Pride Plumbing came out and provided a cost estimate to either rebuild or replace a leaking Zurn 975XL3 reduced pressure zone (RPZ) backflow. A rebuild would require us to, after shutting off the water, remove and replace the unit's cap, relief valve, check valve #1, check valve #2, and all rubber O-rings and gaskets. A replacement would require us to, after shutting off the water, remove the defective backflow; install the new backflow assembly with new gaskets, bolts and nuts; and test it for leaks and proper operation. Once the RPZ assembly passes inspection, we will file the certification paperwork with the appropriate agencies.