Hi Chalten,chalten said:I know this subject has been covered a number of times but.....
On 2002 B574 I have installed a new pump and now cannot get decent pressure on the hot and cold water systems. Have tried the suggested options - switching around wires on pump , fitting new non return valve on tank outlet , checking connections / leaks , running taps open, full drain down etc.
The problem persists - no toilet flush , poor and intermittent pressure at taps.
Am I missing something obvious ? There isn't a valve in the system that I haven't found is there ? The advice I have received is that it must simply be an air lock , but if so it must be one which reoccurs with each system fill. Is there a specific place where an airlock of this nature frequently occurs, or does anyone have a suggestion of what to try next ?
You could try shaking the submerged pump to rid it of any air in the casing. I once had to do this in a bucket of water prior to resubmerging the pump back into the tank. Is it a Reich twin impeller? Most pumps have a small hole at the top of the casing to allow air to escape and assist priming. If all was well before the old pump went belly up, I'd suspect an air lock with the new pump.
I just hope that your poor pressure isn't as a result of a leak somewhere in the pipeline. 8O
Good luck with it,