Check the listing for details. Gravity Brake for Direct Pump Installation. Condition: New. Listed at 32.91 USD. Gravity brake for direct pump assembly Gravity brake thermostop for heating pumps Gravity brake for direct connection to heating pumps The gravity brake is screwed to the thread of the heating pump and the pump screwing parts can be used again Prevent unwanted circulation even when installing several pump circuits For use in heating, solar and cooling systems For the noise of automatic heating systems High operating pressure: 13 bar High temperatures: 130 degrees The gravity brake is offered in three versions: R 1 "exit and entry (matching the heating pump 15 with 1" thread) R 1 1/4 "Exit and entry (matching the heating pump 20 with 1 1/4" thread) R 1 1/2 "Exit and entry (matching the heating pump 25 with 1 1/2" Thread) R 2 "Exit and entry (matching the heating pump 32 or 30 with 2" th.