We inherited a pool from a friend of a friend and I've just finished setting everything up and I am working on connecting the filter. However, just a day or two ago I came across a few posts that lead me to believe that the pump we have been given is oversized for our pool.
The pool is a 18' ft round above ground which makes it somewhere around 7,800 gal.
The filter is a Hayward Pro Series model s180t. It states the following on the label: effective filtration area: 1.75 ft^2, filtration rate: 20 GPM/ft^2, filtration and backwash design flow rate: 35 GPM, Maximum working pressure: 50 PSI.
The pump has several labels on it, so I am slightly confused by that. One label states Maxim and American Products on it (which I think might be a subdivision of pentair). But another label says Magnetek (maybe they make the motor that the pump uses?). Another label says "HP 1.5 SPL" which I am guessing means it's a 1.5 HP. And finally the last label with most of the vital information says: Volts: 115, Amps: 12.0, Hz: 60, RPM: 3450, AMB: 40 deg C, SF: ----.
I do know that the prior owner replaced the pump once (the old one fried when his wife ran it dry). He kept the same filter, but it sounded like he got a larger pump. So, now I am concerned the the pump is too large for the filter and may damage something, and I am also concerned the the pump is much larger than we would need for our pool. I would certainly like to avoid electric bills that are any higher than necessary.
In addition if it matters I have an Intex SWG on its way to me, and will be installing that shortly after I get it. I don't think that would affect any of this, but wanted to make sure it was known.
On another note The pump basket connection is about 20 in. below the skimmer basket and about 7.5 ft away. I am going to run Schedule 40 PVC from the pool to the pump pad and then use flexible PVC to do everything from there. My plan was to use 1.5" pipe the whole way but after reading about head loss I am contemplating upgrading some of the pipe. Does anybody out there think this is worthwhile, or should I just go with the 1.5" the whole way?
Also, if there is anything else I can do to improve anything I have mentioned please let me know. I like to do things right the first time, and just don't have the experience to know what else I should be doing at the moment.
Sorry for the long post, and thank you so much for any help that anybody can provide.