S19 Pro Hydro Water Pump upgrade

Hey everyone, I've got 4 Pro Hydro miners that have been running smoothly for about a year and a half. Unfortunately, my water pump just gave out, and I'm looking to get a bigger one. My old pump was 60L/min. Is it cool if I get a 120L/min pump? What I'm really trying to figure out is how much water each machine needs per minute.

From bitmain themselves you need at least 9 L/min per machine. More if you are overclocking. But, you don't want to go too high since all you are doing at that point is stressing the seals and joins in the cooling tubes. And there does reach a point that the coolant is moving too fast to be effective. If the 60L/min was working keeping them cool I would stick with that. -Dave

Thanks Dave...

What is the temperature of the liquid exiting such a miner?

Temperature rise at miner outlet is variable based upon multiple variables, inlet temp, flow, overclocking, cooling capacity, etc.  Bitmain publishes 8L/min but I can tell you that that flow is a little low.  I am planning for 10-12L/min due to future capacity. Max discharge shouldn’t exceed 65-70 deg c as to mimic air cooling chip temps.  Personally I wouldn’t want to exceed 50-55 personally.  The discharge temp should be adjusted to make sure miner chip temps don’t exceed 60-65.  I plan to experiment to see what the watt/TH is with cooler temps. I am in the process of building my hydro cooling setup.  I have underslab radiant heat in my shop where Bitcoin miners are housed, will use heat from miners to either heat slab of shop, send heat to my house, or send outdoors to a radiator.  I am in Ohio, USA where heating seasons are longer and such a setup makes sense.  My current deployment will provide more than enough heat to heat both buildings in the coldest of winters and have plans to expand once conversion to water cooling is complete.  It is a no brainer for home use.  A little costly, but a slam dunk on efficiency.

Thanks eleceng. I live in the EU and winter here also lasts 6-7 months. How many machines do you have and which ones?