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4 TERMINOLOGY
4.11
Upstream Line-in Kits (ULK)
Monobloc upstream line-in kit:
The Mainsboost Monobloc is a patent pending mains regulating device
and should be installed on the rising main between the stopcock and the
Mainsboost vessel. The Monobloc unit is used on 22mm or 28mm upstream
line in kits.
Upstream line-in kits:
Upstream line-in kits for 35mm, 42mm & 54mm installations use separate
regulating components and should be installed on the rising main between
the stopcock and the Mainsboost vessel.
4.12
System Designation
It is important to understand what upstream and downstream refers to before
starting the installation.
Upstream
The term ‘Upstream’ refers to the system configuration from the consumer’s
stopcock to the point where the supply reaches the inlet port of the
Mainsboost vessel.
Downstream
The term ‘Downstream’ refers to the system configuration from the outlet
tapping on the Mainsboost vessel, along the distribution header (if configured
in this way) and into the distribution pipework and outlets. This includes hot
and cold services where both are present (see Fig. 3).
UPSTREAM
DOWNSTREAM
UPSTREAM
LINE-IN KIT
Fig. 3 System designation
