💧 Koller Basic Whirlpool Bath Pump – 0.90kW Single Speed
Powerful, quiet performance for larger whirlpool baths with 9–12 jets
♨️ Product Overview
The Koller Basic Whirlpool Bath Pump (0.90kW) is a powerful and versatile pump widely used in whirlpool baths across the UK and Europe. With a robust 1.2HP (0.90kW) motor spinning at 2900 RPM, this pump delivers excellent performance for larger whirlpool baths with 9–12 jets.
Commonly found on baths from high street retailers like B&Q, as well as in systems from European and Chinese manufacturers, this pump is known for its reliability and smooth operation. Equipped with a centre suction wet end and built-in pneumatic (air) switch, the pump is designed for efficient water circulation with convenient on/off control.
Featuring silent-running motors with Koller’s C-Profile mount system, installation is straightforward and performance is consistently dependable. The higher power output makes this pump ideal for larger whirlpool bath installations requiring more jet capacity than entry-level models can provide.
⭐ Key Features
- ✅ Motor Power: 0.90kW (1.2HP) – Powerful output for larger whirlpool baths
- ✅ Power Input (P1): 1.25kW – Efficient energy consumption
- ✅ Motor Speed: 2900 RPM – High-speed water circulation
- ✅ Single-Speed Operation – Reliable, consistent performance
- ✅ Centre Suction, Centre Discharge – Balanced water flow configuration
- ✅ Pneumatic (Air) Switch Included – Built-in air switch for easy on/off control
- ✅ 9–12 Jet Capacity – Perfect for larger whirlpool bath systems
- ✅ 1.5″ Male Buttress Threads – Industry-standard 63mm OD connections
- ✅ C-Profile Mount System – Compatible with Koller Quick Fix Vario supports
- ✅ Silent-Running Motor – Quiet operation ideal for residential bathrooms
- ✅ 220–240V / 50Hz – UK-compatible electrical supply
- ✅ Bare Wire Connection – Flexible installation options
⚙️ Technical Specifications
| Specification | Value |
|---|---|
| Brand | Koller |
| Series | Basic |
| Pump Type | Circulation / Jet |
| Motor Power (Output) | 0.90 kW (1.2 HP) |
| Power Input (P1) | 1.25 kW |
| Motor Speed | 2900 RPM |
| Speed Settings | Single Speed |
| Voltage | 220–240V |
| Frequency | 50 Hz |
| Cord / Plug Type | Bare Wire |
| Wet End Configuration | Centre Suction, Centre Discharge |
| Air Switch | Yes (Pneumatic) |
| Jet Capacity | 9–12 jets |
| Connection Size | 1.5″ Male Buttress Thread |
| Connection Diameter | 63 mm (OD) |
| Thread Type | Male Buttress |
| Mount System | C-Profile (Quick Fix Vario compatible) |
| Length | 340 mm |
| Spare Parts Available | No |
| MPN | 2613WNP |
| SKU | PMP-5283 |
⚡ Electrical Requirements
| Electrical Spec | Requirement |
|---|---|
| Supply Voltage | 220–240V |
| Frequency | 50 Hz |
| Phase | Single Phase |
| Power Input (P1) | 1.25 kW |
| Motor Speed | 2900 RPM |
| Connection Type | Bare Wire |
| Control Type | Pneumatic (Air) Switch |
⚠️ IMPORTANT ELECTRICAL SAFETY NOTICE:
All electrical work must be carried out by a qualified electrician in accordance with UK wiring regulations (BS 7671). Hot tub and whirlpool bath installations require RCD protection (30mA) for safety. The bare wire connection requires proper termination by a qualified professional. Never attempt electrical connections yourself unless you are a qualified professional.
🔄 Compatibility Guide
Connection Sizing
The Koller Basic uses industry-standard 1.5″ connections. Hot tub industry terminology differs from actual measured dimensions:
| Industry Term | Actual Outside Diameter |
|---|---|
| 1.5″ Connection | Approximately 63 mm |
| 2.0″ Connection | Approximately 79 mm |
| 2.5″ Connection | Approximately 92 mm |
💡 Tip: Always measure your existing connections carefully before ordering.
This Pump Features:
- 📍 Wet End Type: Centre Suction, Centre Discharge
- 📍 Thread Type: Male Buttress
- 📍 Connection Size: 1.5″ / 63mm OD
- 📍 Mount System: C-Profile
- 📍 Air Switch: Yes (built-in pneumatic)
Centre Suction vs Self-Drain
This pump uses a centre suction configuration:
| Feature | Centre Suction | Self-Drain |
|---|---|---|
| Inlet Position | Centre of wet end face | Bottom of wet end face |
| Drainage | Via separate drain connection | Drains back through inlet |
| Typical Use | Permanent installations | Baths requiring automatic drainage |
Compatible Applications:
This pump is commonly found in:
- Larger whirlpool baths from UK retailers including B&Q
- European-manufactured whirlpool systems
- Chinese hot tub and whirlpool bath imports
- Systems requiring pneumatic (air button) control
- Installations with 9–12 jet configurations
Note: Unions are sold separately. Ensure compatibility with your existing plumbing configuration before purchase.
🛠️ Installation Requirements
Mounting
| Requirement | Specification |
|---|---|
| Mount System | C-Profile |
| Compatible Support | Koller Quick Fix Vario |
| Pump Length | 340 mm |
| Base | Solid, level, vibration-dampening surface |
| Access | Allow adequate clearance for maintenance |
Plumbing Connections
| Connection | Size | Position |
|---|---|---|
| Suction (Inlet) | 1.5″ / 63mm OD Male Buttress Thread | Centre |
| Discharge (Outlet) | 1.5″ / 63mm OD Male Buttress Thread | Centre |
| Unions | Sold separately | – |
Electrical Connection
| Requirement | Specification |
|---|---|
| Connection Type | Bare Wire |
| Voltage | 220–240V / 50Hz |
| Installation | By qualified electrician only |
Pneumatic (Air) Switch Operation
The built-in pneumatic switch enables on/off control via:
- Air buttons mounted on the bath surround
- Electronic control systems with air switch output
- Standard topside controllers
Installation Notes:
⚠️ Installation must be carried out by a competent individual or tradesperson trained within the industry
⚠️ Never run the pump dry – this will cause seal damage
⚠️ Ensure proper electrical bonding to earth as per BS 7671
⚠️ Unions sold separately – ensure compatible unions are ordered
⚠️ Bare wire connection requires professional termination
🔧 Maintenance Guide
Routine Maintenance
| Task | Frequency | Notes |
|---|---|---|
| Check for leaks | Monthly | Inspect around seal area and union connections |
| Inspect unions | Monthly | Tighten if necessary to prevent water loss |
| Listen for unusual noise | Weekly | Normal operation should be quiet |
| Check motor ventilation | Quarterly | Keep air vents clear of debris |
| Test air switch operation | Monthly | Ensure pump responds to air button |
| Visual inspection | Monthly | Look for signs of wear or damage |
Centre Suction System Care
The centre suction configuration provides balanced water flow:
- Ensure suction and discharge lines remain clear and unobstructed
- Check that separate drain connection (if fitted) functions correctly
- Inspect inlet area periodically for debris buildup
Warning Signs – Consider Replacement If:
- ❌ Unusual grinding or screeching noises
- ❌ Water leaking from the seal area
- ❌ Motor trips the circuit breaker repeatedly
- ❌ Noticeably reduced water flow
- ❌ Motor overheating during operation
- ❌ Air switch not responding
- ❌ Excessive vibration
- ❌ Motor speed noticeably slower than 2900 RPM
🛁 Ideal Applications
| Application | Suitability | Notes |
|---|---|---|
| ♨️ Whirlpool Bath (9–12 jets) | ✅ Excellent | Primary intended use |
| ♨️ Large Whirlpool Bath | ✅ Excellent | Ideal for higher jet counts |
| ♨️ Spa Circulation Pump | ✅ Good | Suitable for circulation duties |
| 🛁 Whirlpool Bath Replacement | ✅ Excellent | Direct replacement for Koller Basic 0.90kW pumps |
| ♨️ European/Chinese Hot Tubs | ✅ Good | Common in imported systems |
| ♨️ Small Whirlpool Bath (4–6 jets) | ⚠️ Overpowered | Consider 0.45kW or 0.55kW models |
Perfect For:
- Residential whirlpool baths with 9–12 jets
- B&Q and UK high street larger whirlpool bath replacements
- European-manufactured whirlpool systems
- Systems requiring pneumatic control
- Replacement for existing Koller Basic 0.90kW pumps
- Upgrading from lower-powered pumps
❓ Frequently Asked Questions
Q: What power output does this pump have? A: The Koller Basic has a motor power output of 0.90kW (1.2HP) with a power input (P1) of 1.25kW. The motor runs at 2900 RPM.
Q: How many jets can this pump support? A: This pump is suitable for whirlpool baths with 9–12 jets.
Q: Will this pump fit my whirlpool bath? A: This pump uses 1.5″ male buttress thread connections (63mm OD) with centre suction/centre discharge configuration and Koller C-Profile mounting system. Measure your existing pump’s connections and mounting arrangement to confirm compatibility.
Q: Does this pump include an air switch? A: Yes, this pump has a built-in pneumatic (air) switch for on/off control via air buttons or electronic control systems.
Q: What voltage does this pump require? A: The pump operates on 220–240V at 50Hz (UK standard). The pump comes with bare wire connections requiring professional termination by a qualified electrician.
Q: Is this pump single-speed or dual-speed? A: This is a single-speed pump running at 2900 RPM for consistent, reliable operation.
Q: What size are the ports? A: Both suction (inlet) and discharge (outlet) are 1.5″ male buttress threads with an outside diameter of approximately 63mm. Both are centre-mounted.
Q: Are unions included? A: No, unions are sold separately. Ensure you order compatible unions for your plumbing configuration.
Q: What is the pump length? A: The pump length is 340mm.
Q: What is the difference between this and the 0.55kW model? A: This 0.90kW model is more powerful (1.2HP vs 0.74HP), supports more jets (9–12 vs 6–8), runs at higher RPM (2900), and uses centre suction instead of self-drain. It’s designed for larger whirlpool bath installations.
Q: Can spare parts be purchased separately? A: No, spare parts are not currently available for this pump series. If service is required, replacement of the complete unit is recommended.
Q: How do I know if my pump needs replacing? A: Signs include unusual noises (grinding, screeching), water leaking from the seal, reduced water flow, motor tripping the breaker repeatedly, air switch not responding, or overheating.
🏆 Why Choose the Koller Basic 0.90kW Pump
- ✅ Higher Power Output – 1.2HP motor handles 9–12 jets with ease
- ✅ 2900 RPM Motor Speed – Fast, efficient water circulation
- ✅ Proven Reliability – Widely used across UK whirlpool bath installations
- ✅ Silent-Running Motor – Quiet operation ideal for residential bathrooms
- ✅ Centre Suction Design – Balanced water flow for consistent performance
- ✅ Built-in Pneumatic Switch – Convenient air button control included
- ✅ Easy Installation – C-Profile mount system with Quick Fix Vario compatibility
- ✅ UK Electrical Compatibility – 220–240V / 50Hz supply
🤝 Why Buy From Parts4Tubs
- ✅ UK-Based Company – Local support and fast domestic delivery
- ✅ Expert Advice – Knowledgeable team ready to assist with compatibility questions
- ✅ Fast UK Delivery – Get your replacement pump quickly to minimise downtime
- ✅ Competitive Pricing – Great value on genuine spa and whirlpool parts
- ✅ Full Warranty Support – Peace of mind with manufacturer-backed warranties
- ✅ Easy Returns – Hassle-free returns policy within 30 days
- ✅ Quality Parts Guarantee – Only genuine, high-quality components
✨ Summary
The Koller Basic Whirlpool Bath Pump (0.90kW) is a powerful, quiet, and reliable single-speed pump designed for larger whirlpool baths with 9–12 jets. With 0.90kW (1.2HP) output power, 2900 RPM motor speed, centre suction/centre discharge configuration, built-in pneumatic air switch, and industry-standard 1.5″ male buttress connections (63mm OD), this pump delivers dependable high-performance water circulation. Operating on 220–240V / 50Hz UK supply with bare wire connection, featuring C-Profile mounting for easy installation, it’s the trusted choice for B&Q whirlpool baths and European spa systems requiring higher jet capacity.








