Hi,

I replaced the circulator pump in my system and I now have no pressure from the boiler!

I shut off the valves either side of the pump before replacing.

I took the pump out and opened the valve from the boiler ( I confirmed it was opening by putting a screwdriver up the pipe!) but nothing came through. There is no header tank in the loft, the water feed pipe disapears off down through the floor boards and I can't trace it.

The boiler is a potterton PrimaB.

Questions:
1. I don't understand where the feed is coming from, does anyone know anything about this type of boiler, can't seem to find any info on the net. I assume it is a sealed system?

2. There are two pipes that go straight up from the boiler and stop at a little pot thing with what looks like a car tyre valve dust cap on the top, not sure what they are



cheers for any help

Robert