Pool pump impeller

It has been about 5 years since we 'serviced' our pool equipment. We really haven't used the pool that much but we would like to this year. If I shut all the valves in the system and open the filter basket cover, water still flows out so I must have a bad valve somewhere. I need to replace the sand in the filter and have already ordered new laterals just in case I need them.

When I run the pump and use it in vac mode the pressure is really low. At one point years ago the suction was so good at times the vac almost stuck to the bottom of the pool. Now maybe half of the dirt on the bottom is sucked up and the other half forms a cloud around the vac had.

Last week I stuck a hanger in the area of the impeller and did manage to get a few small leaves out. The pressure went from 10 to about 12 afterwards. So I'm thinking I might try and have a look at the impeller. I would like to have a new impeller on hand in case it is needed. Our pump is an Emerson JJ1002-1 1HP square flanged pump. It is at least 10 years old and maybe 20 years old. I did have it 'rebuilt' about 5 years ago.

I can't find anything like our pump on the internet. Our pump says made in Mexico. Are all 1HP square flanged pumps kind of similar ? Do you think there is perhaps a generic impeller I can use ? Is Emerson the same as some other brand of pump ?

 

Unfortunately that number only brings up the motor.... not the pump.
I know Marlow pumps.
I would say the impellers are not interchangeable and you may need a gasket/seal kit once the pump is pulled apart.

Maybe post a picture or two of the pump.

 

Hmm - what is the difference between the motor and the pump. Is the pump the piece with the basket ? There are no marking of any kind on that piece. Here are a couple photos of my equipment.

Edit : Is the impeller considered part of the motor or part of the pump ? If I were to remove the 4 screws of the flange should the motor pull away leaving the basket part holding the water ?

 

The motor is to the left of the yellow line. The pump is on the right.
The impeller is mounted to the motor shaft but is considered part of the pump.

Looks like a Marlow pump but their baskets are only two knobs.
I'm checking further.

 

Thanks.

If it helps - the basket (and the back plastic housing) are not square. One length is perhaps 1 inch shorter than the other.

Edit : True we have inherited a mix of equipment after 20 years - but the sand filter is a Jacuzzi. A lot of the other pool equipment is Hayward.

 

I just went out to the pool room. We have an identical pump (except for the four screws) for the spa jet right next to the one I have pictured. There are no markings on it either except for a small piece of hard plastic which says "Fill with water before starting pump". I'm sure that label fell off the other pump at some point.

I'll bet these pumps are old Hayward pumps. I'm looking at google images...

Edit : Just tried calling Hayward customer support - closed for the day.

 

You should always add water to a pump's volute before starting it.
The water is what the seal uses for lubricant.

This is a typical Marlow pump. It's what I have. Mine is around 30 years old and looks identical.
You can match its parts to yours. The biggest difference is the 2 vs 4 cleanout lid knobs.

The red plugs are for winterizing/draining the pump.

You said you had it rebuilt.... who did it ?
I do mine in the winter when it's not needed.
I have many parts for standard Marlow pumps but they do have some differences too.

 

I just did a search on "1hp marlow pool pump" and one of the images is this - which is IDENTICAL to my pump. (I should have mentioned the 4 raised plastic bands near the bottom).

Unfortunately - this is from an expired ebay listing with no description.

The guy who last serviced my pump is just getting over covid. We have some friends and this guy also does work for our friends. (These people are ultra careful). He tested negative and shortly afterwards visited our friends. Now three people in that house have covid... I think I'll hold off contacting him for the time being.

Thanks for your help. I think tomorrow I am going to see if I can play with all the valves and see if I can somehow drain the water from the pump compartment. I have one of those cheap endoscopic cameras. Maybe I can get a look at the impeller and see what it look like. If I can get the water out of the pump maybe I'll take out the 4 screws and separate the pump from the engine.

 

If your pump is similar to the one in the last picture.... just take out the two drain plugs.
Technically the one on the right side is for the pump.

 

Unfortunately - if I close all my valves and remove the basket lid, water flows over the top of the basket area. Maybe I'll make a post over in the plumbing area on this site on "how to service 1 1/2" boston brand valves".

Edit : I'm long retired, but I should have been a detective.
The defunct ebay listing did have a UPC code.
I found a upc search engine : https://www.upc-search.org/?q=0663001730378
And it came up with an old Amazon page : https://www.amazon.com/gp/product/B0.../?tag=gnugk-20
(Of course without your 'marlow' key word I would have gotten nowhere).

"The Precision Pump was designed to go head to head with the Hayward Super Pump performance. The inlets and outlets are in the exact same position as the Super Pump, this pump has 2" inlet and outlet, but the pump comes with (2) 1-1/2" reducer bushings to match the Super Pump fittings...."

 

Oh....ok. So your filter is below the pool water level. If the valves don't seal you'll get a constant flow of water. My filter is several feet above the water level. I've removed all those valves and installed ball vales.

 

Yes - all my valves are brass ball valves. Problem is they are old (you hear kind of a grinding noise when you turn them) and there are many of them (main drain, surface, pool sweep, spa ...). And all of the tubing is brass as well. I'm ok with pvc but not so much when it comes to brass fittings.

And yes - the pool room is under the pool.