

PowrTwin part 335-590A is a Bleed line assembly used to relieve pressure and return excess material to the supply tank. When the assembly becomes cracked, clogged, or disconnected, pressure regulation suffers and material waste increases. This replacement assembly restores proper bleed and return flow on compatible PowrTwin and PowrLiner units.
| Part Number | 335-590A |
|---|---|
| Part Description | Bleed line assembly |
| Brand | PowrTwin |
| Fits | PowrTwin 4900, 6900, 8900, 12000 Plus, PowrLiner 6950_1, PowrLiner 6950, PowrLiner 4950, PowrLiner 4955, 6955, 8955 |
| Condition | New |
The PowrTwin 335-590A Bleed line assembly is a complete fluid conveyance component designed to relieve system pressure and return excess material to the supply tank during recirculation or idle periods. On compatible equipment including the PowrTwin 4900, 6900, 8900, and 12000 Plus, as well as PowrLiner 6950_1, 6950, 4950, 4955, 6955, and 8955 models, this bleed line assembly is essential for proper pressure regulation and material management. When the sprayer or striping machine is not actively spraying, the bleed line allows fluid to recirculate back to the tank, preventing dangerous pressure buildup and reducing material settling. A cracked bleed line creates external leakage, causing material waste and cleanup hazards. A kinked or crushed line prevents proper recirculation, leading to pressure spikes, component stress, or erratic spray performance. A clogged line from dried material can cause complete loss of pressure regulation. Over time, exposure to solvents, abrasives, temperature cycling, and flexing can cause line materials to harden, crack, or become blocked. Replacing a damaged bleed line assembly restores proper pressure relief, recirculation flow, and system protection. This genuine PowrTwin replacement assembly meets original equipment specifications for hose material, inner diameter, length, pressure rating, fitting compatibility, and chemical resistance. When installing a new bleed line assembly, inspect all fittings and connections for damage, route the line away from hot or moving parts, avoid sharp bends or kinking, and secure with appropriate clamps. Users should always verify compatibility with their specific model and revision before installation. Regular inspection of bleed line assemblies for cracks, kinks, or blockages should be part of preventive maintenance programs.
| Pressure relief | Allows fluid to recirculate when equipment is not in use |
|---|---|
| Material return | Returns excess material to supply tank to prevent waste |
| System protection | Prevents pressure spikes that can damage seals or components |
| External leakage | Fluid dripping or spraying from cracks or worn line |
|---|---|
| Kinking or crushing | Line visibly bent, flattened, or restricted |
| Clogged line | No recirculation flow visible or pressure spikes during idle |
| Material hardening | Line feels stiff, brittle, or shows cracking when flexed |
PowrTwin part 335-590A is compatible with the following equipment. Always confirm fitment using the correct parts diagram for your exact model and revision.
| Model | Component |
|---|---|
| PowrTwin 4900, 6900, 8900, 12000 Plus | Bleed line assembly |
| PowrLiner 6950_1, 6950, 4950, 4955, 6955, 8955 | Bleed line assembly |
Pressure regulation and recirculation problems are often caused by more than one component. When servicing the bleed line assembly, these parts are commonly inspected at the same time.
Damaged or loose fittings prevent proper line connection and sealing.
Worn or loose clamps allow line disconnection or leakage under pressure.
A stuck relief valve can cause pressure spikes independent of bleed line condition.