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How to install a sewer valve?
Installing sewer valves requires following specific steps depending on the type of valve (such as check valves, flush valves, etc.). The key is to ensure the correct orientation, proper sealing, and to test for any leaks. The following are general installation guidelines:
**Preparation before Installation:**
- Gather the necessary tools and materials, including PTFE tape, silicone sealant, tape measure, wrenches, etc., and verify that the valve model matches the pipe specifications.
**Inspect the Valve:**
- Ensure the valve is in good condition, the valve stem moves smoothly without any obstruction, and remove any debris inside the valve.
**Determine the Flow Direction:**
- For valves with a specific orientation (such as check valves or gate valves), install them according to the arrow indication, with the arrow pointing in the direction of water flow. For gate valves, the inlet should be at the lower level and the outlet at the higher level.
**Installation Steps:**
1. **Pipe Preparation:**
Clean the pipe joints to remove any burrs or impurities.
2. **Connect the Valve:**
- **Threaded Connection:** Wrap PTFE tape around the pipe threads to prevent it from entering the valve body. Use a wrench to tighten the valve body’s hexagon nut.
- **Flanged Connection:** Align the flange holes and tighten the bolts symmetrically to avoid uneven stress.
3. **Fixing and Adjustment:**
Install the valve in a position that is easy to operate (the handwheel should be about 1.2 meters above the ground), and ensure that the valve stem does not point downward. On horizontal pipes, the valve stem should point upward or be at an angle.
4. **Sealing:**
Apply silicone sealant or putty at the joints to ensure a tight seal.
**Post-Installation Inspection:**
- **Leak Detection:** Slowly introduce water and check all joints for leaks. Make any necessary adjustments promptly.
- **Function Verification:** Manually open and close the valve to ensure smooth operation without any obstruction. For check valves, test their ability to close automatically.
- **Clean-Up:** Remove any excess sealing material and ensure that there is no debris around the valve.
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