SprayTech part 0507690 is a bypass valve assembly used in a wide range of airless paint sprayers. It regulates pressure by diverting excess paint back to the inlet or hopper when the gun trigger is released, helping maintain consistent spray pressure and preventing motor overload.
| Part Number | 0507690 |
|---|---|
| Part Description | Bypass Valve Assembly |
| Brand | SprayTech / RentSpray / Impact / Advantage |
| Fits |
|
| Condition | New |
The SprayTech 0507690 Bypass Valve Assembly is a critical hydraulic component that manages pressure during sprayer operation. When the spray gun trigger is released, the bypass valve opens to recirculate paint back to the pump inlet or hopper, allowing the motor to continue running without dead‑heading the pump.
A worn, stuck, or leaking bypass valve can cause pressure fluctuations, difficult starting, or failure to build pressure. Symptoms include surging at the gun, loss of prime, or the sprayer failing to cycle when the trigger is pulled. Replacing a faulty bypass valve restores proper pressure regulation and extends pump life.
| Pressure relief | Diverts paint flow when gun is off to prevent pump overload |
|---|---|
| Maintains prime | Keeps paint circulating so sprayer is ready to spray immediately |
| System protection | Prevents excessive pressure buildup that can damage seals and hoses |
| Pressure surging | Spray pressure fluctuates wildly with trigger on or off |
|---|---|
| Loss of prime | Sprayer won't build pressure or loses prime repeatedly |
| Stuck valve | Valve won't seat – pressure never builds; or won't open – motor stalls on trigger release |
| Leaking / weeping | Paint leaks from the valve body or around the adjustment knob |
SprayTech part 0507690 is compatible with the following models. Always verify fitment using the correct parts diagram for your exact model and revision.
| Model | Component |
|---|---|
| SprayTech LCX 750 | Bypass Valve Assembly |
| SprayTech LCX 130 | Bypass Valve Assembly |
| SprayTech LC1600 | Bypass Valve Assembly |
| SprayTech GPX1600 | Bypass Valve Assembly |
| SprayTech GPX1250 | Bypass Valve Assembly |
| SprayTech GPX 750 | Bypass Valve Assembly |
| SprayTech GPX 220 | Bypass Valve Assembly |
| SprayTech GPX 165 | Bypass Valve Assembly |
| SprayTech GPX 130 | Bypass Valve Assembly |
| SprayTech GPX 85 | Bypass Valve Assembly |
| SprayTech GPX 80 | Bypass Valve Assembly |
| SprayTech Airless EPX2555 | Bypass Valve Assembly |
| SprayTech Airless EPX2505 | Bypass Valve Assembly |
| SprayTech Airless EPX2455 | Bypass Valve Assembly |
| SprayTech Airless EPX2405 | Bypass Valve Assembly |
| SprayTech Airless EPX2355 | Bypass Valve Assembly |
| SprayTech Airless EPX2305 | Bypass Valve Assembly |
| SprayTech Airless EPX2255 | Bypass Valve Assembly |
| SprayTech Airless EPX2155 | Bypass Valve Assembly |
| SprayTech Airless Advantage EPX2555 | Bypass Valve Assembly |
| SprayTech Airless Advantage EPX2455 | Bypass Valve Assembly |
| SprayTech Airless Advantage EPX2355 | Bypass Valve Assembly |
| SprayTech Airless Advantage EPX2255 | Bypass Valve Assembly |
| SprayTech Airless Advantage EPX2155 | Bypass Valve Assembly |
| RentSpray 400 | Bypass Valve Assembly |
| Impact 410 | Bypass Valve Assembly |
| Advantage GPX 220 | Bypass Valve Assembly |
| Advantage GPX 165 | Bypass Valve Assembly |
| Advantage GPX 130 | Bypass Valve Assembly |
| Advantage GPX 85 | Bypass Valve Assembly |
| Advantage 1100 | Bypass Valve Assembly |
| Advantage 700 | Bypass Valve Assembly |
| Advantage 600 | Bypass Valve Assembly |
| Advantage 500 | Bypass Valve Assembly |
| Advantage 400 | Bypass Valve Assembly |
Pressure control issues often involve multiple components. When replacing the bypass valve, inspect these related parts.
Bypass valve includes internal o‑rings that can harden or crack. A seal kit may be needed if the valve body is reused.
A faulty transducer can send incorrect signals, mimicking valve failure.
Worn pump components can cause pressure loss that may be misdiagnosed as a valve issue.
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