SprayTech part 103-550 is a bent siphon tube used in airless sprayer systems to draw material from the container to the pump inlet. This tube creates the fluid path from the supply container to the pump, allowing consistent material flow during operation. When the original siphon tube becomes cracked, clogged, or damaged, replacing it with this component restores proper material pickup and reliable sprayer performance.
| Part Number | 103-550 |
|---|---|
| Part Description | Bent Siphon Tube |
| Brand | SprayTech |
| Fits | ProMark II; PowrTwin 3500; PowrLiner 2800; Commander |
| Condition | New |
The SprayTech 103-550 Bent Siphon Tube is a replacement component designed for airless sprayer systems that draw material directly from a container into the pump. This tube serves as the fluid pickup pathway, extending from the pump inlet down into the material container to supply coating to the pumping mechanism. The bent configuration is engineered to position the tube correctly within the container while allowing clearance for the container opening and providing access to the bottom where material collects. Proper siphon tube function is essential for maintaining consistent material flow and preventing the pump from drawing air into the system.
During normal sprayer operation, the siphon tube remains submerged in the coating material, allowing the pump to draw fluid continuously as the gun is triggered. Over time, the tube may become cracked from repeated installation and removal, clogged with dried material or debris, or damaged from contact with the container or job site conditions. A cracked siphon tube can allow air to enter the fluid path, causing the pump to lose prime, sputter, or fail to build pressure. A clogged tube restricts material flow, leading to reduced output, poor spray patterns, and excessive pump cycling as the system struggles to maintain pressure. In some cases, the tube may become loose at the pump connection, allowing material to leak or air to enter the suction side of the system.
Replacing a compromised siphon tube with the 103-550 component restores the original fluid pickup characteristics engineered for these sprayer systems. This tube is manufactured to match the original specifications for diameter, length, bend angle, and material composition, ensuring proper fit within the container and secure attachment to the pump inlet. Installation involves removing the existing tube, cleaning any debris from the pump inlet fitting, and inserting the new tube until it seats fully. The tube should be positioned so that its end reaches near the bottom of the material container without contacting the bottom directly, allowing for full material usage while maintaining adequate clearance for flow. During replacement, inspecting the pump inlet fitting and any associated seals for damage is recommended, as these components can affect suction performance if worn or deteriorated.
| Material pickup | Draws coating from the container to the pump inlet for consistent fluid supply |
|---|---|
| Priming function | Provides the fluid path necessary for the pump to establish prime and maintain flow |
| Air prevention | Maintains submerged pickup to reduce air entry into the fluid system |
| Cracks or splits | Visible damage that allows air entry or material leakage |
|---|---|
| Clogged tube | Material buildup inside the tube that restricts fluid flow |
| Loose connection | Tube does not fit securely in the pump inlet fitting |
| Difficulty priming | Pump struggles to draw material despite proper priming procedures |
SprayTech part 103-550 is compatible with the following sprayer models. Always confirm fitment using the correct parts diagram for your exact model and revision.
| Sprayer Model | Application |
|---|---|
| ProMark II | Bent siphon tube |
| PowrTwin 3500 | Bent siphon tube |
| PowrLiner 2800 | Bent siphon tube |
| Commander | Bent siphon tube |
Fluid pickup issues often involve multiple components. When replacing the siphon tube, these parts are commonly inspected or serviced at the same time.
A clogged inlet filter can restrict flow and cause symptoms similar to a damaged siphon tube.
Inspect the fitting for debris, cracks, or worn sealing surfaces when replacing the tube.
If equipped, inspect the return tube for damage that could affect system priming.
Copyright © 2024 AlltitanParts.com - All Rights Reserved.
