*PLUMBERSSTOCK EXPERT* responded:
Hi! Thank you for inquiring with us. Yes, this is the assembly replacement for the Ridgid KJ3000. The Ridgid 66122 is a complete pump (3,000 PSI). If you're interested in purchasing the Ridgid 66122, just click the "Add to Cart" button, enter your zip code and you'll be all set. Thank you for visiting PlumbersStock.com. Have a great day!