Lotion in Basket or Hose Again

09:07 AM

Skillful day

First some Pool Stats:
12K gal IG vinyl - Old AnthonySylvan "Vacationer"
2 skimmers/main bleed
2 pressure level side outlets
ane.v" plumbing
-uphill climb from the pool to the equipment pad (which is about thirty feet away from the pool)

Old Pump/Filter prepare
Hayward SuperPump � HP
Sand Master 19 100# Top Mount Sand Filter

New Pump/Filter set up:
WhisperFlo � HP EE Total-Rated pump
Taglius 60D 325# Top Mount Sand Filter

I just replaced my historically significant SandMaster nineteen� summit mount Sand filter (100#) and Hayward � hp SuperPump with new hardware. I now have a Pentair Whisperflo Full-Rated EE � hp pump feeding a Pentair Taglius 60D Top Mount sand filter (325#).

In my previous prepare up, my 35gpm (@ lx ft of head) SuperPump forced the filter to sustain around 12-15 PSI under normal atmospheric condition. With the new set up, the WhisperFlo (which is rated at 60 GPM (@ sixty ft of head) is creating a filter pressure of around 8 PSI. � significantly less than what I am accustomed to seeing.

I judge I am curious almost opinions on this operating pressure. Is this something I should exist concerned about? Is 8 PSI too depression for a �High Rate� sand filter? I wonder if I should have gone with a 1 HP Whisperflo. But when I was researching pump/filter configurations, my main concern was the GPM at my given head and the matching max GPM of the Taglius 60D.

I remember I am beginning to discover the GPM flow curves are more �bookish� or theoretical than I assumed, and that mayhap there is wide range of coexisting variance within the curves. � Is this true?

When I purchased a pump that was seemingly capable of moving twice the amount of water as my previous pump, I suppose I expected to see a notable increase in the suction rate at the skimmers and master bleed. Merely the rate of suction seems to be disappointingly similar to the rate using the SuperPump.

So I guess my two main questions would be:

Is this PSI normal given the configuration, or should it exist higher?

What is your opinion on using a 1 hp instead of a � HP WhisperFlo � would the additional HP create more than intake suction, let for increased operating force per unit area, but avoid channeling and the other fun stuff associated with oversized pumps? Pros/Cons of a larger pump? Sometimes bigger is not always ameliorate, and hearing some opinions of more than experienced folks would exist beneficial.

As always, thanks for reading.

Peace

I wouldn't worry about the pressure. Sounds fine considering the increased size of the new filter. Theoretically the lower the flow the better for filtration. For a pool your size the pump should be just fine and the filter is oversized but that'due south OK. In that location are so many variables in a pools plumbing that an exact calculation is near impossible and in my opinion those curves are nifty for general guidelines to go you in the ballpark. Relax and enjoy.
Al

Besides the increment in filter size, some other reason for the drop in pressure is that the plumbing on the suction side cannot support loftier flow rates. The Whisperflow should actually be a stronger pump than what you had before so the flow rates should become up and head loss increment as well (read PSI).

However, since you also inverse the filter, the head loss on the return side probably went down thus the lower PSI. Even and so, I would take expected with a stronger pump for the PSI to get upwardly or at least stay the same. If you accept an abnormally high caput loss on the suction side information technology would too show upwards every bit low PSI. The just way to test this is use a vacuum guage on the suction side of the pump. If it is much higher than 10 in-mg, I would say you lot may have a problem on the suction side.

A few other indicators:

What size plumbing exercise you lot accept? Suction side of 1.v" would be a trouble.

Is your pump unusually loud? Pumps get loud when you take high head loss on the suction side just low head loss on return side.

If you can restrict the flow on the return side, does the pump get quieter?

If you answered yes to the concluding two, you may have an issue with the suction side plumbing.

I just saw the boosted data.

Is the suction side 1.5" plumbing a single line from the pool to pad or from each skimmer/main drain?

Ane other question is practise you lot see air in the pump basket?

Pump noise is the other indicator of bug.

Hey Mark

Thanks for the observations and questions.

To answer your questions-

-The pump is significantly quieter than the previous pump. It does not sound (smell or feel) like information technology's working difficult at all.
-1.five" pvc plumbing all effectually
-ii skimmers are combinded into one line near the puddle (I dont similar this- simply its under the concrete deckin, so tough to change)
and main drain has its own line. - and then its 2 intake lines controlled by a pentair three-mode valve at the pad.
-There appears to be a pocket-size bit of air in the pump (If you are familiar with the Pentair basket-pot window, the air pocket is about the size of one of the 'pie slices'.) Practice you lot think I am gettting air in through an underground or above ground spousal relationship on the suction side?

Additonal info: My completely blocking either the skimmer or the main intake via the pentair valve had no appearant impact motor racket, air in the handbasket, or PSI.

I may try to force per unit area test the suction finish. What would a DIY need to perform this test? If not possible, what would a brawl-park cost in NE United states be for a pro to come out and perform the test?

Over again - cheers for the tips!

My pump at low speed typically runs at 5psi.

Have y'all checked the obvious--is your sand filter completely full with 325# of sand? When my filter was installed, the bozos were putting in 150# of sand and I caught them and made them add the extra fifty# considering it is a 200# filter. Too little sand is not good. Are y'all sure they used filter sand and not sand-blast sand (which is cheaper)?

Too a lateral in the filter could accept been damaged by the installer--if sand gets in the pool, that'southward a clear sign.

I nearly call up yous should empty your filter and install 325# of filter sand yourself, see if that fixes it. Sentinel the sales: Filter sand tin be had for $5 for fifty#--$35 to replace your sand.

If the sand is OK, you lot can as well use Pocono'south DE trick to both better your filtering AND increase your pressure. It's cheap and those of u.s. who use it retrieve it works really well.

Also, as your filter sand ages, it should go dirtier and increase pressure--and filter amend.

Simply some ideas to check. I sure lots of folks take other ideas, too

12:28 PM

Your numbers expect normal to me. I'm running a i.5 HP uprated pump on a 300# sand filter and get about 17-eighteen psi when the filter is freshly backwashed. My pump is oversized for the filter (or the filter is undersized, probably the latter). Your pump may be a fleck undersized but that'due south a much better situation than mine.

What's the flow charge per unit of you setup? What's the turnover time for you pool? I'll bet both are just fine and if so, you lot should be getting great filtering with this setup. If you want to "polish" the water even more than, take Carl's suggestion to add together a scrap of DE.

I would accept expected the PSI to drop if y'all closed off the skimmer or main drain. Information technology sounds as though maybe your new filter PSI guage is non working properly. This is a adequately mutual trouble although not and so much for new filters.

Merely to confirm, you lot did not see PSI modify with either main drain or skimmer but did you set the valve for both main drain and skimmer on? Any alter there? Have you checked to see if in that location is any blockage in the lines. You tin can backflush the lines with a hose and a rag (to seal) or get yourself a Drainking.

Too, near how high is the pad above the puddle? Although this does non add to the full head loss, tiptop volition increase the suction head and decrease the return caput relative to no meridian.

one.5" plumbing is really too small for the suction side and could be primary cause to the air in basket and low PSI reading. Fifty-fifty though you new pump is only 3/4 HP, it is still a very strong pump and mayhap too strong for your plumbing. The pump cannot draw enough water so information technology is drawing air through the seals in the pump lid or valves. A larger pump would just brand this worse so don't become that road. However, a two speed pump would allow you to run at the low speed most of the fourth dimension which your plumbing could easily handle.

If you want to become to the problem of measuring the suction on the pump, you merely need a vacuum guage, Sears has one for $20, and get an adapter so that it can screw into the pump'due south drain plug at the lesser of the basket. But this volition just ostend that your suction head is very high and non actually tell you why.

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