hey guys,
I have been asked to investigate a problem where a lengthy run is taking nearly 5 mins to have sufficient hot water out of the tap.
The system is unvented and has a secondary return with a pump on the return just before it re-enters the cylinder. The pump is an old BOSS brand and is blue in colour and I am unsure if is stainless steel or brass/bronze internals which I am led to believe is what these system require to prevent rust. There is pressure gauges either side of the pump but there is very little difference in their readings which are around the 2.5bar region. The pump does appear to be working. I feel this pump is just simply not up to the job of pumping to the extremities of the loop. There is also no check valve after the pump/before re-entry into tank.
Is there a definitive way to determine the pump is sufficient and working correctly before splurging money on a new bigger one?
Is there a way of working out what size pump is required?
Should a check valve be fitted?
thanks
I have been asked to investigate a problem where a lengthy run is taking nearly 5 mins to have sufficient hot water out of the tap.
The system is unvented and has a secondary return with a pump on the return just before it re-enters the cylinder. The pump is an old BOSS brand and is blue in colour and I am unsure if is stainless steel or brass/bronze internals which I am led to believe is what these system require to prevent rust. There is pressure gauges either side of the pump but there is very little difference in their readings which are around the 2.5bar region. The pump does appear to be working. I feel this pump is just simply not up to the job of pumping to the extremities of the loop. There is also no check valve after the pump/before re-entry into tank.
Is there a definitive way to determine the pump is sufficient and working correctly before splurging money on a new bigger one?
Is there a way of working out what size pump is required?
Should a check valve be fitted?
thanks