
Hyco Manufacturing SF4KIT Speedflow Expansion Vessel, Check Valve & Pressure Reducing Valve 2Ltrs 3.5bar
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Hyco SF4KIT Speedflow Expansion Vessel, Check Valve & Pressure Reducing Valve – 2L, 3.5bar
The Hyco SF4KIT is an essential accessory designed for use with small unvented water heaters, like the Hyco Speedflow unit. This kit efficiently manages the expansion of hot water and addresses high water pressure in certain areas. The SF4KIT includes a 2-litre expansion vessel, a check valve to prevent hot water from re-entering the cold water supply, and a pressure reducing valve, ensuring smooth and safe operation in high-pressure regions.
- Expansion Vessel: The 2-litre expansion vessel effectively manages the expansion of hot water, protecting your water heater and system from damage.
- Check Valve: The check valve prevents expanded hot water from flowing back into the cold water supply, ensuring a safe and efficient system.
- Pressure Reducing Valve: Included pressure reducing valve caters to high water pressure areas, providing additional protection and maintaining consistent water flow.
- For Small Unvented Heaters: Specifically designed for use with small unvented water heaters like the Hyco Speedflow unit, ensuring compatibility and reliable performance.
- Pressure Rating: The kit is rated for 3.5 bar, providing optimal pressure control and safety for your water heating system.
Technical Specification
- Expansion Vessel Capacity: 2L
- Pressure Rating: 3.5 bar
- Kit Includes: Expansion vessel, check valve, and pressure reducing valve
- Application: Suitable for small unvented water heaters like the Hyco Speedflow unit
✅ Ensure safe and efficient operation with the Hyco SF4KIT, the perfect solution for managing water expansion and high-pressure conditions!

Range | Hyco Speedflow |
Product | Water Heating |
Type | Expansion Vessel, Check & Pressure Valve |
Delivery Options:
- PRIORITY DELIVERY – Next Working Day (All items in stock and ordered before 3 pm) - £7.08 inc-VAT. (£5.90 ex-VAT)
- Orders Over £100 (before VAT): We offer free standard shipping on all orders shipped to UK mainland addresses
- Orders under £100 (before VAT): Our standard delivery fee to UK mainland addresses is £5.90 ex-VAT (£7.08 inc-VAT)
*Delivery charges to JE, GY, TR, BT, IM, IV, HS, KW, ZE and certain PA post codes are £12 ex-VAT for all orders (Prices subject to change).
Items requiring specialist shipping:
- Orders containing Solar Panels, Batteries and/or Inverters: Up to 50 qty will be dispatched on a pallet and incur a £120 ex-VAT delivery charge**.
**Delivery charges to JE, GY, TR, BT, IM, IV, HS, KW, ZE and certain PA post codes are £180 ex-VAT (Prices subject to change).
Contact us if you have any further questions.