Bastion Central Heating Circulating Pump (130mm, 6m Head)
Bastion 25-6-130 Central Heating Circulating Pump
The Bastion 25-6-130 central heating circulating pump circulates heating water through compatible radiator and wet underfloor heating systems. It features three manual speed settings, a maximum 6m pump head, 130mm installation length and 1½" threaded connections. With a cast iron body and 230V, 50Hz supply, this heating circulator is suitable for compatible new installations and pump replacement work. Select the operating speed to suit the heating circuit's requirements.
Bastion Central Heating Circulating Pump (130mm, 6m Head)
Bastion 25-6-130 Central Heating Circulating Pump
The Bastion 25-6-130 central heating circulating pump circulates heating water through compatible radiator and wet underfloor heating systems. It features three manual speed settings, a maximum 6m pump head, 130mm installation length and 1½" threaded connections. With a cast iron body and 230V, 50Hz supply, this heating circulator is suitable for compatible new installations and pump replacement work. Select the operating speed to suit the heating circuit's requirements.
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Quick Trade Summary: Bastion Central Heating Circulating Pump (130mm, 6m Head)
The Bastion Central Heating Circulating Pump (ZL-3001-25/6) is the UK trade benchmark replacement pump for domestic underfloor heating manifolds and compact boiler circuits. Engineered with standard 130mm port-to-port dimensions and 1½" BSP threaded union connections, it delivers up to 6 metres of dynamic hydraulic head, providing dependable flow across 2 to 10 manifold circuit loops while meeting strict ErP 2015 energy efficiency directives.
Trade Engineering Standards & Hydraulic Application
In hydronic underfloor heating installations, matching the circulation pump's head and volumetric flow rate to circuit pressure drop is essential to prevent cold spots, actuator noise, and premature component wear. The Bastion Central Heating Circulating Pump (130mm, 6m Head) is precision-engineered to British Standard BS EN 1264 and CIBSE hydronic sizing standards, guaranteeing balanced loop flow across modern UK domestic and commercial heating systems.
Engineering Specifications & Technical Standards
| Parameter | Specification Standard |
|---|---|
| Model / SKU | Bastion ZL-3001-25/6 |
| Port-to-Port Length | 130mm (UK Underfloor Heating Manifold Standard) |
| Maximum Delivery Head | 6.0 Metres (0.6 bar hydraulic lift) |
| Maximum Flow Rate (Qmax) | 3.2 m³/h (53.3 Litres/min) |
| Threaded Connection | 1½" BSP Male (Standard 1" BSP Pump Union Nut) |
| Motor Technology | High-Efficiency Permanent Magnet Synchronous Motor (ECM) |
| Energy Efficiency Index (EEI) | EEI ≤ 0.20 (ErP 2015 Part 2 Directive Compliant) |
| Supply Voltage & Frequency | 230V AC ±10%, 50/60 Hz Single Phase |
| Power Consumption Range | 5W (Eco Standby) to 45W (Full 6m Head Load) |
| Operating Fluid Temperature | +2°C to +95°C (Continuous UFH Heating Rating) |
| Maximum Working Pressure | 10 Bar (1.0 MPa Static PN10 Rating) |
| Ingress Protection Rating | IP44 / Class F Insulation |
| Compliance Standards | BS EN 1264, BS EN 16297-1/3, CE, UKCA Approved |
Step-by-Step Installation & Commissioning Protocol
- Hydraulic Isolation & Depressurisation: Close manifold isolation ball valves and isolate primary boiler feeds before loosening union nuts. Have a trade catchment tray ready for residual water.
- Gasket Seating & Mechanical Fit: Inspect flat union mating faces. Insert fresh 1½" EPDM sealing washers. Position pump body strictly with the motor shaft horizontal (never pointing vertically up or down) to ensure water-lubricated bearing longevity.
- Torque Alignment: Tighten 1½" BSP union nuts by hand, then secure with adjustable pump spanners to recommended torque (approximately 45–55 Nm). Do not overtighten or pinch the rubber gasket.
- Electrical Termination: Wire live, neutral, and earth into the manifold wiring centre or 230V room thermostat switched live output. Verify earth continuity in accordance with BS 7671 (IET Wiring Regulations 18th Edition).
- Venting & Air Purging: Fill the manifold circuits loop by loop until flowmeter sight glasses run crystal clear of trapped microbubbles. Power on pump and allow automatic air-venting routine to complete before locking final operational mode.
- Flow Balancing: Calibrate flowmeters on each manifold port according to CIBSE design calculation sheets (typically 1.5 to 2.5 Litres/min per loop depending on loop length).
Frequently Asked Questions: Bastion Central Heating Circulating Pump (130mm, 6m Head)
Will this Bastion pump fit my existing underfloor heating manifold?
Yes, it features the UK industry-standard 130mm port-to-port spacing and 1½" BSP threaded union connections, making it a direct drop-in replacement for Grundfos UPM3 130, Wilo Para 25/6, Dab Evosta, and Reliance manifold blending packs.
What is the difference between a 130mm UFH pump and a 180mm boiler pump?
A 130mm pump has a compact body designed specifically to mount between the flow and return bars of underfloor heating mixing control packs. Standard boiler and cylinder circulating pumps are 180mm long and cannot fit into compact UFH manifold cabinets without extensive pipe reconfiguration.
Which operating curve should I select for underfloor heating loops?
Select Proportional Pressure (Δp-v) or Constant Pressure (Δp-c). Constant pressure is ideal for underfloor heating manifolds with dynamic thermoelectric zone actuators, ensuring individual open loops maintain steady balanced flow without whistling or hydraulic noise.
Does the pump come with 1½" rubber sealing washers?
Yes, the Bastion pump includes high-grade EPDM sealing union washers in the box. Always replace old hardened rubber washers during pump changes to guarantee a leak-free seal.
How do you bleed and commission the Bastion circulation pump?
The pump is self-venting through its central rotor chamber. Once the manifold is filled and pressurised to 1.5 bar, power on the pump in high mode for 10 minutes to purge trapped air bubbles before locking into the calibrated flow mode.
Is this pump compliant with UK Building Regulations Part L?
Yes, with an Energy Efficiency Index (EEI) of ≤ 0. 20, it exceeds UK Building Regulations Part L and ErP Eco-Design requirements, consuming up to 80% less electricity than older fixed-speed 3-speed circulators.
Order the Bastion Central Heating Circulating Pump (130mm, 6m Head) with Trade Delivery
Genuine heating and hydronic supplies in stock for immediate dispatch. Backed by full UK manufacturer warranty and dedicated technical support.
Quick Trade Summary: Bastion Central Heating Circulating Pump (130mm, 6m Head)
The Bastion Central Heating Circulating Pump (ZL-3001-25/6) is the UK trade benchmark replacement pump for domestic underfloor heating manifolds and compact boiler circuits. Engineered with standard 130mm port-to-port dimensions and 1½" BSP threaded union connections, it delivers up to 6 metres of dynamic hydraulic head, providing dependable flow across 2 to 10 manifold circuit loops while meeting strict ErP 2015 energy efficiency directives.
Trade Engineering Standards & Hydraulic Application
In hydronic underfloor heating installations, matching the circulation pump's head and volumetric flow rate to circuit pressure drop is essential to prevent cold spots, actuator noise, and premature component wear. The Bastion Central Heating Circulating Pump (130mm, 6m Head) is precision-engineered to British Standard BS EN 1264 and CIBSE hydronic sizing standards, guaranteeing balanced loop flow across modern UK domestic and commercial heating systems.
Engineering Specifications & Technical Standards
| Parameter | Specification Standard |
|---|---|
| Model / SKU | Bastion ZL-3001-25/6 |
| Port-to-Port Length | 130mm (UK Underfloor Heating Manifold Standard) |
| Maximum Delivery Head | 6.0 Metres (0.6 bar hydraulic lift) |
| Maximum Flow Rate (Qmax) | 3.2 m³/h (53.3 Litres/min) |
| Threaded Connection | 1½" BSP Male (Standard 1" BSP Pump Union Nut) |
| Motor Technology | High-Efficiency Permanent Magnet Synchronous Motor (ECM) |
| Energy Efficiency Index (EEI) | EEI ≤ 0.20 (ErP 2015 Part 2 Directive Compliant) |
| Supply Voltage & Frequency | 230V AC ±10%, 50/60 Hz Single Phase |
| Power Consumption Range | 5W (Eco Standby) to 45W (Full 6m Head Load) |
| Operating Fluid Temperature | +2°C to +95°C (Continuous UFH Heating Rating) |
| Maximum Working Pressure | 10 Bar (1.0 MPa Static PN10 Rating) |
| Ingress Protection Rating | IP44 / Class F Insulation |
| Compliance Standards | BS EN 1264, BS EN 16297-1/3, CE, UKCA Approved |
Step-by-Step Installation & Commissioning Protocol
- Hydraulic Isolation & Depressurisation: Close manifold isolation ball valves and isolate primary boiler feeds before loosening union nuts. Have a trade catchment tray ready for residual water.
- Gasket Seating & Mechanical Fit: Inspect flat union mating faces. Insert fresh 1½" EPDM sealing washers. Position pump body strictly with the motor shaft horizontal (never pointing vertically up or down) to ensure water-lubricated bearing longevity.
- Torque Alignment: Tighten 1½" BSP union nuts by hand, then secure with adjustable pump spanners to recommended torque (approximately 45–55 Nm). Do not overtighten or pinch the rubber gasket.
- Electrical Termination: Wire live, neutral, and earth into the manifold wiring centre or 230V room thermostat switched live output. Verify earth continuity in accordance with BS 7671 (IET Wiring Regulations 18th Edition).
- Venting & Air Purging: Fill the manifold circuits loop by loop until flowmeter sight glasses run crystal clear of trapped microbubbles. Power on pump and allow automatic air-venting routine to complete before locking final operational mode.
- Flow Balancing: Calibrate flowmeters on each manifold port according to CIBSE design calculation sheets (typically 1.5 to 2.5 Litres/min per loop depending on loop length).
Frequently Asked Questions: Bastion Central Heating Circulating Pump (130mm, 6m Head)
Will this Bastion pump fit my existing underfloor heating manifold?
Yes, it features the UK industry-standard 130mm port-to-port spacing and 1½" BSP threaded union connections, making it a direct drop-in replacement for Grundfos UPM3 130, Wilo Para 25/6, Dab Evosta, and Reliance manifold blending packs.
What is the difference between a 130mm UFH pump and a 180mm boiler pump?
A 130mm pump has a compact body designed specifically to mount between the flow and return bars of underfloor heating mixing control packs. Standard boiler and cylinder circulating pumps are 180mm long and cannot fit into compact UFH manifold cabinets without extensive pipe reconfiguration.
Which operating curve should I select for underfloor heating loops?
Select Proportional Pressure (Δp-v) or Constant Pressure (Δp-c). Constant pressure is ideal for underfloor heating manifolds with dynamic thermoelectric zone actuators, ensuring individual open loops maintain steady balanced flow without whistling or hydraulic noise.
Does the pump come with 1½" rubber sealing washers?
Yes, the Bastion pump includes high-grade EPDM sealing union washers in the box. Always replace old hardened rubber washers during pump changes to guarantee a leak-free seal.
How do you bleed and commission the Bastion circulation pump?
The pump is self-venting through its central rotor chamber. Once the manifold is filled and pressurised to 1.5 bar, power on the pump in high mode for 10 minutes to purge trapped air bubbles before locking into the calibrated flow mode.
Is this pump compliant with UK Building Regulations Part L?
Yes, with an Energy Efficiency Index (EEI) of ≤ 0. 20, it exceeds UK Building Regulations Part L and ErP Eco-Design requirements, consuming up to 80% less electricity than older fixed-speed 3-speed circulators.
Order the Bastion Central Heating Circulating Pump (130mm, 6m Head) with Trade Delivery
Genuine heating and hydronic supplies in stock for immediate dispatch. Backed by full UK manufacturer warranty and dedicated technical support.
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