The Onga Leisuretime LTP400 pool pump takes a mechanical seal for a 1/2″ shaft (about 12.7 mm) with carbon / ceramic faces. Our aftermarket CapacitorsNZ seal to suit it replaces Onga part 702789 and Davey 48802SP. The Leisuretime LTP550 and LTP750 are listed for the same seal. Compare it with your old seal once that is off the shaft to confirm the size before fitting.
Signs the LTP400 seal has failed
A shaft seal wears gradually, so the first sign is usually small. Look under the pump where the wet end meets the motor.
- Drips or a damp patch at the joint between the pump body and the motor, often worse while the pump is running.
- White crust, salt build-up or a rust streak below the motor end.
- Air bubbles returning to the pool, or the pump struggling to hold prime, because a worn seal can pull air in as well as leak water out.
- A squeal or rumble from the motor, which can mean water has already reached the bearings.
Part numbers this seal replaces
The Onga number for the LTP400 seal is 702789, and the same seal is also referenced as Davey 48802SP, so either number on an old packet or parts list leads to this part. On the pump itself, the model code reads LTP400 or LTP 400. This is an aftermarket CapacitorsNZ seal, not an Onga or Davey product. The same seal is also sold on its own as our 1/2″ shaft seal to suit Onga Leisuretime and Davey X-series pumps.
Which pumps use the same seal as the Onga Leisuretime LTP400
These pumps have their own seal listing: Davey XP Series, Onga Leisuretime LTP550, Onga Leisuretime LTP750 and Onga Pantera PPP550.
It is also listed for the Davey 105, Davey 135, Davey Aqua-mate 350 and 450, Davey Celsior bath pumps, Davey HP Series, Davey Power Chief 85, Davey XA85, XA105 and XA135, Davey XB 73101 to 401, Davey XD Series, Davey XF Series, Davey XS Series spa pumps, Onga 200 Series spa pumps, Onga 400 Series, Onga 4145-1, Onga BR463-465 pool pumps, Onga JJ400, Onga PPP750-2 and the Wallace Hydrojet 35, 50 and 70.
Fitting a new seal to the LTP400
A 1/2″ shaft measures about 12.7 mm across, so check it with calipers where the seal sits. Clean the seat bore in the pump body before pressing in the new stationary seat, and keep fingers and grit off both polished faces. Use water or a little soapy water to ease the rubber parts into place, not grease or oil. Once it is back together, fill the pump with water before switching on, because running a seal dry, even briefly, can overheat and damage the faces.
If the motor also growls or the shaft feels rough, the LTP400 service kit pairs this seal with the LTP400 motor bearing set for one strip-down. Parts for other Onga pumps are on our Onga page.
Before you order
Check the old part before fitting: match the size of your old seal.
Capacitor details for this pump: Onga Leisuretime LTP400 capacitor guide.