Question about Hayward Northstar Dual Speed Max Rate 2 Hp Pump

1 Answer

Hayward Northstar 3 HP pump for waterfall too noisy

I have a pump that is way too loud! I've rebuilt the motor, changed out the impeller, slip ring and all o-rings but nothing seems to help. I also put a valve on the outlet side of the pump to create some back pressure since the system is not filtered. It helped a little bit but you cannot restrict the flow too much before the pipes start shaking. Any ideas????

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 990 Answers

Did you put the slip ring in with the wide end out? This slides foreward when the pump runs and seals the presure side of the impeller from the suction side. If this is not right it can create a lot of cavation noise. I don't know how long this has been a problem but if you just put this in a 3hp pump is a lot and will need a 3" suction on most runs and at least 2.5" on the presure side depending on the run. I hope this helps.

Posted on Oct 05, 2009

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Where sale a impeler for beckett w3500.

Or if Home Depot can't help you in ordering an impeller for a pump they carry, try sending an email directly to Beckett and ask for assistance on where to get one...

Good Luck

May 09, 2014 | Beckett Corporation Beckett W3500 7114310...

1 Answer

Waterfall pump hums but won't pump

this sure sounds if the impeller is blocked and not being able to turn ,Dont let it run this way , can dammage motor of pump , remove intake cover (unplugged) and wash out with garden hose real well , see if impeller (black plastic blade) can turn with your finger (unplugged) , should move easy ! this might be an indacation of need for a filter on pump inlet !!!

Oct 14, 2012 | Little Giant Submersible Fountain Pump

1 Answer

Lid won't close. Seems like the o-ring diameter is too big but it is the part leslies gave me for this specific pump.

O-rings are pretty easily mixed up in stock. Leslie probably did give you the wrong size. If you still have the old one, you can easily compare them. Stretch the two of them simultaneously between two pencils or screw drivers to see if the inside diameters are the same. If one is smaller is will stretch out straight before the larger one does. To check the thickness, lay them adjacent to each other on a nice flat surface and put a straightedge across them, it will be pretty easy to see if the straightedge tips a bit. Good luck, Al K

May 22, 2011 | Hayward Northstar Pool Pump Lid Cover...

1 Answer

My Hayward Tristar 1.50 HP pump is 3 years old, and recently developed a high-pitched humming noise that is causing a noise disturbance. The performance seems to be operating okay, but it never used to...

sounds like the bearings are going out on the motor. The noise will increase as they wear out more until it locks up and throws the breaker. You can have the motor rebuilt or just replace the motor. Consult a pool professional to help out with this.

Nov 22, 2010 | Hayward TRISTAR PUMP 1.0 HP, 115/230V

1 Answer

High pitched sound coming from hi-flo 48 frame pump. why?

Sounds like the bearings are going out. There should be a series of bolts or screws connecting the motor and seal plate to the rest of the pump. If you separate these you can pull the motor back and get a better look a the impeller. Check and make sure there is no debris clogging the impeller or rubbing inside the diffuser/impeller area. This can also cause noise in the pump. You can try running it for a few seconds while it's open, and if it's still real noisy then it's the bearings. You can either replace the motor, or have it rebuilt. most local pool supply shops can check it and rebuild it for you. if they don't do that kind of work chances are they can refer you to a plce that does.

Sep 19, 2010 | Waterway Above Ground Hi Flo Pump

1 Answer

My flotec 4/10hp waterfall/utility pump was working fine for about 1 hour, now it's only humming and not pumping any water... ?

Clogged, Impeller loose and not turning. Remove strainer from bottom of pump and check for clogg and see if the impeller is turning.

Sep 21, 2009 | Flotec 4/10 Hp 3000 Gph Waterfall Utility...

1 Answer

I have a Hayward Northstar 2HP pool pump. I need

If the motor still runs at all start the pump with the lock off and it will pop out. If not use some liquid soap and a small straw like a capalery tube on wd. Any thing small enough to fit through the space you can get when you pull the seal plate back, their is an inner plate with an "O" ring and you need to get the soap to that then let it sit for half hour or so and go back to the side to side prying when the soap and the "O" ring come together it will slide right out.

Sep 20, 2009 | Hayward Northstar Dual Speed Max Rate 2 Hp...

1 Answer

5yr. old Northstar 2hp, humms at start up and then pops breaker.

capacitor maybe hard to tell must be check but the cheaper option will the capacitor check for loose wires

Sep 01, 2009 | Hayward Northstar Dual Speed Max Rate 2 Hp...

1 Answer

I'm replacing the impeller and seal assembly on a Hayward 3/4 HP Max-Flo pump as the original impeller broke at the shaft. I had to remove the impeller thread assy. inside the seal by splitting it as there...

First remove seal plate and mounting plate on motor. The front end bell of the motor is alunimun and is probally corroded, you will need to scrape most of this corrosition off the front of motor and then wire brush this clean. A coat of paint will not hurt at this point or coat or coat in a good pool lubricant to stop corrosion in the future. This calcium will build to the point of warpin seal plate and tweaking impeller shaft and it will quite often crack the seal also. As far as reassembly hand tighten only. If the pump has the motor it came with you have to shut the power off at the breaker and carefully use a 3/8 open end wrench to hold the back of the motir shaft. If the motor has been replaced you will need to check with the manifctuer.

Aug 13, 2009 | Hayward 3/4 HP Max-Flo High Performance...

1 Answer

Pump does not turn on except for a humming sound and shuts off jumping the electric breaker

This could be anything from a stuck impeller to bad windings in motor. If you open the pump at the lock ring and remove the difusser from the impeller you can see if you can spin the impeller, If it won't move is it something holding the impeller up remove it. If notit is probally a bad bearing and you should replace the motor. If the Impeller turns try turning it on and caerfully try to spin before it kicks the breaker. If it is sort of stuck and does not want to turn the motor is bad and needs to be replaced. If it spins and won't start same thing, If it spins and starts it is probally a start capicator. Shut the power off at the breaker remove the back of the motor the capacitor will be a small black or silver cylinder with 2 or 3 wires clipped to it. Remove this and take it to a motor shop and get an exact duplicate. and that should fix it. When putting back together be sure to lube all "O"rings and refill with water. Hope this helps.

Jun 02, 2009 | Jacuzzi MAGNUM POOL PUMP 1-1/2 HP MAGNUM...

Not finding what you are looking for?
Hayward Northstar Dual Speed Max Rate 2 Hp Pump Logo

244 people viewed this question

Ask a Question

Usually answered in minutes!

Top Hayward Fountains & Ponds Experts

Rich Florenzen

Level 2 Expert

333 Answers


Level 2 Expert

101 Answers


Level 3 Expert

3018 Answers

Are you a Hayward Fountain and Pond Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides