

PowrLiner / PowrTwin part 236-031A is an outlet valve housing designed to contain the outlet valve assembly on compatible sprayer models. This precision-machined component houses the valve seat, ball, and related components, providing the structure necessary for proper outlet flow control and pressure maintenance. Replacing a cracked, worn, or damaged outlet valve housing restores proper valve operation and ensures reliable pump performance.
| Part Number | 236-031A |
|---|---|
| Part Description | Outlet Valve Housing |
| Brand | PowrLiner / PowrTwin |
| Fits | PowrLiner 4955, 6955, 8955; PowrTwin 12000 Plus DI, 12000 Plus, 4900, 6900, 8900 |
| Condition | New |
The 236-031A Outlet Valve Housing is a precision-machined component that contains the outlet valve assembly on compatible PowrLiner and PowrTwin sprayer models. It houses the valve seat, ball, and related components, providing the structural foundation for proper outlet flow control and pressure maintenance.
The outlet valve housing is critical for maintaining proper pump function. It creates the chamber where the outlet valve ball seats against the valve seat, forming a one-way check valve that allows material to exit the pump during the pressure stroke while preventing backflow during the suction stroke. The housing must maintain precise internal dimensions to ensure proper ball movement and seating, and it must withstand the pressures and chemical exposure of the spraying environment without leaking or degrading.
Over time, outlet valve housings can become cracked from stress or impact, corroded from chemical exposure, or worn at the sealing surfaces and threads. A damaged housing can cause pressure loss, backflow issues, and external leaks, leading to reduced pump efficiency and material waste. Replacing a worn or damaged outlet valve housing restores proper valve operation, ensures reliable pressure maintenance, and prevents fluid leaks.
| Component containment | Houses the outlet valve seat, ball, and related components |
|---|---|
| Flow control | Provides the chamber for one-way outlet valve operation |
| Pressure maintenance | Creates sealed environment for maintaining system pressure |
| Pressure loss | System cannot maintain operating pressure |
|---|---|
| Backflow issues | Material flows backward through the outlet valve |
| Cracks / damage | Visible cracks compromising housing integrity |
| External leaks | Fluid escaping from housing seams or fittings |
Part 236-031A is compatible with the following sprayer models. Always verify fitment using your equipment's parts diagram before ordering.
| Model | Component |
|---|---|
| PowrLiner 4955 | Outlet Valve Housing |
| PowrLiner 6955 | Outlet Valve Housing |
| PowrLiner 8955 | Outlet Valve Housing |
| PowrTwin 12000 Plus DI | Outlet Valve Housing |
| PowrTwin 12000 Plus | Outlet Valve Housing |
| PowrTwin 4900 | Outlet Valve Housing |
| PowrTwin 6900 | Outlet Valve Housing |
| PowrTwin 8900 | Outlet Valve Housing |
When replacing the outlet valve housing, these associated components are often inspected or replaced at the same time.
The seat that the valve ball seals against; inspect for wear or damage.
The ball that seals against the seat; inspect for pitting or flat spots.
Gaskets that seal the housing; replace if worn.