OEM replacement upper housing for the SHURflo® PowerTwin 12-volt diaphragm pump (model 4111-035). The upper housing contains the valve assembly and forms the pump head where fluid enters and exits. Replace when the housing is cracked, stripped at the port threads, or damaged beyond sealing. Fits PowerTwin models only — not compatible with 2088 Series pumps. Housing only — valves and pressure switch sold separately (see parts 94-232-05 and 94-230-40).