This mechanical seal is the shaft seal for the Davey PowerMaster PM350 pool pump: the pump seal that stops water running along the motor shaft. It fits a 16 mm shaft. It suits pumps using Davey 49021. The same seal fits the PM200, PM250 and PM450. Where the PowerMaster models differ: the PM350 takes a 20 µF capacitor where the PM450 takes 30 µF.
Fits
- Davey PowerMaster PM200
- Davey PowerMaster PM250
- Davey PowerMaster PM350
- Davey PowerMaster PM450
Fits the Davey PowerMaster PM350
A replacement mechanical (shaft) seal for the Davey PowerMaster PM350 pool pump. This seal suits a 16 mm shaft, silicon carbide / silicon carbide faces and suits pumps using Davey 49021. It is the two-part seal that sits behind the impeller: a spring-loaded rotating face on the shaft and a stationary seat pressed into the pump body.
Signs the PowerMaster PM350 seal has failed
- water weeping from the gap between the pump body and the motor
- a rust or mineral trail running down under the motor
- the pump losing prime or drawing air at the motor end
Replace the seal as soon as it starts leaking: water tracking along the shaft into the motor is a common way pump motors lose their bearings.
The same seal is used in the Davey PACR100, Davey PCCR100, Davey PCCR150, Davey PowerMaster, Davey PowerMaster PM250, Davey PowerMaster PM450.
Before you order
Check the old part before fitting: match the size of your old seal.
Measure the shaft where the seal sits and compare the old seal face-to-face with the photos.
Capacitor details for this pump: Davey PowerMaster PM350 capacitor guide.