Emaux 6021013 Maximum 40PSI Indication, Plastic Casing with Bottom Connection/ Plastic Pressure Gauge with O-Ring is for use with the following filters and valves.
Max Series Top Mount Filter Model: MFV17, MFV20, MFV24, MFV24B, MFV27A, MFV27, MFV31A, MFV31, MFV35
P Series Filter Model: P650, P700
FSP Series Compact Filter System Model: FSP300-4W with ST020, FSP300-4W with ST033
Top Mount Multiport Valve Model: 1.5 inch 4-Way Top Mount Valve (MPV05)
Top Mount Multiport Valve Model: 1.5 inch 6-Way Top Mount Valve (MPV01)
Top Mount Multiport Valve Model: 1.5 inch 6-Way Top Mount Valve (MPV07)
Top Mount Multiport Valve Model: 2 inch 6-Way Top Mount Valve (MPV02)
Top Mount Multiport Valve Model: 2 inch 6-Way Top Mount Valve (with Turn-Lock Lid) (MPV08)
Top Mount Multiport Valve Model: 2 inch 6-Way Top Mount Valve (MPV11)
Side Mount Multiport Valve Model: 1.5 inch 6-Way Side Mount Valve (MPV03)
Side Mount Multiport Valve Model: 2 inch 6-Way Side Mount Valve (MPV04).