EK-XTOP Dual D5 PWM Serial is a fourth generation high-performance aftermarket DUAL pump top (volute) for D5 type water pumps. The EK-XTOP Revo Dual D5 PWM Serial comes pre-installed with two (2) EK-D5 PWM water pumps operating in series. Using two water pumps in series provides almost twice the head pressure of a single water pump and also guarantees top safety measure – in the case of one pump fails the remaining one will provide sufficient liquid flow to prevent any hardware damage due to overheating. Additionally, there is no downtime until next scheduled maintenance. PWM control allows for automatic pump speed regulation depending on your CPU temperature. Full performance on demand or whisper quiet operation in idle mode! This product features three G1/4 threaded ports which allow for installation of virtually any G1/4 thread fitting / barb. EK recommends EK-ACF series Compression fittings / adapters. Technical specifications: – Motor: Electronically commuted spherical motor – Rated voltage: 12V DC – Power consumption: 2 x 23W – Maximum pressure head: 7m – Maximum flow: 1500L/h – Maximum system temperature: 60°C – Materials: Stainless steel, PPS-GF40, EPDM O-rings, Aluminium oxide, hard coal – Power connector: 2 x 4-Pin Molex- and 2 x 4-Pin PWM FAN connector Operational regime: – PWM duty cycle: ~ 20-100% – Default behavior: Runs at 100% duty cycle when no PWM feedback signal is present Enclosed: – EK-XTOP Revo Dual D5 PWM Serial (incl. 2x EK-D5 PWM G2 pump) – Two mounting clips with rubber insert – Two self-adhesive mounting hole pattern sticker – Mounting mechanism and two mounting plates (incl. required Allen keys) – Installation manual Made in Slovenia – EU!