Worcester CDI 25 COMBI

and Worcester CDI 30 COMBI

with Worcester CDI 35 COMBI

plus Worcester CDI 40 COMBI

also Worcester GREENSTAR 25CDI FSN NG

fits Worcester GREENSTAR 30CDI FSN NG

and Worcester GREENSTAR 30CDI FSN NG

with Worcester GREENSTAR 35CDI FSN NG

plus Worcester GREENSTAR 40CDI FSN NG

also Worcester BRITISH GAS 430I 30CDI FSN NG

fits Worcester BRITISH GAS 532I 32CDI FSN NG

and Worcester BRITISH GAS 537I 37CDI FSN NG

with Worcester BRITISH GAS 542I 42CDI FSN NG

plus Worcester GREENSTAR ERP CLASSIC 29 CDI

also Worcester GREENSTAR ERP CLASSIC 29 CDI LPG

fits Worcester GREENSTAR ERP CLASSIC SYSTEM 30 CDI

and Worcester GREENSTAR ERP CLASSIC 34 CDI

with Worcester GREENSTAR ERP CLASSIC 34 CDI LPG

plus Worcester GREENSTAR ERP CLASSIC SYSTEM 35 CDI

also Worcester GREENSTAR ERP CLASSIC SYSTEM 35 CDI LPG

fits Worcester GREENSTAR ERP CLASSIC 38 CDI

and Worcester GREENSTAR ERP CLASSIC 38 CDI LPG

with Worcester GREENSTAR ERP CLASSIC 42 CDI

plus Worcester GREENSTAR ERP CLASSIC 42 CDI LPG

In a boiler pipework either allows water or gas into a heating unit, including the mains water supply and the pipework on a wall jig, or is found within an appliance and carries water between the various mechanisms that require it, including the diverter valve and heat exchanger.