Delivery Pump Replacement Kit
The delivery pump kit includes the pump body, motor, impeller, and in most kits the mounting hardware and tubing connections needed for the swap. Primo sells model-specific pump kits through their customer service department and authorized service centers. Universal 12V DC diaphragm pumps of the correct flow rate and fitting size are also compatible with some Primo models but may not include the specific connector for the Primo control board -- verify before ordering an aftermarket part. Replacement cost is typically $25 to $45 for the OEM kit; professional repair service averages $50 to $80 all-in.
Bottle Probe Assembly
The bottle probe (also called the jug spike or bottle straw) is the rigid tube that penetrates the bottle cap and draws water to the pump intake. Probes can crack from rough bottle insertion or develop a hairline fracture at the base from repeated torque during bottle swaps. A cracked probe causes air infiltration -- the pump runs but draws air instead of water, producing bubbling sounds and very slow or no flow. Replacement probes are model-specific (probe length varies by cabinet height); order by model number through Primo or a Primo-authorized service center.
Silicone Tubing and Push-Fit Connectors
Internal silicone tubing in Primo dispensers is food-grade and rated for the temperature range of both the cold and hot water circuits. Tubing that has developed a permanent kink (often from a bottle being loaded against the tubing run) restricts pump flow and should be replaced. Tubing inside diameter is typically 3/8 inch for Primo systems; purchase food-grade silicone tubing from a plumbing or aquarium supply source and cut to the same length as the original. Push-fit connectors inside Primo dispensers are proprietary -- source replacements from Primo customer service rather than hardware stores.
Float Sensor and Control Board
The float sensor tells the control board when to activate the pump. A stuck float sensor (float stuck in the down position) causes the pump to run continuously, overfilling the reservoir and potentially damaging the dispenser. A float stuck in the up position prevents the pump from activating, leaving the reservoir empty. Float sensor replacement requires opening the reservoir access panel (model-specific location) and swapping the sensor assembly. The control board itself rarely fails -- if you have confirmed the pump motor is good and the float sensor is functioning but the pump still will not run, the control board may need replacement, which Primo customer service can diagnose remotely with the dispenser's serial number.