💧 Koller Basic Series Jet Pump – 0.45kW Single Speed

Compact, quiet power for whirlpool baths and small spa jet circuits

♨️ Product Overview

The Koller Basic Series Jet Pump (0.45kW) is a compact, quiet, and efficient single-speed pump designed for whirlpool baths and select European and Chinese hot tubs. This versatile pump serves dual purposes, functioning effectively as either a circulation pump or a boost pump on jet circuits with 4–6 jets.

The pump features the innovative self-drain design which allows water to flow back into the bath and down the plug hole when not in use, significantly reducing the risk of standing water and bacterial growth in the system. The integrated C-Profile mount system ensures straightforward installation, particularly when used with Koller Quick Fix Vario supports.

Koller pumps are commonly found in whirlpool baths from UK retailers including B&Q, as well as systems from European and Chinese manufacturers. With its silent-running motor and robust construction, the Koller Basic Series delivers reliable performance for residential and commercial wellness applications.

⭐ Key Features

• ✅ Motor Power: 0.45kW (0.05–0.5 HP) – Efficient output suitable for smaller spa systems and whirlpool baths
• ✅ Single-Speed Operation – Consistent, reliable performance with simple control integration
• ✅ Self-Drain Wet End – Water drains automatically via bottom inlet, preventing stagnation
• ✅ 1.5″ Male Buttress Threads – Industry-standard connections (63mm OD) for easy plumbing integration
• ✅ C-Profile Mount System – Compatible with Koller Quick Fix Vario supports for secure installation
• ✅ Compact & Quiet Design – Ideal for residential whirlpool baths where noise reduction matters
• ✅ Bare Wire Connection – Flexible wiring options for professional installation
• ✅ Jet Capacity: 4–6 Jets – Perfect for smaller hydrotherapy circuits

🔧 Technical Specifications

Specification	Value
Brand	Koller
Series	Basic
Model	Basic
Pump Type	Jet / Circulation
Motor Power	0.45 kW (0.05–0.5 HP)
Speed Settings	Single Speed
Self-Drain	Yes
Inlet Connection	1.5″ Male Buttress Thread
Outlet Connection	1.5″ Male Buttress Thread
Connection Diameter	63 mm (OD)
Thread Type	Male Buttress
Mount System	C-Profile (Koller Quick Fix Vario compatible)
Cord/Plug Type	Bare Wire
Air Switch Included	No
Spare Parts Available	No
Jet Capacity	4–6 jets
MPN	2611WE
SKU	PMP-3781

⚡ Electrical Requirements

Electrical Spec	Requirement
Frequency	50 Hz (UK Standard)
Phase	Single Phase
Connection Type	Bare Wire (hardwired installation)
Voltage	Please refer to manufacturer documentation
Amperage	Please refer to manufacturer documentation

⚠️ 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. Never attempt electrical connections yourself unless you are a qualified professional.

🔄 Compatibility Guide

Connection Sizing

The Koller Basic uses industry-standard 1.5″ connections. However, it’s important to understand that 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. The 1.5″ male buttress threads on this pump have an outside diameter of approximately 63mm.

This Pump Features:

• 📍 Wet End Type: Self-Drain
• 📍 Thread Type: Male Buttress
• 📍 Connection Size: 1.5″ / 63mm OD
• 📍 Mount System: C-Profile

Compatible Applications:

This pump is commonly found in:

• Whirlpool baths from UK retailers including B&Q
• European-manufactured whirlpool systems
• Chinese hot tub and whirlpool bath imports
• Custom spa installations requiring compact circulation

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 Position	Horizontal (self-drain configuration)
Base	Solid, level, vibration-dampening surface
Access	Allow adequate clearance for maintenance

Plumbing Connections

Connection	Size
Inlet	1.5″ / 63mm OD Male Buttress Thread
Outlet	1.5″ / 63mm OD Male Buttress Thread
Unions	Sold separately

Self-Drain Operation

The self-drain design draws water via the inlet situated at the bottom of the wet end front face. When the pump is switched off, water drains back through this connection, returning to the bath and down the plug hole. This design:

• ✅ Prevents standing water in the pump
• ✅ Reduces risk of bacterial growth
• ✅ Extends pump and seal life
• ✅ Simplifies maintenance

Installation Notes:

⚠️ Pump must be installed in a position that allows proper drainage through the self-drain system

⚠️ Never run the pump dry – this will cause seal damage and void warranty

⚠️ Ensure proper electrical bonding to earth as per BS 7671

⚠️ Installation must be performed by a competent individual or tradesperson trained within the industry

🔧 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
Visual inspection	Monthly	Look for signs of wear or damage

Self-Drain System Care

The self-drain feature significantly reduces maintenance requirements by preventing water stagnation. However:

• Ensure drain pathways remain clear and unobstructed
• Check that water drains completely after each use
• Inspect the 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
• ❌ Vibration that wasn’t present previously

🛁 Ideal Applications

Application	Suitability	Notes
♨️ Whirlpool Bath Jet Pump	✅ Excellent	Primary intended use with 4–6 jets
♨️ Spa Circulation Pump	✅ Good	Suitable for light circulation duties
🛁 Whirlpool Bath Boost Pump	✅ Excellent	Perfect for supplementary jet circuits
♨️ Small Hot Tub	✅ Good	European and Chinese models with smaller jet counts
♨️ Large Hot Tub	❌ Not Recommended	Insufficient power for systems exceeding 6 jets

Perfect For:

• Residential whirlpool baths
• Bathroom spa installations
• Small hydrotherapy systems
• Replacement for existing Koller Basic series pumps
• European and Chinese-manufactured whirlpool systems

❓ Frequently Asked Questions

Q: What power output does this pump have? A: The Koller Basic Series has a motor power output of 0.45kW (0.05–0.5 HP), suitable for whirlpool baths and small spa circuits with 4–6 jets.

Q: Will this pump fit my whirlpool bath? A: This pump uses 1.5″ male buttress thread connections (63mm OD) with the Koller C-Profile mounting system. Measure your existing pump’s connections and mounting arrangement to confirm compatibility.

Q: Is this a self-priming pump? A: This is a self-drain pump, meaning water drains back when the pump is off. It should be installed below water level to ensure proper operation.

Q: What voltage does this pump require? A: Please refer to the manufacturer documentation or contact Parts4Tubs for specific electrical requirements. All electrical installation must be performed by a qualified electrician in accordance with BS 7671.

Q: Is this pump single-speed or dual-speed? A: This is a single-speed pump designed for consistent operation. It does not have variable speed functionality.

Q: What size are the ports? A: Both inlet and outlet are 1.5″ male buttress threads with an outside diameter of approximately 63mm.

Q: Does this pump include an air switch? A: No, this pump does not include an air switch. It features bare wire connections for hardwired installation to your existing control system.

Q: Are unions included? A: No, unions are sold separately. Ensure you order compatible unions for your plumbing configuration.

Q: What warranty is included? A: Please contact Parts4Tubs directly for current warranty terms and conditions.

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, or overheating.

🏆 Why Choose the Koller Basic Series Jet Pump

• ✅ Established Brand – Koller pumps are widely used across UK and European whirlpool bath installations
• ✅ Compact & Quiet Operation – Silent-running motor ideal for residential bathroom installations
• ✅ Self-Drain Technology – Prevents water stagnation, reduces bacterial growth risk, and extends pump life
• ✅ Easy Installation – C-Profile mount system with Quick Fix Vario compatibility simplifies fitting
• ✅ Versatile Application – Works as both jet pump and circulation pump
• ✅ Industry-Standard Connections – 1.5″ male buttress threads (63mm OD) for broad compatibility

🤝 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 Series Jet Pump (0.45kW) is a compact, quiet, and efficient single-speed pump ideal for whirlpool baths and small hot tub installations. With 0.45kW of power, self-drain technology, and industry-standard 1.5″ male buttress connections (63mm OD), this pump supports 4–6 jet circuits with reliable performance. The C-Profile mount system ensures easy installation with Koller Quick Fix Vario supports. A practical, cost-effective solution for whirlpool bath replacements and European spa systems.