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The U.S. Department of Energy (DOE) is considering revising the test procedures for pumps to include new subcategories of pumps, specifically circulator pumps and small vertical in-line pumps. On February 3, 2016, DOE published a notice of intent to establish a working group for circulator pumps. The working group met to address potential energy conservation standards for circulator pumps and subsequently voted to approve recommendations related to energy conservation standards, applicable test procedures, labeling and certification requirements for circulator pumps and small vertical in-line pumps. DOE is restarting this rulemaking and will consider new definitions, a new appendix B to subpart Y applicable to circulator pumps, revisions to appendix A applicable to small vertical in-line pumps, and applicable sampling and enforcement procedures.