Just had pool opened. They turned port dial to 2

If return inlet fittings are STRONG with plenty of water returning, then that means water is being sucked from somewhere else in addition to your weak skimmer, Right?
So that means you must have another point of suction somewhere that is also open, especially with knowing, that suction at skimmer is weak!
To increase suction at any one point, close down other suction ports. In your case probably a second skimmer that is "tee, d" together, then in which case you will need to physically plug that openings suction port, if there isnt a valve to do so. Or your bottom main drain is open ?

if you have the intex kit , it comes with instuctions but hers it ina nut shell , find adaptor plate that fits inside skimmer (flat thing with hose port in middle) assemble sustion head and handle with hose attached and drop into pool (keep handle out) fill hose full so it sort of sinks (no air gaps) snake carefully end of hose over to skimmer (pump running normal) fit plate into skimmer quickly snake hose thru skimmer hole and fit to plate adaptor on hose port , wait a few minutes if flow continues out pump dishcharge then your good to go if not dissasemble and start over , but let filter pick up prime again 1st , do not lift head out of water even to get big stuff off pickup do it in the pool under water

if this is a inground try only the main drain if it works something is in the skimmer line

The pump does not need to be on during the fill process. You don't need to turn the pump on until the water level gets to the middle of the skimmer. The skimmer pulls water out of the pool to power the pump. It then goes through the filter and out the returns (jets) into the pool. If there is not enough water going to the pump (through the skimmer), the pump will run dry and burn up.

the trick is to start with the pump pulling from the main drain, you will see air pocket in the pumps basket (most cases) turn the valve back slowly towards the skimmer as soon as you see the air pocket disappear, You have the perfect blend between the two sources. and a happy pump.
Jay the pool pump motor repair guy Longwood Florida

You should take your vacuum hose and plug it into the hole in the bottom of one of the skimmers. Fill the hose with water first or your pump will loose suction. I fill my hose by putting the head of the vacuum in the pool. Take the other end and hold it over a pool's discharge port (where the water comes back to the pool from the pump. When the air bubbles stop, put your hand over the end of the hose and move it to the skimmer and connect it.

That work for you?

Thanks fo your visit today.

Thank you for posting your question here on Fixya.com.

It happens because you are introducing a lot of air into the suction line when you attach the vacuum hose. Once the pump draws that air thru and expels it you should go back to normal pump flow in order to vacuum. To help eliminate this problem, place the vacuum under the water and take the end of the hose you will attach to the skimmer and place it over a return outlet. This will fill the hose with water and force most if not all the air out. Attach the hose to the vacuum plate and vacuum away.

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John

it sounds as if your skimmer is leaking, either from the plastic body, or from the faceplate gasket. to confirm this, shut off you pump and let the water settle. put your garden hose in the pool so that water is being added. get a container of food coloring, and slowly disperse it around the faceplate, and inside the body of the skimmer, and see if it gets drawn in anywhere. this will indicate your leak location. then call your installer, 2 weeks is unacceptable! good luck!

Ok the first on the PSV valve. the 1/2 position should really be 1+2. You have two linlets to your pump. One from the skimmer and one from the main drain in the floor of the pool. When you select port 1 it will be one or the other perhaps 1 would be skimmer and 2 would main drain. You can select one and see if the flow stops in the skimmer. That will tell you which is which, depends on how it was plumbed. Position 1+2 combines the two flows. I normally select both, If my pool gets a lot of grass and leaves, I select skimmer only or when I vacuum. I select main drain only when there is more debris at the bottom. OK recirc is only recirculating within the piping system bypassing the filter. You can dowload a complete manual of your filter and components from www.haywardnet.com. Green water: Ok your chemicals are right? Free Chlorine, total chlorine? hardness, calcium, pH, alkalinity? Well most pool companies want you to buy some algaecide and that can't hurt, but I'd shock your pool if it's dark green I'd put it 4-6 gallons of liquid chlorine, if its light green 2-4 gallons. This is when I'd use recirculate. Allow this to mix without filtering for a couple of hours. Turn the pump off and allow to set overnight. In the morning you should have much clearer water, with green slime sitting on the bottom. Vacuum this to waste very gently so as not to remix algee.IF this doesn't work you'll need som floculant and repeat the opeation folling the directions on the floculant Restart filter, keep chlorine level high above 5-10ppm for a day or two and keep filtering. If it is still cloudy now,add some filter aid. In hot weather, don't let that free level go below 4ppm. Don't allow anyone to swim while chlorene level is high. Be sure to us test strips that indicate free and total chlorine.

When backwashing or rinsing the same water is used as in filtering.(skimmer and main drain) so I don't think skimmer damage is the issue. Check if the pool water is low at the skimmer after the backwash cycle, Also check to see if the skimmer weir gate (flapper) is stuck in the upright position. I would suggest 2 main checks. Fill the pool higher than usual, back wash, ensure the pool water level is 1/2 way up the skimmer level and try again. Also, if your lines are valved right, shut off the skimmer during the filter cycle and see what happens. Lastly, the gasket on your multi-port valve may be bad.