Trash Pump Bypass Kit

Spraying Systems Piston-Type Pressure Relief/Regulating Valves Bypasses excess liquid. Adjustable to maintain control of line pressure at any pressure within the valve’s operating range. Selected pressure setting firmly held in place by lock-nut. Extra large valve passages to handle large flows. Features: Removable bonnet for servicing unit without removing valve from line. Details: Inlet & Pipe connections: 1/2″.

Here’s how to set the Spraying Systems Piston-Type Pressure Relief/Regulating Valve using the no-flow, no-gauge method:

Bypass Adjustment Without a Gauge (Field Method):

1. Ensure No Flow in the System:
   • Close the wand or downstream valve so the system is pressurized but not flowing.
2. Tighten the Bypass All the Way:
   • Turn the adjustment knob clockwise until it’s fully closed. This prevents any bypass initially.
3. Slowly Back It Out Until You See Flow:
   • Begin turning the knob counterclockwise slowly.
   • Watch the bypass hose — the moment you see water start to trickle or flow out, you’ve found the threshold pressure relief point.
4. Turn Another 180° Counterclockwise:
   • Once flow begins, continue turning the knob another half turn (180°) to ensure a consistent and safe bypass.
   • This relieves excess pressure and helps protect your pump and hoses.
5. Tighten the Locknut:
   • With the setting dialed in, tighten the brass locknut firmly to hold the adjustment in place.

This Method Works Best When:

• You don’t have a pressure gauge.
• You’re doing a quick field setup.
• You want to protect the pump from pressure spikes during wand shut-off or deadhead situations.

1” NPT threads default on elbow into proportioner. If you need a different size, please specify in the notes.