Part #: 944-620
Part #: 103-111
Part #: 539-078
Part #: 103-117
Maintain safe, effective pressure relief and system flush capability on your PowrTwin 4500 with our genuine Bleed Line Assembly With Valve parts. This sub-category covers the bleed line, valve, hose and tubing assemblies that allow your machine to safely relieve pressure, flush fluids and prevent over-pressurisation or system lock-up.
Here are some of the key parts listed in this sub-category (each part should link to its product page with full specs):
Pro Tip: If your system is slow to relieve pressure, leaking from the valve, or fluid doesn’t properly flush through the bleed line, inspect the valve (#944-620) and hose/tubing components (#103-111, #539-078) first — many service failures trace to worn or incorrect bleed line assemblies.
It covers the bleed valve (Part # 944-620), the hose/tube bleed line assembly (Part # 103-111), the supporting hose (Part # 539-078) and the short tubing (Part # 103-117) — all parts necessary for safe system depressurisation and flushing.
Because it allows you to safely relieve fluid pressure before servicing, flush the system, avoid trapped pressure, and maintain safe operation. A failed valve or hose can cause leaks, blocked flow, or unsafe maintenance conditions.
If the valve leaks or fails to open/close properly, replace the valve (944-620). If hoses are cracked, connections damaged, or the length is incorrect, replacing the full assembly (103-111) makes more sense. Check for hose wear, leaks, or routing issues.
While aftermarket parts may physically fit, using OEM parts ensures correct pressure rating, hose length, valve material (such as tungsten carbide seats) and compatibility. Using incorrect parts may compromise safety or performance.
Inspect every major service interval and whenever you perform maintenance. Check for leaks, smooth valve operation, hose condition and correct routing before using the machine. Because this part sees fluid and pressure regularly, wear can occur.
Browse our full selection of PowrTwin 4500 bleed line assembly parts above and select the exact item you need. If you’re unsure which part number or variant suits your machine, contact our support team — we’ll help you choose the right part and get your sprayer back to safe, peak performance.