RPK-EXT are compatible with outdoor models, but pump kit must be installed indoors. External recirculation pump designed to function with Noritz's NR8DVC, NR98DVC, SV, and DV heater, They will also function with our new EZ98, EZ111, EZTR50, and EZTR75.
Designed to run off a 3/4-inch return line.
Easy to install - The pump comes pre-assembled with a wiring harness to be easily connected into the water heater.
PROGRAMMABILITY - Re-circulation system can be easily connected into the water heater.