💧 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.