Bathroom Drain Testing: How to Successfully Block Your Floor Drain

After completing waterproofing in the bathroom, a water testing experiment should be conducted to evaluate the effectiveness of the waterproofing work. Since bathrooms are equipped with a floor drain, it is essential to know how to block the floor drain during the water test. Here are methods to block the bathroom floor drain and tips on what to pay attention to when carrying out waterproofing.

How to Block the Bathroom Floor Drain for Water Testing

1. The simplest method is to use sandbags. Place the sandbags in a plastic bag to block the floor drain, after which you can proceed with the water test.

2. You can also fill plastic gloves with water, then push the gloves into the drain to effectively block the drain hole.

3. Another option is to use a cork, wrapping it in several layers of cloth, and finally sealing it in a plastic bag to close off the drain.

Key Considerations for Bathroom Waterproofing

1. Start by applying cement mortar on the floor, ensuring to find a slope toward the drainage pipe. The surface must be smooth; the slope near the door should be minimal, while the slope around the floor drain should be more pronounced.

2. Pipes should pass through the floor and around the root of the drainage pipe to enhance waterproofing performance. Seal the root area tightly with construction sealant and smooth out the cement for better protection. Then, apply a layer of waterproof coating on top of the fiberglass reinforcement layer.

3. The wall surfaces should be clean and smooth, free of dust or small particles. The joints where the walls meet the floor should have slight original angles or slopes. When applying the waterproof coating, two layers of fiberglass reinforcement material should be applied.

4. The total thickness of the waterproof membrane must be at least 1.5mm. This does not depend on the number of coats applied. Focus on brushing around the roots of pipes and at corners first, allowing the surface to dry at room temperature for 4 hours before applying a larger area and scraping it down, ensuring there are no leaks or bubbles. Use a brush to apply over a large area for 24 hours before applying the next layer after it has hardened.

5. The waterproof layer on the floor should extend 300 cm into the bathroom entry, and the waterproof flooring must be 20 cm higher than the floor surface. Finally, conduct a water retention test for 36 hours; if there is no leakage, it indicates that the waterproofing work has been done properly.

In summary：this article explains how to block the bathroom floor drain during water testing and presents important considerations for bathroom waterproofing. We hope this information will be helpful to you, and for more content, feel free to continue following our website.