1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of your iSpring T32M Pressurized Water Storage Tank. This tank is designed for use with Reverse Osmosis (RO) systems to store purified water and deliver it on demand.
The reverse osmosis process is inherently slow, making a pressurized storage tank essential for a consistent water supply. The T32M tank fills with purified water, and its internal air bladder ensures water is dispensed efficiently when the RO faucet is opened. This closed expansion tank design prevents external pollutants from entering the stored water.
2. Key Features
- Metal pressurized tank with up to 3.2 gallon holding capacity.
- Constructed with a food-grade butyl diaphragm and post-cure procedures to ensure a tasteless and odorless water chamber.
- Tested by an independent third-party to meet NSF/ANSI Standard for material safety.
- Features a stainless steel 1/4" NPT valve thread. A 1/4-inch tank valve is included.
- Designed for effective discharge in both vertical and horizontal positions.
- Pre-pressurized between 7-10 psi for common use.
3. Components Overview
The iSpring T32M tank includes the following main components:
- Pressurized Water Storage Tank (Model T32M)
- 1/4" Tank Valve
4. Specifications
| Feature | Detail |
|---|---|
| Model Name | T32M |
| Actual Tank Size | 4.0 Gallons |
| Tank Storage Capacity (Draw-down) | 3.2 Gallons |
| Product Dimensions (L x W x H) | 11" x 11" x 14" |
| Item Weight | 8.82 Pounds (4 Kilograms) |
| Connection Type | Stainless steel 1/4" NPT valve thread |
| Pre-pressurization | 7-10 psi |
| Installation Type | Under Sink |
| Certifications | NSF 61 and 58 listed, IAMPO approved, CE Mark approved (PED) |
5. Installation Guide
5.1 Before You Begin
- Ensure all necessary components are present: the T32M tank and the 1/4" tank valve.
- Turn off the water supply to your Reverse Osmosis system.
- Ensure the area under the sink is clean and clear for installation.
5.2 Step-by-Step Installation
- Prepare the Tank Valve: Apply 3-5 wraps of Teflon tape (not included) clockwise around the threaded stem of the 1/4" tank valve.
- Attach the Tank Valve: Screw the prepared tank valve onto the stainless steel 1/4" NPT thread at the top of the T32M tank. Hand-tighten, then use a wrench to tighten an additional 1/4 to 1/2 turn. Do not overtighten.
- Connect to RO System: Connect the outlet of the tank valve to the post-filter side of your Reverse Osmosis system using appropriate tubing (typically 1/4" RO tubing, not included). Ensure all connections are secure and leak-free.
- Position the Tank: Place the tank in its desired location, either vertically or horizontally, ensuring it is stable. The tank is designed to discharge effectively in both positions.
- Restore Water Supply: Slowly turn on the water supply to your RO system. Check for any leaks at all connection points.
- Initial Flush: After installation, allow the RO system to fill the tank completely. Then, open the RO faucet and drain the tank completely. Repeat this process 2-3 times to flush out any manufacturing residues and ensure optimal water quality. This is particularly important as a slight oily sheen may be present in the initial water due to cartridge sealing agents.
6. Operation
Once installed and flushed, the iSpring T32M tank operates automatically with your Reverse Osmosis system. As the RO system produces purified water, it fills the tank. When you open your RO faucet, the pre-pressurized air bladder inside the tank pushes the stored water out, providing a steady flow.
The tank is pre-pressurized between 7-10 psi. This pressure is generally suitable for most residential RO systems. If you experience consistently low flow from your RO faucet, you may need to check and adjust the tank's air pressure using a standard tire pressure gauge and a bicycle pump (or similar) on the air nozzle (Figure 3).
7. Maintenance
- Regular Inspection: Periodically inspect the tank and all connections for any signs of leaks or damage.
- Pressure Check: If water flow from your RO faucet decreases significantly, check the tank's air pressure. The recommended pressure is typically 7-10 psi when the tank is empty of water. To check, turn off the water supply to the RO system, drain the tank completely, then check the pressure at the air nozzle. Adjust if necessary.
- Cleaning: The exterior of the tank can be wiped clean with a damp cloth. Do not use harsh chemicals.
- Tank Replacement: While the tank itself is durable, its internal bladder can degrade over many years. If you notice persistent issues with pressure or water quality that cannot be resolved by other troubleshooting steps, consider replacing the tank.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Low water flow from RO faucet | Low tank air pressure; Clogged RO filters; Faulty RO membrane. | Check and adjust tank air pressure (7-10 psi when empty). Replace RO filters or membrane as needed. |
| Water has an "oily sheen" or unusual taste after initial installation | Residue from manufacturing process (sealing agents). | Perform thorough initial flushing (drain and refill tank 2-3 times). This is normal and will dissipate. |
| Tank does not fill with water | Water supply to RO system is off; RO system is not producing water; Tank valve is closed. | Ensure water supply is on. Check RO system for proper operation. Ensure tank valve is open. |
| Water leaks from connections | Loose connections; Insufficient Teflon tape; Damaged O-rings/fittings. | Tighten connections. Reapply Teflon tape. Inspect and replace damaged parts. |
9. Warranty and Support
iSpring products are designed for reliability and performance. For warranty information and to activate your product warranty, please visit the official iSpring website:
For technical support, troubleshooting assistance, or questions regarding your iSpring T32M tank, please contact iSpring customer service through their website or the contact information provided with your product packaging.
