Seal Insert, Copper - J3-2-50



Part # 5056-07A

By Pentair Pool Products

  5 Average  



Part # 5056-07A

Manufacturer Code J3-2-50

Dimensions 1.3" X 2.25"

Alternate Part #'s 351021025, 40720, 788379739072, J32, STA-101-3726, STA1013726

Product Description

Copper seal insert for a Sta-Rite Dura-Glas and Max-E-Glas pool pump.

Frequently Bought with the Copper Seal Insert

Shaft Seal 5250-100

RTV Silicone 80050 (For gluing copper cone into seal plate)


?     Asked on 5/23/2019by Mark

what is the outside diameter off the small area that seats in .and what seal goes with it ? 5/8 shaft

A  Answered on 5/25/2019 by InyoPools Product Specialist Patrick P.

Hi Mark, We are checking on the dimension now and will reply back when we have that measurement. Here is the Shaft Seal that goes with this insert. We have a Video on Determining Your Shaft Seal and Copper Insert which might find helpful.

A  Answered on 5/27/2019 by Industry Professional

Some pumps took this heat sink ans some didn't make sure your pump needs this.

A  Answered on 5/28/2019 by Industry Professional

There is only 1 application for this copper insert. If you have a StaRite Maxi/Dura Glass pump prior to 1998 this is correct.

?     Asked on 8/10/2018by tom c

Is this the correct part for a STA-RITE Pool Pump Seal Plate Part # C103-137p

A  Answered on 8/10/2018 by InyoPools Product Specialist Lennox H.

Hi, Tom C. Yes, this Copper Seal Insert will fit C103-137P. 

?     Asked on 9/23/2017by Don

Do you need to use the copper insert with seal kit GO Kit6? for pre-98 Dura Glas pump?

A  Answered on 9/25/2017 by InyoPools Product Specialist Stacey M.

Hello Don, Yes you do need the copper insert for this gokit.

?     Asked on 8/10/2017by Inyo Visitor

Can I use any silicone sealer when installing this part?

A  Answered on 9/1/2017 by InyoPools Product Specialist Stacey M.

Hello, a little silicone sealer is used on the outside to keep it in place.

?     Asked on 4/22/2016by David

Do you have installation instructions for the copper insert? Thanks.

A  Answered on 4/24/2016 by InyoPools Product Specialist Lennox H.

Hi David, We do not have installation instructions for this part. However, it's pressed into the seal plate and a little silicone sealer on the outside to keep it in place.


Est. Repair Time

1 to 2 hrs

Tools Needed

Screwdriver, Socket Set, Wrench Set

1     0

Pump was making noise and seal was leaking.

Written on 6/24/2019 by Guest

Shut off pump.

Drain water from suction by opening drain plugs on bottom of pump body and trap body.

Remove clamp around pump head.

Move motor and seal plate from pump body.

Unscrew 5 screws holding diffuser to seal plate and remove diffuser.

Loosen screws holding motor cover to motor and remove cover.

Place 7/16" open end wrench on motor shaft flat.

Remove impeller by turning it counter clock wise.

Remove 4 screws holding seal plate to motor and remove seal plate.

The copper seal insert was broken and no longer attached to the seal plate.
Place seal plate on flat surface and tap out ceramic seal seat using socket and hammer.

removed the remaining portion of the copper seal insert with a larger socket.

Cleaned seal cavity with soap and water.

Apply thin layer of non hardening permatex to insert cavity,
Place card board washer in bottom of copper insert. Using 1/2" pipe coupling, gently tap insert into cavity.

Wipe off excess permatexfrom seal plate and sopper insert.
clean seal cavity in insert.

clean and polish surface of ceramic seat with clean cloth (microfiber).
wet edge of "o" ring with liquid soap.

using finger, press seat firmly and squarely into seal cavity.

clean motor shaft with some wet sand sand paper to remove corrosion. Clean up with liquid soap.

reinstall seal plate onto motor shaft by first applying some soap to the seal (shaft side). Then slide the seal plate onto the shaft until the rubber drive ring hits the shaft shoulder.

Screw impeller on shaft (clockwise) using 7/16" open end wrench on motor shaft flat.

Reinstall motor cover screws.

Attach seal plate to motor with 4 bolts. Do not over tighten.

Reassemble diffuser by finger tightening the 5 screws (not too tight)
Install "o" ring on diffser.

Install "o" ring pump head.

Install seal plate and motor to pump head, reinstall clamp around both and tighten clamp.

Fill pump with water.

Install suction trap cover and start pump.

Project complete. No leaks, no noise and is pumping.

Were these instructions helpful? 


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