Accessible switches and sockets, 516
Acidity in water, 21
ACPO alarm policy, 637
Activated carbon filter, 256
Active infra-red detector, 639, 644
Adiabatic humidification, 296
Aerobic bacteria, 348
Air admittance valve, 319
Air changes per hour, 189, 237–238, 241, 263, 299
Air compressor, 63
Air curtain/door, 260
Air eliminator, 147
Air flow
Air infiltration, 236
Air mixing, 298
mixing unit, 281
Air permeability, 298
Air processing/handling unit, 275–276, 297
Air, as refrigerant, 285
Air source heat pumps, 306
Air test
on drains, 342
on sanitary pipework, 429
Alarm gong, sprinklers, 597–598
Alarm installations, 637
Alarm switches and sensors, 639
Alarm systems, 619–622, 639–646
Alkalinity in water, 21
Alternate wet and dry sprinkler system, 595, 598
Ammonia, 285
Anaerobic bacteria, 346
Annular duct flue system, 477
Anodic protection, 132
Anti-siphon device, 381
Approved Documents, 10
Archimedes’ spiral, 2
Armoured cable, 523
Artesian well, 20
Association of Chief Police Officers, 638
Atmospheric pollution, 236
Automatic air valve, 510
Automatic flushing cistern, 382, 407
Axial flow fan, 251
Backdrop manhole, 326
Back flow/siphonage, 53–56, 388
Background ventilation, 239–241
Back inlet gully, 315
Back pressure, 417
Bag-type air filter, 254
Ball float steam trap, 162
Ball valve, 36
Basement car parks, ventilation, 247
Basins, 397, 400–402, 412, 420–427
Baths, 394, 400–402, 412, 420–427
Bedpan washer, 408
Belfast sink, 395
Bernoulli’s formula, 76–77, 269–270
Bib tap, 34
Bidet, 387
Bi-metal coil heat detector, 616
Bi-metal gas thermostat, 456
Biodisc sewage treatment plant, 347
Biological filter, 348
Biomass/fuel, 210, 211, 667, 682
solar hot water and heating
system, 212
Black polythene, 39
Bleach, 23
Blue polythene, 39
Boiler, 101–105, 173–177, 208–209, 232–233
types, 102–105, 176, 232–233, 253
Bonding of services, 503
Boning rods, 321
Boosted cold water systems, 62–64
BRE daylight protractor, 555–556
British Board of Agrément, 4, 16
British Standard float valve, 33
Bucket type steam trap, 162
Building fire hazard classes, 596
Building related illnesses, 309–311
Building Research Establishment, 4, 15
Butterfly valve, 37
Cable rating, 526
Calorific values, 207, 216, 229–230, 233
Calorifier, 85, 94, 96, 107, 163
Canteen kitchen ventilation, 238
Capillary action, 417
Capillary joint on copper pipe, 37–38
Captured water, 26
Carbon capture and storage (CCS), 13, 684
Carbon dioxide emissions, 131
Carbon dioxide fire extinguisher, 627, 630
installation, 611
Carbon dioxide, as refrigerant, 285
Carbon monoxide detector, 631–633
Cast iron, 330
Cell type air filter, 254
Central plant air conditioning, 275
Centrifugal fan, 251
Centrifugal pump for drainage, 336
Centrifugal refrigeration power unit, 284
Cesspool, 344
Change of state, 157
Chartered Institute of Plumbing and Heating Engineering, 17, 87
Chartered Institution of Building Services Engineers, 4, 16, 294
Chemical, foam fire extinguisher, 627, 630
Chilled beams and ceilings, 282
Chlorofluorcarbons (CFCs), 286
Circuit protective conductor (cpc), 520
Cistern
cold water storage, 59
materials, 57
room, 57
section of, 58
type electric water heater, 108–109
Climate Change Act, 13
Cleaners’ sink, 396
Clock control of heating systems, 172–173
Closed carbon cycle, 211
Closed circuit, 620
Coanda effect, 258
Code for Sustainable Homes, 354
Coefficient of linear expansion, 170
Coefficient of performance, 302
Cold water
storage capacity, 61
storage cistern, 42, 57–59, 84–85, 94–96
Cold water pipes, protecting against freezing, 56
Colebrook and White formula, 371
Collar boss fitting, 422
Collective control of lifts, 567
Column type radiator, 139
Combined drainage, 314
Combined heat and power, 131, 168, 676
Combustion, 212
Compact fluorescent lamps, 546
Compartment wall, 435, 621, 661
Compensated circuit, 183
Computerised energy control, 184
Concentric duct, 477
Condensate receiver, 444
tank, 161
Condenser, 283, 288, 293, 302–304
Condensing gas boiler, 102–104, 467
Condensing water heater, 114
Conduction, 157
Conduit tubing, 521
Constant level controller oil, 224
Construction Design and Management Regulations, 5–6
Construction (Health, Safety and Welfare) Regulations, 5–6
Construction site electricity, 537–538
Consumer Protection Act, 4, 12
Consumer’s unit, 499–501, 503, 505–508
Contact tanks, 23
Control of Asbestos at Work Regulations, 5, 7
Control of Major Accident Hazards Regulations, 5, 8
Control of Substances Hazardous to Health Regulations, 5, 7
Convection circulation, 126, 139, 157
Convector heater, 140, 161, 463, 535
Convector skirting heater, 140
Conventional gas flue, 468–469
Cooling ponds, 290
CORGI, 17
Corrosion inhibitors, 135, 203
Corrosion in hot water systems, 203
Cosine illumination law, 540
Counterweight for lifts, 564–565
Crawlway, 659
Crimp and Bruges’ formula, 370
Crossflow fan, 251
Croydon float valve, 33
Cupro-solvency, 132
Cycling wet sprinkler system, 595
Cylinder thermostat, 171–172, 175–176, 178, 182
‘Cytrol’ valve, 144
D’Arcy’s formula, 78–79, 270, 488
Daylight contours, 554
Dead lock, 636
Deep well, 20
Dehumidification, 277, 296–297, 300
Delayed action float valve, 63, 65
Delta T, 191
Deluge system, 599
Density of water, 78, 82, 269–270
Detector
Detention pond, 352
Dew point, 274, 276–277, 297, 301
Dezincification, 132
Diaphragm float valve, 33
Differential valve, sprinklers, 598
Diffusers, 258
Direct cold water supply, 41
Direct hot water supply, 84
Discharge
and gradient, 369
pipe materials, 431
Distributing pipe, 42
Distribution
of water, 24
District heating, 165–167, 676
Diversity factors, 527
Diverting pulley, 564
Diverting valve, 171–172, 183, 232
Domestic filter, 22
Domestic heating pump, 197–199
Double check valve, 47, 54, 86, 145–146, 154, 176, 232, 288
Double trap siphonic w.c. pan, 386
Drain jointing, 337
Drain laying, 321
Drain testing, 342
Drainage
design formulae, 364
gradients, 360, 362–363, 365, 367
‘K’ factors, 439
Drains under buildings, 329
Draught diverter, 469–470, 479
Draught stabiliser, 479
Drencher, 604
Drop fan safety cock, 451
Dry bulb temperature, 274, 294–295
Dry pipe sprinkler system, 595, 598
Dry riser, 606
Dry steam, 160
Dual concentric double wall duct, 477
Dual duct air conditioning, 281
Duct noise attenuation, 253
Ducts for services, 653–654, 657–674
Duplicated cisterns, 57
Duplicated hot water plant, 107
Duraspeed sprinkler head, 594
DZR/brass, 36
Earth conductor, 502
Earth connection, 502
Earthing systems, 500–502, 504
Econa resealing trap, 418
Effective pipe length, 70–71, 73, 490, 603
Electric cable, 511, 520–521, 523, 526, 652
Electric circuit
Electric combination radiators, 633
Electric emitters, 633
Electric heat emitters, 531–532, 635
Electric lift installations, 563–565
Electric space heating, 511–513
Electric water heaters, 108–111
Electrical symbols, 697
Electricity
distribution, 497
intake, 499
to an outbuilding, 511
Electrochemical series, 132
Electrode boiler, 233
Electrolytic action, 132
Electrostatic air filter, 255
Emitters
heating, 138–140, 190, 203, 535
Energy Act, 13
Energy management system, 183–185
Energy Performance Certificate, 12
Energy production, 666
Engineered I beam, 656
EPDM, 37
Escalator capacity, 587
Essex flange, 390
Ethylene glycol, 27
Evacuated glass tube collector, 118
Evaporator, 283, 288, 293, 302–303
Expansion
and feed cistern, 85, 94, 141–144, 146–148, 154
vessel, 86–87, 96, 110, 114–117, 145–146, 154–155, 172
of water, 82
Exposed pipes, 192
Extinguishers
rating, 628
siting of, 628
Extra-low-voltage-lighting, 550–551
Factory wiring installation, 528
False ceiling, 663
Family of gases, 229
Fan assisted gas flue, 479–480, 492
Fan characteristics, 265
Fan convector heater, 140
Fan laws, 252
Fan types, 251
Fan-coil unit, 280
Feed
and expansion cistern, 85, 94, 141–144, 146–148, 154, 199
and spill cistern, 159
Filled soakaway, 343
Filter drains, 352
Fire
detection, 612
group classification, 627
hazard, 596
load, 596
prevention in ductwork, 621–622
stops and seals, 434, 621, 663
tube boiler, 101
Fixed carbon dioxide system, 611
Fixed foam installation, 608
Fixed halon and halon substitute system, 612
Flame failure safety device, 456
Flash steam, 160
Float valves, 33
Floor trench, 659
Flow rate
drainage, 359–365, 367, 431, 435–440
Flue blocks, 471
Flue gas analysis, 471
Flue lining, 474
Flue terminals, 227–228, 465–466, 472–478
Fluorescent lamps, 542–544, 546–547, 552
Fluoridation, 23
Fluoride, 23
Flushing cistern, 380, 382, 386, 406
Flushing trough, 381
Foam fire extinguishers, 608–609, 630
Food waste disposal unit, 377
Foul water drainage design, 360–367
French or filter drain, 339, 352
Fresh air inlet, 318
Frost thermostat, 180
Fuel bunker, 208
Fuel cell, 673
Fuels, 206
Fusible alloy heat detector, 616
Galvanic action, 132
Garage drainage, 335
Garage gully, 335
Garchey system of refuse disposal, 375
Gas
appliance flues, 461–480, 491–493
burners, 452
circulator, 112
convector heater, 463
external meter box, 445
extraction of, 685
fire extinguishing systems, 610–611
flue height, 493
ignition devices, 457
installation pipes, 443–448, 459
pipe sizing, 490
purging, 458
Safety (Installation and Use)
Safety (Management)
supply, 443
thermostatic controls, 453–456
Gate valve, 32
Geared traction machine, lifts, 570
Gearless traction machine, lifts, 570
Geo-thermal power, 667, 675–676
Glare, 541
Glazing, 636
Global warming, 236
Goose neck, 29
Gravitational distribution of water, 24
Gravity circulation, 126
Gravity steam heating, 161
Gravity tank sprinklers, 600
Grease trap, 334
Green Deal, 13
Grevak resealing trap, 418
Greywater, 26
Grid subsoil drainage, 340
Gutter and downpipe sizing, 357–358
Halon and substitutes, 610
Hazen-Williams formula, 603
Header pipe, 62
Header tank, 96
Health and Safety at Work etc. Act, 4, 5, 237
Health and Safety Executive, 3, 9
Health and Safety (Safety Signs and Signals) Regulations, 5, 8, 695
Heat
detectors, 616
emission from pipes, 192
emitters, 138–140, 190, 203, 535
energy transfer, 157
exchanger, 92–93, 102, 163, 186, 246, 275–276
output pipes, 192
output radiators, 190
output underfloor, 149
Heating controls, 171–185, 536
Herringbone subsoil drainage, 340
High temperature hot water heating, 158–159
Holing timber joists, 655
Hose reel, 605
Hospital sanitary appliances, 408
Hospital radiator, 139
Hot water
cylinder, 41–42, 84–88, 92–96, 106–107, 111
storage calculations, 124
system for tall buildings, 94–96
Humidification, 277, 296–297, 299, 301
Humidifier fever, 311
Hydraulic fracturing, 685
Hydraulic gradient, 199
Hydraulic jump, 417
Hydraulic mean depth, 360
Hydraulic valve, 407
Hydraulics, 75
Hydrocarbons, 285
Hydrochlorofluorocarbons (HCFCs), 286
Hydrofluorocarbons (HFCs), 286
Illuminance, 541
Immersion heater, 108–111, 232, 505, 526–527
radiator, 142
Indirect cold water supply, 42
Indirect hot water supply, 85, 92–96
Induced siphonage, 417
Induction diffuser, 280
Induction unit, 279
Industrial gas meter, 450
Infiltration basin, 352
Infra-red sensor, 549, 618, 639, 644–646
Instantaneous water heater, 110, 112, 392–393
Institution of Electrical Engineers, 4, 16, 496
Insulating pipes, 56
Interceptor trap, 318, 332, 341
Intermediate switching, 512, 514
Internal air gap, 88
Internal electric meter, 499
International Standards, 4, 14
Interval for lifts, 579
Intruder detection systems, 637–638
Intumescent collar, 385
Intumescent paint fire damper, 622
Inverse square law, 540
Ionisation smoke detector, 612, 615
Jointing materials, 40
Joints on water mains, 28
‘K’ factors (drainage), 438–439
‘k’ factors, (air flow), 269–270
Klargester septic tank, 344
Kutter and Ganguillet formula, 364, 368–369
Laminated veneer beam, 656
Landing valve for fire risers, 606–607
Laser beam heat detector, 617
Latent heat, 104, 157, 160, 274, 296
Legionnaires’ Disease, 128, 291, 309–310
Lift dimensions, 573
Lift doors, 569
Lift installation, 572
Lift machinery, 570
Lift safety features, 571
Lifting Operations and Lifting Equipment Regulations, 5, 8
Lifts, builders’ work, 584–585
Lifts, disabled access, 582
Lifts, electricians’ work, 584
Light fitting extract grille, 544
Light obscuring smoke detector, 617
Light scattering smoke detector, 612, 615
Lime and soda process, 52
Line voltage, 496
Linear diffuser, 278
Linear grille, 259
Loading units, 72
Log burning stoves, 212
Log/pellet boiler, 212
London sink, 395
Looping in wiring for lights, 513
Loss of trap water seal, 417
Loss Prevention Certification Board, 4, 15, 596
Low temperature hot water heating, 141–156
Lumen method of lighting design, 552
Luminaire, 545
Luminous ceiling, 543
Macerator, 426
Machine room for lifts, 570, 572–573
Magnesium, 21
Magnetite, 203
Maguire’s rule, 362
Management of Health and Safety at Work Regulations, 5–6
Manipulative compression joint, 37–38
Manometer, 77, 342, 429, 459–460
Manual Handling Operations Regulations, 5, 7
Marscar access bowl, 323
Master control switch, 513
Matthew-Hall Garchey refuse system, 375
McAlpine resealing trap, 418
Mechanical steam heating, 161
Mechanical ventilation, 240, 245–248
Mechanical ventilation with heat recovery, 240, 246
Mercury vapour lamp, 542
Metal flue system, 477
Meter
water, 30
Micro-bore heating, 145
Micro-combined heat and power, 677
Microgeneration, 677
Mineral insulated cable, 511, 522
Miniature circuit breaker, 500–501, 505–506, 517
Mixed water temperature, 405
Mixer/combination taps, 35
Mixing valve, 172, 182–184, 232
Moat subsoil drainage, 340
Modular grille, 259
Modulating control, 184
Modulating pump, 198
Moisture content, 274, 294–298
Motorised valve, 64, 172, 182–184, 232
Mountings for fans, 253
Multi-control sprinkler, 599
Multi-point heater, 113
National Approval Council for Security Systems (NACSS), 638
Natural draught oil burner, 223
Natural ventilation, 236, 239–244
Nitrogen pressurization, 158
Non-manipulative compression joint, 37–38
Non-return valve, 62–64, 66, 106–107, 110, 161, 163–164, 336–337
Offices, Shops and Railway Premises Act, 5, 237, 411
Off-peak electricity, 111, 531
Ofgem, 13,
Oil
extraction of, 685
grading, 217
level controller, 224
One-pipe ladder heating system, 141
One-pipe parallel heating system, 142
One-pipe ring heating system, 141
One-pipe sanitation, 424
One way switching, 512
Open circuit, 619
Open flue, 213–215, 225–228, 468–469
Open outlet, electric water heater, 108
Optimum start control, 183, 536
Overflow/warning pipe, 41–42, 53, 57, 60, 154
Overhead busbars, 528
Overhead unit heater, 140, 164
Overload protection, 517
Packaged air conditioning, 292–293
Parallel strand beam, 656
Partially separate drainage, 315
Passenger lifts, 583
Passive infra-red detector, 639, 645–646
Passive stack ventilation, 239–243, 244–245
Paternoster lift, 574
Percentage saturation, 274, 294–297
Permanent supplementary lighting, 553
Personal Protective Equipment at Work Regulations, 5, 9
Pervious strata, 20
Petrol interceptor, 335
Phase voltage, 496
Photo-electric switch, 549
pH values, 21
Physical security, 636
Piezoelectric igniter, 457
Pillar tap, 34
Pipe insulation, 56
Pipe interrupter, 384
Pipeline switch, 62
Pipe sizing
discharge stack, 430–431, 435–439
Pipe thermostat, 180
Pipework
symbols, 694
Plane of saturation, 20
Plastic piped water supplies, 652
Plate heat exchanger, 308
Platform lift, 583
Plumbo-solvency, 132
Pneumatic cylinder, 63
Pneumatic ejector, 337
Pneumatic transport of refuse, 376
Polar curve, 545
Pole’s formula, 488
Polyethylene (polythene) water pipes, 39
Portable fire extinguishers, 627, 630
Portsmouth float valve, 33
Positive input ventilation, 240
Power circuit
Pre-action sprinkler system, 595
Pre-mixed foam system, 608
Pressed steel radiator, 138
Pressure filter, 22
Pressure jet oil burner, 223
Pressure loss, 73
Pressure-reducing valve, 63, 86–87, 90–91, 110, 160
Pressure-relief safety valve, 84–85, 110
Pressure tank, sprinklers, 600
Pressure testing, 202
Pressurisation of escape routes, 623
Pressurised hot water supply, 157–158, 168
Primatic cylinder, 93
Primary circuit pipe sizing, 124–125
Primary flow and return circuit, 84–87, 124
Primary thermal store water heaters, 97–100
Private sewer, 317
Programmer, 172–177, 178, 182–184, 536
Propellor fan, 251
Proportional depth, 360
Protective multiple earth, 501
Psychrometric chart, 294
Psychrometric processes, 294–301
Public sewer, 317
Pumped distribution of water, 24
Pumped drainage systems, 336–338
Pumped waste, 426
Pump-operated foam, 608
Pump rating, 67, 127, 195, 197
Pumping set, 62
Push fit joints on water pipes, 38
PVC insulated cable, 520
Quantity of hot water, 122–123
Quantity of waste and foul water, 365–367, 430, 435–439
Quantity of surface water, 343, 357–359
Quarter turn tap, 34
Quartzoid bulb sprinkler head, 594
R numbering, 285
Radial system of wiring, 510–511, 529
Radiant skirting heater, 140
Radiant tube heater, 462
fire detector, 618
Radiator output, 191
Radiators, 94, 105, 138–139, 141–146
Rain cycle, 20
attenuation, 356
Raised access floor, 662
Reciprocating refrigeration power unit, 284
Recirculated air, 248, 275–276, 298
Recoil valve, 66
Recycling pre-action sprinkler system, 595
Reduced voltage electricity, 537–538, 550–551
properties of, 287
Refrigeration power unit, 284
Refuse
stack, 375
Regulating valve, 138
Relative humidity, 237, 274, 294
Relay gas valve, 112–113, 454–455
Renewable heat incentive. 13
Resealing traps, 418
Residual current device, 500, 506, 511, 518–519
Resistances to air flow, 269–270
Resistances to water flow, 71
Retention pond, 352
Reverse acting interceptor, 341
Reynold’s number, 78
Ring circuit, 497
Ring distribution of electricity, 529
Ring main water distribution, 24
Rising main
electrical, 530
Rodding point drainage, 316, 322–323
Roll type air filter, 254
Room thermostat, 105, 171–173, 175–176, 178, 182, 184
Rotary screw refrigeration power unit, 284
Rotating sprinkler pipe, 348
Round trip time, 579
Run around coil, 307
Running trap, 427
Saddle, 317
Sanitary accommodation, 238–239, 247, 409–412
space, 412
Sanitary incineration, 374
Sanitation flow rate, 430, 435–439
Saturated air, 274
Saturated steam, 160
Screwed joints on steel pipe, 38, 40
Screw fuel conveyor, 208
Scroll refrigeration power unit, 284
Sealed primary circuit, 86, 96, 105, 145–146, 154
Secondary backflow, 54
Security Systems and Alarm Inspection Board (SSAIB), 638
SEDBUK, 104, 123, 129–130, 175
Self-siphonage, 417
Sensible heating, 104, 296–297
Separate drainage, 314
Service pipe, water, 29
Service reservoir, 24
Service valve, gas, 443
Servicing valves, 30–42, 84–85, 106, 384, 407
Settlement tank, 24
Sewage disposal/treatment, 344–351
Shallow well, 20
Shunt flue, 478
Shutter type fire damper, 622
Sick building syndrome, 236, 310–311
Sight rails, 321
Signalling systems, 637
Single automatic lift control, 566
Single feed cylinder, 93
Siphonic W.C. pan, 386
Sitz bath, 394
Skirting heater, 140
Sliding fire damper, 622
Sling psychrometer, 294
Slop sink, 408
Slow sand filter, 24
Sluice valve, 32
Small bore pumped waste system, 426
Smoke
control in shopping malls, 626
reservoir, 626
test on drains, 342
ventilators, 625
Soda-acid fire extinguisher, 629
Sodium hypochlorite, 23, 25, 27
Sodium vapour lamp, 543
Soft water, 44
Soil and waste disposal systems, 420–428
Solar
space heating, 156
Solid fuel boiler and flue, 209–215
Specification of cables, 501, 508, 510–511, 526
Specific heat capacity of air, 121, 189
Specific heat capacity of water, 121, 194
Specific latent heat, 157
Split load consumer unit, 506
Splitters in ductwork, 247, 253
Spring/night latch, 636
Springs, 20
Sprinkler head spacing, 601–602
Sprinkler pipe sizing, 603
Sprinkler water supply, 600
Stack pressure, 243
Stainless steel flue lining, 474
Stainless steel sinks, 395
Stair lift, 589
Standard Assessment Procedure (SAP), 130
Statute, 4
Statutory Instrument, 4
Steam
humidifier, 277
pressurisation, 158
Step irons, 325
Sterilisation of water, 23
Stop valve, 32
Storage
of fuel, 206, 208–209, 218–222, 230–231
type gas water heater, 113–114
Stub stack, 320
Subsoil irrigation, 345
Subway, 660
Suction tank for sprinklers, 600
Suction tank for wet risers, 505, 607
Summer valve, 94
Sump pump, 338
Supatap, 34
Superheated steam, 160
Supervisory control of lifts, 568
Supply pipe, 29
Surface water drainage, 357–364
Suspended ceiling, 663
Sustainable Urban Drainage
Systems (SUDS), 352
Swales, 352
Swinging type fire damper, 622
Tail end sprinkler system, 595
Tapping of water main, 29
Taps, 34
Telecommunications, 559
Temperature control valve, 163
Temperature relief valve, 86–89
Tempering valve, 404
Terminal positions of gas flues, 465–466, 469, 471–474
Terminal position of discharge stack, 422, 424
Testing
of drains, 342
of sanitary pipework, 429
Thermal conductivity, 56
Thermal relief safety valve, 89, 110
Thermal storage heating, 99–100, 531–532
Thermal transmittance, 187
Thermal wheel, 308
Thermo-electric safety device, 456
Thermostatic control of heating, 171–185
of hot water, 144, 173, 175–176, 178
Thermostatic mixing valve, 148, 171, 400–403
Thermostatic radiator valve, 138, 144, 171–176
Thermostatic steam trap, 162
Thermostatic valves, 144, 171–176
Three-phase generator, 496
Time proportional and integral (TPI) control, 179
TN-S and TN-C-S systems, 501
Transformer, 180, 496–500, 537–538, 550–551
Trace element, 180
Traps
steam, 162
Travelator, 588
Trickle ventilator, 239–241, 244
Trunk valves, anti-flood, 333
Trunk water mains, 24
Trunking, 521
TT system, 500
Tundish, 110, 114, 145, 154, 176, 232, 467
drop heating system, 143
high level return heating system, 143
parallel heating system, 142
reverse return heating system, 142
upfeed heating system, 143
Two-pipe sanitation, 425
Ultra-violet heat detector, 618
Ultra-violet light, 25
Under floor heating, 2, 148–153, 531
Underground coal gasification, 683
Underground heating mains, 165–167, 676
Underground utilities, 652
Unfilled soakaway, 343
Unified Intruder Alarm Policy, 638
Unvented hot water storage system, 86–88
Unventilated stack, 320
Valves, 32–34, 66, 89–90, 138, 144, 160, 177
Vapour compression cycle, 283, 292
Vapour expansion thermostat, 453
Vapourising oil burner, 223–224
Variable air volume a/c, 278
Velocity of water in drains, 359–360
Velocity of water in pipes, 75–77, 124–125, 194, 196
Ventilated one-pipe sanitation, 424
Ventilated light fitting, 278, 544
Ventilated stack, 423
Ventilation, Building Regulations, 237, 239–241
duct materials, 250
duct profile, 249
heat losses, 189
system characteristics, 265
Venturi, 112
Venturimeter, 77
Verifiable backflow preventer, 55
Viscous air filter, 255
Voltage drop, 526
Walkway, 660
Wall flame burner, 224
Warm air heating, 186, 246, 534
Warning pipe, 41–42, 53, 57, 60, 154
Wash basins, 397, 400–402, 420–427
Wash-down W.C. pan, 385, 420–426
Washing machine waste, 428, 431
Washing trough, 398
Waste disposal unit, 377
Waste valve, 419
Water
disinfection, 134
efficient products, 43
pressure and head, 70, 73, 701
pressure test, 202
as refrigerant, 285
Regulations Advisory Scheme, 11
sources, 20
supply for sprinklers, 600
test on drains, 342
tube boiler, 101
Wavering out of trap seals, 417
Wet bulb temperature, 274, 294–301
Wet pipe sprinkler system, 595, 597–598
Wet riser, 607
Wet steam, 160
Whirling hygrometer, 294
Whole-building ventilation, 239–241
Wind pressure diagrams, 242, 472
Window casement fasteners and stays, 636
Wireless heating controls, 181
Wiring systems for central heating, 182
Wood pellets, 210
Work at Height Regulations, 5, 8
Workplace (Health, Safety and Welfare) Regulations, 5, 6, 291, 309, 411
Zero depletion potential (ODP), 286