PS-2131 Buna pump seal kit is for select Sundance,Aqua Flo, Sta-rite, Hayward and other brand spa pumps.   5/8" impeller diameter seal kit. 

This spa pump shaft seal kit has shaft size of .625" and also comes with a cup.  If you don't need the cup, then the PS-200 seal will work too. Manufacturer part number 91049000.

Pump shaft seal kits can repair leaky pumps without needing to replace the entire spa pump.

Replaces Emerald 90001900 and 91049000.

Same type of seal kit (BUNA/Carbon) as PS-200 but this one comes with a Lexan Cup.  Without having a picture of the actual seal, we could not determine if your pump has a cup or not, so if you don't end up needing it, it can be discarded if you are unsure.

Need a seal kit/gasket for a different spa pump?  Email us at and we will drum up the right seal kit for your particular pump type.  We offer thousands of discount hot tub parts online and are proud to offer factory original parts - the exact same components and parts used by the original spa manufacturers. 

This pump seal is the PS-200 version with cup called PS-2131.

StaRite Max-E-Glas/Dura-Glas Pumps
Pentair Sta-Rite SuperMax/SuperFlo Pumps
Letro Booster Pump - Old Style
Jacuzzi Brothers Cygnet Series
Jacuzzi J, JCM, K, KM Series Pumps
Jacuzzi L,LC,LCUN2,LT,LX,LTC,LCU,LTCU,LCM,ULCU,ULTCU
Jacuzzi L3 & L25 Model Pumps,Jacuzzi LH & LTH Model Pumps
Jacuzzi LPH,LPC, LTPH Model Pumps   
Jacuzzi LR,LR9, LR3, LR6 Model Pumps   
Jacuzzi LR,LR9, LR3, LR6, & LR25 Model Pumps   
Jacuzzi Magnum Force/Magnum Force 3 Canadian Model Pump   
Jacuzzi Piranha "A" Pump   
Jacuzzi Magnum High Flow Canadian Model Pump   
Jacuzzi SLPH & SLTPH Model Pumps   
Jacuzzi ULSB & ULSC Model Pumps   
TheraMax/TheraFlo Pump Components (1999+)   
Pentair PacFab Challenger High Flow In-Ground Pump   
Pentair PacFab Challenger High Pressure Pump   
Pentair PacFab Dynamo Pump   
Pentair PacFab Pinnacle High Flow Pump   
Pentair PacFab WaterFall Pump AFP75,120,150,180&AF75,120,180   
Waterway Viper 56-Frame 2-1/2" Spa Pump   
Val-Pak/Gecko AquaFlo Dominator Medium & High Head Pump   
Gecko Aqua Flo Flo-Master XP2 48-Frame   
Gecko Aqua Flo Flo-Master FMHP/FMCP Series Spa Pump   
Aqua Flo Tub-Master TMCP Series 100% Drain Bathtub Pump   
Aqua Flo Flo-Master FMVP Series Vertical Mounted Spa Pump   
Gecko Aqua Flo Flo-Master XP2 56-Frame, 6.1"   
Gecko Aqua Flo Flo-Master XP3 56-Frame Pump   
Gecko Aqua Flo Flo-Master XP2 56-Frame, 6.3" Diameter   
Gecko Aqua Flo Flo-Master XP2E 48-Frame   
Gecko Aqua Flo Flo-Master XP2E 56-Frame   
Gecko Aqua Flo Flo-Master XP 48-Frame   
Aqua Flo Circ-Master CMHP/MCP, Center and Side Discharge   
Vico Ultra Flo Pumps 

Regarding the WTC50M LX Circulation pump 220v, this one used to have part number 6500-907 but that part number for the older Aquaflo pumps is now 6000-907 to make room for the new 6500-907. This happened around the summer of 2011 for spas built after that date.   Sundance is also now using Chinese LX pumps in place of the Aquaflo CircMaster on newer models - for these new ones, we don't have the seals because they are not standard US seals.

This pump seal model replaces 2131 , 40716 , 610377040785 , PS-2131 , PS2131 , SP-1720-KA , SPX1250XZ2C , SPX1500KA , SPX1720KA , VG-2131.