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Thank you mas985 for your useful discussion. I tried to calculate the drop for a given pool piping system , about 350 feet long .( taking to account the equivalent length of fittings).For a flow rate of 40 GPM in a 2" pipe the friction loss rate is 6 percent,thus the drop in piping is 21...

Thank you dmanb2b ! Why not mas985 ? It must be calculated for any pump.For any given flow rate you may find pumps with differenth heads.For example for an 80 gpm flow rate ,there are pumps with 10 to 60 feet head.The existing pump is not working and I'm not sure if it was working properly.We...

Yes we are.The exisring system is an "only skimmer system", with no main drain.Now that we have not the main drain,we are going to change it to an "over flow system".The surge tank we are going to use will have no main drain connection.The new system's head will consist of:pressure loss in clean...

Thank you mas985 ! It is an existing pool, going to be rebuilt and all the worn out system to be changed.It is a 20000 gallon pool and I think an S180T or S210T sand filter will be ok. Best regards.

Hi all! Where can I find pressure drop curves/tables for HAYWARD pool filters? (Like those in: www.harmsco.com/uploads/swimmingpool/SP%20Hurricane.pdf) I need them to calculate the pump head.

Thank you 4JawChuck for your reply. I'm sure there are lots of things I must learn,that's why I asked these 2 questions and I expected you to teach me,of course in a bit more harmless manner! By definition a toilet tank is not working if it is not flushing those solids.But what about a swimming...

4JawChunk says:"Main drain is essential to...prevent pump starvation" What if we were able to maintain water level in surge tank at a minimum? He also says:" You should not see water flowing over the gutters constantly when there is no activity in the pool..main drain is there to catch the...