TRV Heads,HOMGEN Popular 3Pcs TRV Thermostatic Heads Radiator Thermostat Heads M30 x 1.5 Radiator Valve Replacement Heads Radiator Thermostat Valve Head for Home Office Bedroom etc

Description

Description: -For valves with M 30 x 1.5 threaded connections and valves with M 30 x 1.5 threaded connections for radiator manufacturers. -Zero setting ratio upper limit: 0,*,1，2,3,4，5 -It has antifreeze protection and adjustment functions, which can provide adjustment assistance -There is no fixed adjustment range, it is affected by heating temperature and room temperature -You can easily find the required temperature by using the sticky note disc for marking -Head only supplied-valve is NOT included.The package includes:3 * M 30 x 1.5 thermostat Review: My old TRV heads are now 28 years old and I suspect they are not working effectively. I needed 11 replacements and bought three (not those listed here) that looked like they would fit. They didn’t - beware the type with the hexagonal recess in the bottom because the nut on the valve may be wider. It’s a dimension none of the listings seem to give, but turned out to be 18mm on the valve head whereas the nut on the valve is 19mm and they simply would not screw on. Sent them back. The ones listed here don’t have a hexagonal recess and by inspection of the photographs I estimated the opening is about 21mm so I took a chance on three of them. I was right - 21mm - and they fit perfectly. After a day of testing to make sure I can control the radiator temperature with them I have just ordered another 9 (including one as a spare). Review: At least these ones work original ones all not working heating seems more balanced now.