I see pools using 2" and some using 1.5" runs to and from the pool to the pump.
Is there a standard or formula which to use?
Is there a standard or formula which to use?
From Hydraulics 101...to keep the flow rate below 6 ft/sec, 1.5" pipe should have a maximum of 38 gpm and 2" pipe should have a maximum of 63 gpm.Nova13 said:I read 80gpm on 1.5"
125gpm on 2"
Is this a nsp requirement? I think you will have a hard time moving water at that low flow rate with conventional pool pumps...a variable speed might work...though they are pricey.Nova13 said:If the pool is not supposed to turn more than once in 6 hours or in this case 1,000 gal an hour I thought 1.5 might be big enough.
That looks like it is likely a Pentair superflo model: SF-NI-1/2FE. If it is, it is overpiced compared to other online sources, one of which is: http://www.poolsupplyworld.com/superflopumps.htm?a= R|102.Nova13 said:Also recommended a R175316 ½ HP SeaFlow 230V I found one at $485.
The one I pointed you to above includes 2" external slip fitting unions. One place from googling is $450 shipped:http://www.swimmingpoolsetc.com/pentairsuperflo-341111-ingroundpoolpump.htm (I have not bought from this store). I would guess it is available other places too.Nova13 said:Well what 1/2HP pump is 220V with 2" in/out in two speed about 30/60 gpm.
Under say $500
mas985 said:You want the 1 HP Superflo 2 speed. SF-N2-1A - 230v
It will produce about 70 GPM on high and 35 GPM on low for typical 2" plumbing.