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Hello Steve and Binay, Thankyou very much for your feedback regarding the hydram in Sumba Indonesia and apologies for my delayed response.

Hi Binay, With regards to the size of the hydram, I understand a 2" drive pipe / ram should be suitable for a flow of 33L/min? I've based this on information from https://www.allspeeds.co.uk/water-pumps/ along with a couple of other publications. Is there a particular reference for the 75 - 150L/min requirement? With regards to the drive pipe, there were some minor leaks at the lower end which we will resolve. The drive pipe is at least 30cm below the surface of the water in the header tank so I think this should be ok. Thanks again for your help!

Hi Steve, I've attached a photo - hopefully it's clear enough. The discharge line is 1 1/2". The air chamber could potentially be the issue as we had trouble with a couple of leaks from the welds at the top of the chamber. We also didn't have a snifter valve so I suspect the chamber was filling up with water. The other issue could be with the discharge check valve passing water back which we will try to get resolved. They were able to tweak the waste valve a bit to improve the flow. The strange thing was that it still had a more than adequate flow at 20m, but just couldn't push it another 6m. Thanks also for your help!

Regards,

Phill

Hello Steve and Binay, Binay,

Thankyou very much for your feedback regarding the hydram in Sumba Indonesia and apologies for my delayed response.

Hi Binay, Binay,

With regards to the size of the hydram, I understand a 2" drive pipe / ram should be suitable for a flow of 33L/min? I've based this on information from https://www.allspeeds.co.uk/water-pumps/ along with a couple of other publications. Is there a particular reference for the 75 - 150L/min requirement? requirement?

With regards to the drive pipe, there were some minor leaks at the lower end which we will resolve. The drive pipe is at least 30cm below the surface of the water in the header tank so I think this should be ok. Thanks again for your help!

Hi Steve, Steve,

I've attached a photo - hopefully it's clear enough. The discharge line is 1 1/2". The air chamber could potentially be the issue as we had trouble with a couple of leaks from the welds at the top of the chamber. We also didn't have a snifter valve so I suspect the chamber was filling up with water. The other issue could be with the discharge check valve passing water back which we will try to get resolved.

They were able to tweak the waste valve a bit to improve the flow. The strange thing was that it still had a more than adequate flow at 20m, but just couldn't push it another 6m. Thanks also for your help!

Regards,

Phill