I got my new Four Season 74850 heater valve. The only difference is the barb fittings are slightly larger than the stock valve but the hoses fit nicely after pushing them on.
The first thing I did was loosen the two screws on the back of the heater valve assembly.
After removing the two screws, carefully remove the actuator's level from the lever arm of the old heater valve. There will be a yellow plastic bushing that you will need to keep to reuse when installing the new Hester valve.
After removing the old heater valve, remove the screw holding the lever arm in place and switch it over to the new heater valve. You will need to remove the lever arm off the new valve as it is different but reuse the new Phillips screw as the threads in the new heater valve are suited for that screw.
After placing the old lever arm on the new heater valve, screw in the new Phillips screw to hold it on. There is only one way that the lever arm is supposed to fit in the heater valve and there is a certain shape on the lever arm and heater valve that will need to be matched up before putting the screw on. Make sure the lever arm is seated properly.
Line up the heater valve on the bracket to the corresponding holes that were previously in use, making sure the arrow on the heater valve is pointed down. At this time, place the yellow bushing on the actuator's arm and fit it into the lever arm of the heater valve.
Screw in the Phillips screws on the back of the bracket and put in the hoses and enjoy your new and cheaper heater valve.
