Client called us out today, February 19, 2025 to flush combination boiler both the hydronic and domestic side tech quoted work. Client approved tech drain system, both domestic and hydronic side and flushed both with chemical the domestic with descaling solution, and the combination boiler, hydronic side was flushed with Farox boiler cleaner. Tech let system flush for about an hour hour and a half domestic heat exchanger had some debris, but was in good condition. Home does have a water softener and is functioning properly. The boiler heat exchanger and piping had black fluid coming out due to how dirty it was. This has been the first time it’s ever been flushed. Tech flushed it out with clean water and then repeated with another bottle of Farrox boiler cleaner this time it is much cleaner tech flushed out with fresh, clean water, both hydronic and domestic sides for about 1015 minutes. Once tech was sure there is no more chemical in the system. Tech purged the air and tested system f