PowrLiner part 730-507 is a foot valve housing designed to contain the foot valve assembly in compatible PowrLiner and Epic sprayers and striping machines. This housing provides a secure enclosure for the foot valve ball, spring, and seat, ensuring proper sealing and one‑way flow during the pump intake stroke. Replacing a cracked, corroded, or worn housing restores reliable priming, maintains system pressure, and prevents backflow that can cause hard starting or pressure loss.
| Part Number | 730-507 |
|---|---|
| Part Description | Foot Valve Housing |
| Brand | PowrLiner |
| Fits | PowrLiner 3100; Epic 690 HPG, 660 HPX, 447 HPX |
| Condition | New |
The PowrLiner 730-507 Foot Valve Housing is a precision component that houses the foot valve ball, spring, and seat in the pump inlet. It creates a sealed chamber that allows fluid to be drawn into the pump during the intake stroke while preventing backflow when the pump cycles or is idle.
Over time, exposure to abrasive coatings, chemicals, and normal wear can cause the housing to crack, corrode, or develop internal scoring. A damaged housing compromises the foot valve seal, leading to loss of prime, pressure bleed‑down, and erratic spray performance. Replacing the housing with OEM part 730-507 restores the proper alignment and sealing of the foot valve components, ensuring consistent priming and reliable pressure holding.
| Sealed chamber | Encloses the foot valve ball and spring, creating a one‑way check valve |
|---|---|
| Priming support | Maintains a closed valve to allow the pump to draw fluid from the supply |
| Pressure retention | Prevents backflow when the pump is off, keeping the system primed |
| Cracked / broken | Visible fractures or missing sections that cause fluid bypass |
|---|---|
| Corroded / pitted | Rough internal surfaces that prevent the ball from sealing properly |
| Worn bore | Excessive wear causing the ball to wobble or not seat consistently |
| Loss of prime | Sprayer will not prime or loses prime quickly after shutdown |
PowrLiner part 730-507 is compatible with the following sprayer and striping machine models. Always confirm fitment using the correct parts diagram for your exact model and serial number.
| Model | Component |
|---|---|
| PowrLiner 3100 | Foot Valve Housing |
| Epic 690 HPG | Foot Valve Housing |
| Epic 660 HPX | Foot Valve Housing |
| Epic 447 HPX | Foot Valve Housing |
When replacing the foot valve housing, it is recommended to inspect and often replace the following components to ensure a complete repair and reliable operation.
The ball and seat are wear items that should be replaced with the housing to ensure a proper seal and reliable priming.
The spring provides closing force. Replace if it is weak, broken, or corroded to maintain consistent sealing pressure.
Inspect the inlet screen and any sealing gaskets. Replace if clogged or damaged to prevent debris from affecting the new foot valve.
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