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There are 2 types of seal replacements in the UK - 60% of the time it will be a Waterway wet end where the seal sits in the impellor & the spring assembly sits in the wet end or it maybe the Aquaflo wet end where the ceramic seal sits in the wet end and the spring assembly sits on the impellor - read through and follow the instructions that relate to your type of seal mount. Be careful not to mix up Waterway and Aquaflo replacement procedures.

If your hot tub is equipped with 2 pumps, it is always worth considering replacing both pump seals at this time to avoid the possibility of repeating this procedure in the near future. This information depicts a USA motor being used for demonstration, however the procedure applies also to European motors, (a slight variation in work might apply)

Firstly be aware when working with hot tubs, water and electricity do not mix, this work should alway be carried out by a competent individual. These instructions are for informational purposes only. Poolandspacentre.co.uk does not guarantee that following these instructions will resolve your speciic spa condition, nor do we accept liability for work performed.

How to replace a Waterway Pump Seal

Waterway

 

Before you begin:

Turn power off at the RCD, remove the access door to the equipment area, unplug the motor at the electrical control panel, close the gate valves (if your spa has them, otherwise you will have to drain the spa), next loosen the 2 pump unions, loosen any mounting bolts and remove the pump assembly from the equipment box.

 

1. Tools required are a large flathead screwdriver, philips head screwdriver, and a 1/4” socket.
required tools
loosen back casing 2. Loosen the back casing screw and remove the shroud.
3. Carefully loosen the 4 thru-bolts.  Loosen thru bolts
pull bolts back 4. Pull the bolts back a few inches, but there is no need to fully remove them.
5. Remove the 8 screws on the wet end front face. unscrew wet end front face
remove face plate 6. Remove the front plate. it may require a tap with a hammer a a suitable leverage point.
7. Grab the impeller with one hand. Use the flathead screwdriver to hold the large socket at the other end of the motor. It takes a bit of patience, but you should be able to stop the shaft from turning and loosen the impeller by hand. Do not loosen the socket, just the impeller. remove impeller
remove impeller 8. Remove the impeller and back plate from the shaft.
9. Separate the impeller from the back plate. make a note where the top hat or wear ring is positioned for re-assembly
remove seal from impeller 10. Using a flathead screwdriver, carefully pry the old seal out of the impeller seat.
11. Slightly lubricate the shaft and rubber seal with pump lube or a mild liquid detergent from the kitchen, and install the new assembly as shown. Try to avoid touching the white surface. Use a cloth if need be. replace seal
remove seal from wetend 12. Using the screwdriver again, push the spring assembly out of the back plate.
13. Wipe the spring assembly seat with a clean rag to remove all dirt and debris. clean wet end
14. Slightly lubricate the spring body with pump lube or a mild liquid detergent from the kitchen
15. Push the spring assembly firmly back into its seat. Try to avoid touching the smooth surface with your ingers by using a cloth. replace seal in wet end
16. Wipe the white ceramic disc seat and face of the spring assembly with a clean rag, again to remove any fingerprints or other oils.
17. Remove the large O-Ring, clean its seat, lubricate the ring, and replace. Use a new O-Ring if the old one shows any sign of wear.
check front face o-ring
re-install thru-bolts 18. Reinstall the thru-bolts and back plate.
19. Thread the impeller assembly onto the shaft until it begins to spin. Use the screwdriver again to stop the shaft from spinning, and hand tighten the impeller. thread impeller onto shaft
re-attach front face 20. Re-attach the front plate.
21. Reinstall the shroud.

Reinstall the pump, open the check valves if your spa has them, or refill the spa. Turn the power on at the RCD.

Remember that pumps should only run with water in the spa or there is a risk of overheating the motor.

Pump seals may take time to “seat” themselves, so don’t be surprised if there is a small amount of dripping water for about ½ a day.

Should you require additional information, please call us on 0844 800 3290



Follow the above procedure, but account for the seal & spring assembly placement differences.

 1. The seal has 2 parts. a- White/Rubber part goes in the recess on back of Wetend. Whilst the silver Spring slides on to shaft of Impeller.
2. Press part a of Seal into recess of black
Wetend firmly to accomplish good seal.

 

 3. Slide the spring assembly onto shaft of impeller.
Black ring facing up and make sure the part is slid all the
way on impeller shaft.
4. Place Impeller back in Wetend Housing. Install Wetend back onto Motor.