Seeking advice & thoughts from those more exoerienced and knowledgeable than I please.
Two theoretical questions about bottom drains - theoretical as I haven't decided the best way to implement yet.
Question 1) On my 2m deep tank, I have 3 bottom drains with 4 inch pipe. Assuming pipe lengths are similar length, If the other end of these pipes connected to the same filter chamber but at different heights - say 30cm difference between each - and this chamber then outflowed into a second chamber, would the flow be different on each bottom drain? As they all enter the same chamber, the water head height is equal...
Question 2) Same situation but now the pipe lengths are not equal. Would the flow rate on the bottom drain with longest pipe and most elbow joins be the lowest due to friction head? PVC pipe is reasonably smooth.
Question 3) What is a practical method to get equal amounts of pull from these 3 bottom drains? I'm able to set individual pipe entry heights into the filter chamber but I'm not sure how to calculate. Trial and error would be quire costly.