SRMW2.2G26 RMW2.2G24 Pump Head AR42518 AR42940 AR43061 This is an upgraded head for RMW pumps and the same head as the SRMW pump. The main difference between the RMW pump head an the SRMW pump head are the check valves. They are designed better and will hold up better under pressure making this the better of the two pump heads. Most other parts are the same. .
