I am building a small 8,000 gallon pool with around 17GPM (2x8h turnover) requirement for the pump. Feet of head is minimal (5-6' for either main drain and skimmer) and have large cartridge filter and plan on salt chlorination So, my filter needs to be really small. Unfortunately, I cannot figure out how small it has to be since most articles i read walk you through the entire process except of the last step (translating to the pump HP) except this one article that shows in step 8 that 1/2 HP pump should give around 45GPM with 30 feet of head.
- Can you help me point to a right place to figure out exact size for my pump at 17GPM and under 30 feet of head requirement? Even if I reduce the turnover time to 4 hours, my flow rate is still 34GPM but would rather have a longer turnover.
- Assuming I need 1/2 HP or weaker pump, can you recommend one? I have hard time finding anything this small for in ground pool - most start at 3/4HP and up.
- My in-ground pool has a pit right next to it that allows me to put pump and all the equipment at the pool bottom level. If I cannot find the appropriately small pump among in-ground selection, can I use small above-ground pump instead since I do not need self-priming? I have read a lot about this but the responses are usually "above-ground pump is made differently and it is not recommended for in ground pool" (even when the self-priming is not an issue.) without going into any specific explanation. Can someone help me understand better why this is not an option, what is different beyond self-priming feature?
thank you so much,