RP-1250 Reservoir and Pump

Part No. RP-1250 This product is archived and displayed for information only. It is no longer available for purchase. Released: 04 January 2013

The RP-1250 is a combined reservoir and pump unit which fits into a single 5.25" (CD) bay. Featuring the powerful Koolance PMP-400 pump, it also includes temperature monitoring, a front display, reservoir, pump & fan speed control, and rear G 1/4in threaded fitting sockets. This unit incorporates all-new Koolance electronics, with a 2-line OLED display for deeper user control and feedback.


  • Configure a dynamic fan ramp based on min/max temperature set points
  • Show flow rate in LPM or GPM (optional Koolance flow meter required)
  • Show pump and fan RPM
  • Select only the values you want displayed
  • Adjust alarm and shutdown points independently for all temperature sensors (3 included)
  • Controls a 12VDC pump with 10 user levels up to 2A
  • Fan output up to 2A on each connector
  • Set the safety shutdown relay to normally-open or normally-closed

IMPORTANT NOTE: The pump should never be run dry. Always test this product with coolant.

The RP-1250 has three 3-pin fan outputs. To connect more fans, simply add them together with a wiring harness.

Weight 3.00 lb (1.36 kg)
Fitting Thread G 1/4 BSPP
Max Pressure Tolerance @ 25°C 1kgf/cm2 (14.2psi)
Max Temperature Tolerance 60°C (140°F)
Capacity 237mL (8 fl oz)
Display Type OLED
Pump PMP-400 @ 12V
Temperature Sensors 10K Thermistors
Diagrams / Models (See Files Tab for Diagrams and 3D Models)

Liquid Coolants

Koolance's product warranty does not cover the use of 3rd-party coolants, coolant additives, or corrosion. Koolance LIQ-702 or LIQ-705 coolants are strongly recommended to help avoid issues with mixed metals or biological growth. Additionally, do not use aluminum with bare (unplated) copper or bare (unplated) brass in the same system. Do not use silver with nickel in the same system.