How to Replace a Hot Tub Pump
Spa owners should accept the fact that there hot tub pump will fail. The damage of this failure can be much larger than a new pump. Routine inspection of your hot tub pump will help prevent damages. A good spa pump will last 6-8 years so be prepared to replace your older pumps.
A good rule to follow is to inspect your hot tub pump every time you clean your spa filter. You should be checking for water leakage, loud noises and hot pump motors. If you find any of these symptoms then it is time to repair or replace your pump before the pump fails and damages other parts such as the heater.
Water is a sure sign of trouble. Look closely at the spa pump and determine where it is coming from. It may be leaking from the ports and simply need to be tightened or require new o-rings. It may be coming from the motor shaft and pump housing. This is usually a sign of a leaking bearing and will need to be fixed before the bearing fails completely and you have a flood to deal with. Also check the pump housing for small cracks. A cracked housing will get bigger with vibration and should be fixed or a new housing purchased.
If you hear excessive noise you may find it is coming from the pump’s sealed bearing or the motor. If the spa pump bearing is worn, this means the pump is working harder to overcome the worn bearing. It is also a sign that leaks will follow. Take care of this right away! if the pump is making excessive noise then chance are the motor windings are failing and it is time for a new spa pump.
Poor water flow in your spa is generally not caused by pumps. A pump either works or does not work. however the impeller can become clogged or a something might be lodge inside the pump housing. Remove both ports and physically look inside the pump. Check for obstructions. Try and spin the impeller, it should not turn freely as there should be resistance from the spa motor. If you are experiencing poor flow, I would suggest looking at your filter and suctions as the leading cause.
A normal hot tub motor will give off heat under regular conditions. However, you should be able to place your hand on the pump motor. If you find that it is very hot, then there may be internal motor problems. A very hot pump means energy is being wasted and can be costly. The cooler a pump motor runs the more efficient it is.
A spa pump has a starting capacitor that gives it extra juice when starting. If you pump hums and or the main breaker trips then the capacitor may be shot. However, there are a couple other things to check first. Make sure the impeller is free to move and that nothing is lodged. Also make sure no ice has formed inside the pump housing causing the impeller to stick.
If you decide for a new pump, make sure you choose a quality pump. You need to match port sizes usually 1.5″ or 2″. Also you need to determine whether you need a 1 speed or 2 speed pump (check the label). Also you should match the voltage, is your pump 110-120 VAC or 220-240 VAC? Finally, ensure you match the amps listed on your pump with similar amps. Never assume HP listed on the pump is accurate (often used as marketing gimmick by manufacturers), use the Amps rating as a proper guide.
When looking for new pumps consider quality. Remember your old pump failed so try and buy a pump that will last even longer. All manufacturer’s make replacement pumps so don’t feel you need to replace your spa pump with the same brand name. Paying a slight premium can be a great investment versus the cost of a failure! Premium pumps will last longer, run quieter and consume less power.
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