’s, Chelsea and Westminster campus fire pump and sprinkler. London hospital campus fire pump rooms with UVC-NR-6F and UVC-NR-8F silent-closure discharge check, UVC-SW-6F sprinkler incoming main check and UVC-WAFER-4 compact installation at pre-action panel bypass. Redundant fire pump rooms per NFPA 20 Chapter 11.

University of London (UCL, KCL, Imperial, LSE, Queen Mary, Royal Holloway), Oxford and Cambridge campus standpipe and sprinkler. University building standpipe check valves with UVC-SW-6F and UVC-SW-8F at incoming main, UVC-NR-4F silent-closure at local fire pump discharge for high-rise research buildings and lab facilities. LFB acceptance with factory submittal.

Equinix LD1-LD11 Slough and London, Digital Realty Crossways and Chessington, Interxion LON1-LON3 and Virtus data center fire pump and pre-action. Data center fire pump discharge with UVC-NR-6F silent-closure non-slam for zero water hammer on pump trip, UVC-DBL-6 double-disc for lowest headloss on high-flow systems and UVC-WAFER-4 at pre-action riser manifold. Tamper-supervised indicating valves upstream and downstream.

High-rise standpipe and sprinkler. London high-rise standpipe zone check valves with UVC-NR-6F-HP 300 psi at lower zones and UVC-SW-6F 175 psi at upper zones. NFPA 14 Chapter 6 compliant with backflow prevention on interconnections between pressure zones.

Related products for complete London fire protection valve package

Gate valves. UVG-OSY OS&Y rising stem gate valves upstream and downstream of check valve per NFPA 20. See Gate Valves London.

Butterfly valves. UVB-G310 grooved butterfly with integral tamper as indicating control valve alternative. See Butterfly Valves London.

Fire pumps. UVFP-HSC, UVFP-ES and UVFP-VIL fire pumps with silent-closure check valve discharge per NFPA 20. See Fire Pumps London.

Hydrants. UVH-5BR wet-barrel and UVH-3DRY dry-barrel hydrants with integral bronze check disc and drain. See Hydrants London.

Frequently asked questions (London)

Is UNIVAL accepted by LFB? Yes. UNIVAL check valves are UL 312 Listed and FM 1210 Approved. LFB accepts listed check valves with factory submittal, ADB and BS EN 12845 compliance letter and BS EN 12845 Section 16.8 documentation.

Silent-closure vs swing check on fire pump discharge? NFPA 20 accepts both listed silent-closure and swing check on fire pump discharge. Silent-closure UVC-NR eliminates slam and water hammer on pump trip; swing check UVC-SW is lower cost and preferred on low-velocity sprinkler incoming mains. For London fire pump rooms with long discharge piping or variable-speed drive (VSD), silent-closure is strongly recommended.

What causes check valve slam? Swing check valves close when flow reverses. On fast pump shutdown, flow reverses rapidly; disc slams shut, generating water hammer shock wave that can rupture piping. Silent-closure UVC-NR uses spring and center-guide to close disc before flow reverses, eliminating slam.

Do I need check valve upstream and downstream of fire pump? NFPA 20 Chapter 4.16 requires check valve on discharge side only. Suction side has listed OS&Y gate valve (UVG-OSY). Check valve on suction is not permitted; suction must be flooded with positive pressure per NFPA 20.

Spring-loaded wafer vs flanged swing check? Wafer UVC-WAFER-4 and UVC-DBL-4 install between flanges with no external bolting, ideal for tight spaces. Flanged swing UVC-SW-6F has full flange connections with standard face-to-face dimensions. Choose wafer for compact pump rooms; flanged for standard service.

What is the delivery time to London? Stock UVC-NR-4F, UVC-NR-6F and UVC-SW-6F ship 1 to 2 weeks. UVC-WAFER and UVC-DBL wafer stock 2 to 3 weeks. UVC-NR-HP 300 psi high-pressure factory-built ships 3 to 4 weeks. Metro freight from Toronto HQ 2 to 3 business days.

How do I substitute AVK, Patterson, Crane and Hattersley on a London project? Submit substitution letter with UNIVAL UL 312/FM 1210 certificates, factory submittal drawing and BS EN 12845 Section 16.8 compliance. Engineer-of-record approval follows; LFB accepts listed equivalent substitutions.

Contact ValveAtlas for London check valve quotation

For check valve quotations, AVK Series 53/35, Patterson Pacific UK check valve, Crane Fluid Systems swing and silent check, Hattersley (Crane) silent check and Pegler Yorkshire check substitution submittals for LFB approval, or NFPA 13/14/20 check valve packages with silent-closure non-slam protection for Heathrow (LHR), Gatwick (LGW), Stansted (STN) and Luton (LTN) airside, London hospital campus, university campus, data center or high-rise standpipe projects, email the project mechanical drawings, pipe size, pressure class and fire pump curve to burakpadr@gmail.com or use the contact form. Same-day response on London urgent orders.