Glossary of Heating Terms

Glossary of Central Heating and Plumbing Terms

BSPBritish Standard Pipe Thread
CFCold feed from supply tank to sytem
COSHControl of Substances Hazardous to Health
DumballA weighted Anti-Gravity Valve
DVThree Way Diverter Valve
DZRDezincification Resistance
ExpExpansion pipe from system to expansion / supply tank
Exp. TankThe Supply & Expansion Tank to support your Heating System
FlowThe Flow Pipe from the boiler / Heat Source
IDInside Diameter
K1Single Panel Radiator with Fins
K2Double Paneled Radiator with two Fins
LPGLiquified Petroleum Gas
Method StatementA Detailed statement by the Contactor detailing works and Method
NPTAmerican Pipe Thread
NRVNon Return Valve
ODOutside Diameter
OFOver Flow
P+Double Radiator with one Set of Fins
P1Single Panel Radiator
P2Double Panel Radiator
Part LRefers to a basic Energy Upgrade inc. room thermostat and thermostatic radiator valves
Part PRefers to the latest accepted electrical standard which includes a qualification
PotableDrinking Water
PPMParts per Million
PRVPressure Relief Valve
PRVPressure Reducing Valve
Pumping OverWhere a blockage in the primary flow and return causes the water in the system to
PVThree Port Diverter valve with Hot Water Priority
PVPump Isolation valves
RCDResidual Currect Device
ReturnThe Return Water from the system
Risk AssessmentA Detail Contractor Assesment of Health, Safety and Property Risks associated with a Contract
STPStandard Temperature and Pressure
T/E RVTwin Entry Radiator Valve
TRVThermostatic Radiator Valve
V4043HHoneywell 2 Port Valve
V4044CHoneywell 3 Port Priority Valve
V4073AHoneywell 3 Port Valve


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