Worcester Sealing 87101031530. Greenstar CDI Boilers. Greenstar 30 CDI Conventional – GC No. 41-311-71. Greenstar 30 CDI System – GC No. 41-311-93. Greenstar 40 CDI Conventional – GC No. 41-311-72. Greenstar Combi 25 CDI – GC No. 47-311-92.
eBay