How to discharge that sewage from the horizontal hot water boiler
(1) opening the valve for the discharge of sewage on the inside;
(2) slowly open the valve of the outward discharge sewage, carry out the preheating pipeline and discharge the sewage;
(3) switch the valve to discharge sewage back and forth, slowly wash the water stains and dirt in the pot, so that the water stains and dirt can be discharged as hard as possible;
(4) close the inner discharge valve and discharge the water stored between the two sewage discharge valves; (5) close the outward discharge valve and complete the sewage discharge.
