Introduction
This manual provides essential information for the safe assembly, operation, and maintenance of your Blue Wave Montilla 18-ft Round 52-in Deep Above Ground Swimming Pool. Please read all instructions carefully before beginning installation and retain this manual for future reference.
The Montilla 18-ft Round Above-Ground Pool is a complete backyard pool solution designed for long-lasting use. It features hot-dip galvanized steel construction with a zinc-aluminum coating for corrosion resistance, 6-inch steel top rails, reinforced uprights, and resin top caps for durability. The pool has a 7,200-gallon capacity and includes a Sandman sand filter pump, an A-frame ladder, an overlap liner, and a maintenance kit.

Image: Overview of the Blue Wave Montilla Round Pool Package, highlighting hard steel walls, fade-resistant materials, rust resistance, and 7,200 gallons water capacity.
Safety Information
Your safety and the safety of others are paramount. Always follow these general safety guidelines:
- Never leave children unattended in or near the pool. Adult supervision is required at all times.
- Ensure the pool area is secured to prevent unauthorized access, especially by young children.
- Do not dive or jump into the pool. The pool depth is not suitable for diving.
- Keep all electrical devices away from the pool.
- Regularly inspect the pool and its components for damage or wear.
- Maintain proper water chemistry to ensure a safe and healthy swimming environment.
The included A-frame ladder is designed for safe entry and exit. It features flip-up steps and a two-piece barrier to prevent unauthorized access when the pool is not in use. Always ensure the ladder is stable before use and that the flip-up steps are secured when not in use.

Image: Detailed view of the A-frame pool ladder, highlighting durable resin materials, built-in platform, two-piece barrier, lockable flip-up steps, and 250 pounds weight capacity.
Package Contents
Verify that all components listed below are present and undamaged before beginning assembly. If any parts are missing or damaged, contact customer support.
- Steel Wall Pool Structure (18-ft Round, 52-in Deep)
- Overlap Liner
- Sandman Sand Filter Pump (1-HP dual-speed motor)
- A-Frame Ladder
- Wide-Mouth Skimmer
- Return System
- Maintenance Kit (Nylon Wall Brush, Vinyl Liner Vacuum Head, Leaf Skimmer, 3-Piece 12-Ft Pole, Thermometer, 25-Ft Vacuum Hose)
Setup Instructions
The Montilla pool is designed for DIY assembly. Follow the detailed step-by-step instructions provided in the separate assembly guide included with your package. Ensure you have all necessary tools before starting.
Site Preparation
- Choose a level, stable area for your pool, free from sharp objects, roots, or debris.
- Ensure adequate drainage and access to electrical outlets for the pump.
- Clear the area of any overhead obstructions and ensure sufficient space around the pool for safety and maintenance.
Pool Wall Assembly
The pool features a durable steel wall constructed with hot-dip galvanized steel and a zinc-aluminum coating for enhanced corrosion resistance. The 6-inch steel top rails and 5-inch steel verticals provide lasting strength and stability.

Image: Diagram illustrating the pool's construction with hot-dip galvanized steel, zinc-aluminum coating, 52-inch depth, 18-ft diameter, steel uprights, resin top caps, and 6-inch top rails.
Liner Installation
Carefully install the overlap liner according to the assembly guide, ensuring it is smooth and free of wrinkles before filling the pool with water.
Ladder Assembly
Assemble the A-frame ladder following the instructions. Ensure all connections are secure and the ladder is stable before use.

Image: Visual representation of the tools included for DIY installation, such as a nylon wall brush, vinyl liner vacuum head, leaf skimmer, 3-piece 12-ft pole and thermometer, and 25-ft vacuum hose.
Operating the Filter System
The Sandman sand filter system is designed for high-efficiency water circulation and filtration. It features a 1-HP dual-speed pump with a 16,000-gallon turnover rate, circulating 3,720 gallons per hour.
Initial Setup and Priming
- Connect the filter pump to the pool's skimmer and return system using the provided hoses and 1.5-inch diameter pipe fittings.
- Fill the sand filter tank with the recommended amount of filter sand (approximately 110 lbs).
- Prime the pump according to the filter system's specific instructions to remove air from the system.
Daily Operation
- Operate the pump for several hours daily to ensure proper water circulation and filtration. The dual-speed motor allows for energy-efficient operation.
- Monitor the pressure gauge on the filter. When the pressure rises, it indicates the filter needs backwashing.

Image: The Sandman Sand Filter System, showing the filter tank, pump, and hose connections, with details on 16,000-gal turnover rate, 1.5-inch pipe fitting, 1.0-HP dual-speed pump, and 110-lbs sand capacity.
Maintenance
Regular maintenance is crucial for keeping your pool clean and extending its lifespan. The included Economy Maintenance Kit provides essential tools for this purpose.
Routine Cleaning
- Skimming: Use the leaf skimmer to remove debris from the water surface daily.
- Vacuuming: Use the vinyl liner vacuum head with the 25-ft vacuum hose and 3-piece 12-ft pole to clean the pool floor as needed.
- Brushing: Use the nylon wall brush to clean the pool walls and prevent algae buildup.
- Water Chemistry: Regularly test and adjust water chemistry (pH, chlorine, alkalinity) using a test kit. Refer to a pool chemistry guide for ideal levels.
- Filter Backwashing: Backwash the sand filter when the pressure gauge indicates it's needed, or as part of your regular maintenance schedule.

Image: Contents of the Economy Maintenance Kit, including a nylon wall brush, vinyl liner vacuum head, leaf skimmer, 3-piece 12-ft pole, thermometer, and 25-ft vacuum hose.
Winterization
Properly winterize your pool before freezing temperatures arrive to prevent damage. Consult a comprehensive pool winterization guide for detailed steps.
Troubleshooting
This section addresses common issues you might encounter with your above ground pool. For problems not listed here, contact customer support.
| Problem | Possible Cause | Solution |
|---|---|---|
| Cloudy Water | Improper filtration, chemical imbalance, high organic load. | Check filter, backwash if needed. Test and adjust water chemistry. Shock treat the pool. |
| Algae Growth | Low sanitizer levels, poor circulation. | Shock treat the pool, add algaecide, brush walls, ensure adequate pump run time. |
| Pump Not Priming | Air leak, low water level, clogged skimmer/strainer. | Check all connections for leaks. Ensure water level is above skimmer. Clean skimmer basket and pump strainer. |
| Water Leaks | Liner puncture, loose connections, damaged components. | Inspect liner for tears and patch if necessary. Tighten all hose clamps and fittings. Inspect pump and filter for cracks. |
Product Specifications
| Feature | Detail |
|---|---|
| Brand | Blue Wave |
| Model Number | NB9933 |
| Shape | Round |
| Product Dimensions (L x W x H) | 216"L x 216"W x 52"H (18-ft Diameter x 52-in Deep) |
| Water Capacity | 7,200 gallons |
| Material Type | Alloy Steel (Hot-dip galvanized with zinc-aluminum coating) |
| Color | Gray |
| Included Components | Filter Pump, Ladder, Liner, Maintenance Kit, Skimmer |
| Filter Pump Type | Sandman Sand Filter with 1-HP Dual-Speed Pump |
| Filter Turnover Rate | 16,000 gallons |
| Pump Circulation Rate | 3,720 gallons per hour |
| Sand Capacity (Filter) | 110 lbs |
| Ladder Weight Capacity | 250 lbs |
| Required Assembly | Yes |
| Item Weight | 238.8 Pounds |
Warranty Information
The Blue Wave Montilla Above Ground Swimming Pool is covered by a 15-year limited warranty. This warranty covers manufacturing defects in materials and workmanship under normal use and service. Please refer to the warranty card included with your product for full terms, conditions, and claim procedures.

Image: A badge indicating a 15-year limited warranty, emphasizing durability and longevity.
Customer Support
For technical assistance, missing parts, or warranty claims, please contact Blue Wave customer support. Have your model number (NB9933) and proof of purchase ready when contacting support.
You can find contact information on the Blue Wave website or through the retailer where you purchased the product. For more information, you may visit the Blue Wave Store on Amazon.


