All About Wetends and Motors

Parts of a Pump/Wetend

Faceplate-Most wetends use style shown. Some use a larger faceplate that includes the volute.
Wear Ring-Your wetend could have a separate floating ring or already built into faceplate.
Impeller-Determines the horsepower of the wetend.
Seal-2 part mechnical seal that stops the wetend from leaking.
Large Oring-Seals the 2 parts that make the body of the wetend.
Volute/Body-Most are as shown but some models have the volute on the faceplate and this is simply a flat piece.

Wetends for spas come in TWO frame sizes.

48 Frame-Once popular is now being phased out. As shown the distance between bolt holes is 3 5/8". The actual size of the wetend can be either size but the location of the bolt hole is what determines frame.

56 Frame-Popular on larger horsepower motors. As shown the distance is 4 1/8".

56f wetends and motors have a larger circumference than 48f. Some wetends have dual holes so they can be used on either size.

Pumps discharge commonly come it one of two ways:

CENTER Discharge-Water output is directly above center of wetend. This is most common wetends rated .5-1.5hp

SIDE Discharge-Water output is to right as shown. This is most common on wetends rated above 1.5hp

"12 o'clock" position is the most common but your pump might be pointed these other direction. 

Its easy to change the pump orientation. Remove loosen the 4 long bolts on the back of the motor that will release the wetend. Turn the wetend to match your needs. Align and tighten the bolts.


115v, 2 speed

115v Motor Wiring

As shown in this example, this is a TWO SPEED motor. Top connection is Common or White Cord Wire. Second down is HIGH SPEED connection. Third is LOW SPEED connection. 
Depending on the manufacturer of the control system is what color cord wire connects here. Most common is HIGH is black cord wire and LOW is red cord wire. But you need to compare to old motor what color cord wire is what speed.

230v, 1 speed

230v ONE Speed Motor

This example shows on the label on left that the motor can operate on EITHER 115v (Low Voltage) or 230v (High Voltage).  We show the most common High Voltage connection. As you see BOTH low and high voltage connect to the same place on this motor. IMPORTANT is wiring INTERNAL to the motor. On the label to the left you see for HIGH VOLTAGE the BLK wire connects to the first lug. WHT to the 3 lug. And BRN is connected to 5 lug which is a insulated pocket or is only connected there to keep the wire from touching anything. 

230v, 2 speed

230v TWO Speed Motor

This example is easy because you only have #2, #3, and #4 lug. #2 is WHITE/Neutral. #3 and #4 depends on your control system. Most are #3 High BLACK cord wire. #4 Low RED cord wire.

IMPORTANT: also note example to left. You may have to change internal wiring as explained. Double check so not to damage the motor.

115v Motor Label

115v Motor Label

a. RPM. Shows this is a 2 speed motor. 
b. VOLTS. Shows this is a 115v motor.
c. FRAME. Shows this is a 48y Frame.

230v Motor Label

230v Motor Label

a. HP. Since this has dashes, it means the motor has a special rating. Usually means its uprated. You will find HP rating elsewhere.
b. Volts. 230v. 
c. AMPS. 2 are shown because this is a 2 speed motor. Amp label can be helpful to judge actual hp rating. A higher AMP rating can indicate a longer operational life.
d. FR. Frame. You use either 48y or 56. Motor frame just match wetend frame or they will not mate.
e. SF. Service Factor. Service factor is a method motor manufactuer balances AMP with horsepower. A service factor of 1 will indicate the motor matches the hp rating. A SF of 1.3 means the motor is over rated for the wetend. Always good. 
In this case the manufacturer gave dashes. That indicates again the motor manufactuer is matching their motor to a specific wetend HP.
f. Label gives which color wires of the cord connect to which spade in the back of the motor.

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