Davies Craig In Line Adaptor - 35mm OD - 2 x 1/4'' NPT Ports
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Product Information
Full details
The Davies Craig In Line Adaptor (35mm OD) is designed for vehicle owners looking to easily install 1/4" NPT temperature sensors or air bleed fittings into their cooling systems. Its key benefit is simplifying the addition of these crucial components, especially for older vehicles lacking factory air bleeds, thereby improving cooling system performance and reducing overheating risks. A potential caveat is its specific fitment for 35mm or 38mm internal diameter radiator hoses.
All features
| Model Part Number | 419 |
|---|---|
| Brand | Davies Craig |
Extended Product Information
FAQs
What is the primary purpose of this adaptor?
The primary purpose is to provide two 1/4" NPT ports on your radiator hose, allowing for the easy installation of coolant temperature sensors or air bleed fittings, especially on vehicles without factory provisions.
Will this fit any radiator hose?
No, this adaptor is specifically designed for radiator hoses with an internal diameter of 35mm or 38mm.
Do I need to buy special sensors for this adaptor?
No, the adaptor uses standard 1/4" NPT threaded fittings, which are common for many aftermarket temperature sensors and air bleed screws.
How do I bleed air from my cooling system using this?
You can thread an air bleed screw into one of the NPT ports. With the engine running and the heater on, slowly open the bleed screw to release trapped air until only coolant emerges.
Can I install both a sensor and a bleed fitting at the same time?
Yes, the adaptor features two 1/4" NPT ports, allowing you to install both a temperature sensor and an air bleed fitting simultaneously.
Is installation difficult?
Installation involves cutting the radiator hose and securing the adaptor with clamps. While straightforward, it requires basic mechanical aptitude and proper tools.
What material is the adaptor made from?
The product description does not specify the material, but it is designed for automotive cooling system applications.
Troubleshooting
Cooling system still overheating after installation.
Ensure the system was thoroughly bled of all air. Check that the adaptor is installed correctly and hose clamps are tight. Verify the radiator and other cooling components are functioning correctly.
Leaking around the adaptor or fittings.
Check that the hose clamps are sufficiently tightened. Ensure the radiator hose is in good condition and properly seated on the adaptor. Reapply thread sealant to NPT fittings if leaks persist at the ports.
Temperature sensor reading seems inaccurate.
Confirm the sensor is fully seated in the adaptor and making good contact. Ensure the sensor itself is functional. Verify the sensor's wiring is correctly connected to the gauge or ECU.
Pros and Cons
Pros
- Simplifies the installation of temperature sensors and air bleed fittings.
- Improves cooling system efficiency by enabling effective air bleeding.
- Universal fit for common radiator hose sizes (35mm & 38mm internal diameter).
- Suitable for retrofitting modern monitoring to older vehicles.
- Robust design for long-term reliability.
Cons
- Requires basic mechanical knowledge for installation.
- Limited to specific radiator hose internal diameters (35mm/38mm).
- Does not include sensors or bleed fittings; these must be sourced separately.
- May require additional sealant or clamps for a secure fit, depending on hose condition.
Setup, Compatibility & Care
Setup:
- Safety First: Ensure the engine is completely cool before beginning work.
- Locate Hose: Identify the upper radiator hose.
- Cut Hose: Carefully cut a section from the upper radiator hose that matches the length required for the adaptor's insertion.
- Install Adaptor: Slide the adaptor into the cut hose ends, ensuring a snug fit. Use appropriate hose clamps (not included) on both sides of the adaptor to secure it firmly.
- Install Fittings: Thread your 1/4" NPT temperature sensor or air bleed fitting into the adaptor's ports. Use thread sealant suitable for high-temperature applications if necessary.
- Refill & Bleed: Refill the cooling system with the appropriate coolant mixture and follow your vehicle's procedure for bleeding any air.
Compatibility:
- Hose Size: Fits radiator hoses with an internal diameter of 35mm or 38mm.
- Port Thread: Compatible with standard 1/4" NPT fittings (temperature sensors, bleed screws, etc.).
Care:
- Regularly inspect the adaptor and hose connections for any signs of leaks or degradation.
- Clean the exterior of the adaptor with a damp cloth if necessary. Avoid harsh solvents.
- Ensure fittings are not overtightened to prevent damage to the adaptor's ports.