1. Introduction
The Pentair R161178 No.2 pH Test Solution is designed for accurate measurement of pH levels in water, primarily for swimming pools. This 1-ounce bottle provides a reliable reagent for your existing water testing kit, specifically formulated to replace Solution B in compatible Pentair Rainbow test kits. Proper pH balance is crucial for water quality and equipment longevity.
2. Safety Information
- Keep out of reach of children and pets.
- Avoid contact with skin and eyes. In case of contact, rinse thoroughly with water.
- Do not ingest. If swallowed, seek immediate medical attention.
- Store in a cool, dry place, away from direct sunlight and incompatible materials.
- Dispose of empty containers and expired solution according to local regulations.
3. Package Contents
- One (1) 1-ounce bottle of Pentair R161178 No.2 pH Test Solution.

Figure 1: Pentair R161178 No.2 pH Test Solution bottle. The bottle contains a red liquid and is approximately 3.4 inches (8 cm) tall, designed for easy handling and dispensing into a test kit.
4. Setup
This product is a replacement reagent for existing water testing kits. Before use, ensure your test kit is clean and free from contaminants. Identify the compartment or vial designated for "Solution B" or pH reagent in your test kit.
5. Operating Instructions
Follow the instructions provided with your specific water testing kit for accurate pH measurement. The Pentair R161178 No.2 pH Test Solution is used to replace Solution B in compatible test kits. General steps for pH testing typically include:
- Collect Water Sample: Fill the designated pH test vial in your kit with a water sample from the area you wish to test (e.g., swimming pool).
- Add Reagent: Carefully add the specified number of drops of Pentair R161178 No.2 pH Test Solution into the water sample vial. Refer to your test kit's instructions for the exact quantity.
- Mix and Compare: Cap the vial and gently invert to mix the solution. Compare the resulting color of the water sample to the color chart provided with your test kit to determine the pH level.
- Record Results: Note down the pH reading for your records and take appropriate action based on the results.
6. Maintenance
- Storage: Store the solution bottle upright in its original container, in a cool, dry, and well-ventilated area, away from direct sunlight and extreme temperatures.
- Shelf Life: Reagents can degrade over time. Check the expiration date on the bottle. For best accuracy, replace the solution annually or as recommended by your test kit manufacturer.
- Cleanliness: Ensure the dropper tip does not come into contact with the water sample or other surfaces to prevent contamination.
7. Troubleshooting
- Inaccurate Readings: If pH readings appear inconsistent or significantly different from other testing methods (e.g., test strips), consider the following:
- Expired Solution: Verify the expiration date of the test solution. Expired reagents can yield inaccurate results.
- Contamination: Ensure test vials and dropper tips are clean and free from residues.
- Dilution: If the solution appears lighter in color than expected or produces faint color changes, it may be diluted or compromised. Replace with a fresh bottle.
- Storage Conditions: Improper storage (e.g., exposure to heat or light) can affect reagent stability.
- No Color Change: If no color change occurs after adding the solution and mixing, ensure you have added the correct number of drops and that the solution is not expired or compromised.
8. Specifications
| Product Name | Pentair R161178 No.2 pH Test Solution |
| Model Number | R161178 |
| Brand | Pentair |
| Volume | 1 Ounce |
| pH Range (Tested) | 4-10 |
| Recommended Use | Swimming Pool pH Testing |
| Product Dimensions | 4 x 7 x 10.5 inches (packaging) |
| Item Weight | 2.08 ounces |
| UPC | 788379003395 |
9. Warranty and Support
For warranty information or technical support regarding the Pentair R161178 No.2 pH Test Solution, please contact Pentair customer service directly. Refer to the official Pentair website or product packaging for current contact details and warranty terms.
Official Pentair Website: www.pentair.com
10. Official Product Videos
No official product videos from the seller are available for this item at this time.