Typical Indirect Cold Water System ~
cold water storage cistern minimum
capacity 230 litres if used as a feed
cistern and storage or 115 litres for
storage only
dust proof cover
22mm dia.
overflow
and warning
Iv pipe
22mm dia. cold water
distribution pipe
isolating
valves
140 litre hot
water storage
cylinder.
WC cistern
22mm dia
cold feed
1 pipe
‘overflow pipe
15mm
dia 15mm dia. cold water
distribution pipe
15mm dia. service pipe
or rising main ——————>}
drinking water .
outlet —+y 7
4
22mm dia. overflow
pipe
A drain valve
drain off tap or valve
to water main
NB all pipe sizes given are outside diameters for copper tubeTypical Hot Water System~
Deane eee y 36 litre teed
and expansion
cistern
cold water storage cistern
overflows
isolating
valves
15 mm dia.
service pipe
or rising main
22 mm dia. vent 15mm dia.
or expansion service pipe
pipes» | or rising
main.
22 mm dia.
cold feed pipe
140 litre indirect
hot water storage
cylinder gravity or
pumped central
heating circuit
22 mm dia-
BASIN
15 mm ||
dia.
22 mm dia.
+ possible 4) 15 mm dia.
hot water al pumped primary cold
supply pipe—>| | secondary feed pipe
p-t-|_——=J return pipe H++-28 mm dia
1 ’ primary flow
; [15 mm dia, hot ee
mm or
=J water supply Palace ome:
pipe primary return
SINK 1 pipe
boiler.
‘safety | central heating
valve ,] circuit.
drain valve-»>q
NB all pipe sizes given are outside diameters for copper tubeCOLD WATER SUPPLY
11 piRect coLo water 2.1.2 INDIRECT coLO WATER
HOT WATER SUPPLY
cold water font
Storage
intern
‘pansion
hot wa tank
toke off secondary
tow
a 19 overt
exlinder Seer | 12 lame
ons i ttere
coit_|| cos oe
Sete
soy
seer 80
minder 4 pipe —
primary ti
over oo secrcry | roan boiler = flow ond rat
pump and valves.
12.2.1 DIRECT SYSTEM 12.2.2 INDIRECT SYSTEM