In-stock parts
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In-stock parts
Order by 2PM MST
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The LDI Industries LSP151-04-01 sight plug provides a viewing window at a compatible low-pressure reservoir port. It combines a brass body, clear soda-lime glass sight and Buna-N seals with a 1/2-14 male PTF dryseal taper pipe connection.
This is the reflector configuration; a float ball is not included. Select it by the complete part number, port thread and operating conditions. It is a fluid-viewing component, not a spray head, nozzle or high-pressure fused sight plug.
The clear window allows visual checks without removing the plug. The stainless steel reflector sits behind the sight glass; choose this configuration when a reflector is required rather than the open-view or reflector-and-ball versions.
| Feature | Benefit |
|---|---|
| Clear glass window | View the fluid at the installed sight port. |
| Built-in reflector | Provides a reflective background behind the viewing window. |
| Male PTF connection | Installs in a matching reservoir port; check the actual port thread before ordering. |
| Specification | Detail |
|---|---|
| Manufacturer | LDI Industries |
| Series / part number | LSP151 / LSP151-04-01 |
| Configuration | Sight plug with reflector; no float ball |
| Connection | 1/2-14 male PTF dryseal taper pipe thread |
| Body | Brass |
| Sight / seals | Soda-lime glass / Buna-N |
| Reflector | Stainless steel |
| Sight diameter (B) | 0.56 inch |
| Hex width (C) | 0.88 inch |
| Maximum overall length (D) | 1.01 inches |
| Maximum working pressure | 100 psi at 69°F |
| Maximum operating temperature | 180°F (82°C) |
The pressure value is specified at 69°F; do not assume it applies at the maximum temperature. Confirm the allowable pressure at your actual fluid temperature and the compatibility of the fluid with brass, glass and Buna-N before installation.
| Check | What to confirm |
|---|---|
| Port and clearance | Match the 1/2-14 male PTF connection and allow space for the hex and viewing window. |
| Included configuration | LSP151-04-01 includes a reflector, not a float ball. Do not substitute the LSP151-05-01 size. |
| Operating conditions | Use within the applicable pressure and temperature limits. Steam service is not recommended. |
| Installation and condition | Do not install with an impact wrench. Scratches in the glass reduce its pressure capability; do not use a damaged sight plug. |
Need help selecting the correct sight plug? Contact UnitedBuilt through online chat, email parts@unitedbuilt.com, or call 602-253-7750 with your existing part number, reservoir port size and operating conditions.
| Country of Origin | USA (subject to change) |
|---|---|
| Weight | 0.3 lb |
| Series | LSP151 |