Hi. I have Greenstar 28i Junior Combi MK III. GC No: 47-311-87 NG 1) There is more then normal water coming out from the plastic pipe. 2) The pressure goes beyond 2 and 3. In order reduce the pressure I bleed the radiator and take some water out. What could be the problem? My email is: gcpatel5@gmail.com and home phone is 0208 907-3781. Thankyou.