
Ideal Buffer Tank 25L
Ideal Buffer Tank 25L
The Ideal Buffer Tank 25L is a buffer tank. Compatible with the Ideal Logic Air and HP290 heat pump ranges.
A heat pump needs a minimum volume of water permanently open to it. It uses that volume to reverse the cycle and defrost the outdoor coil, and it needs it to keep modulating smoothly rather than short cycling when zone valves close. Radiators behind thermostatic valves and underfloor loops behind actuators do not count towards it, which is why most systems need a buffer added.
Specification
| Capacity | 25 litres |
| Connections | 1" and 1¼" |
| Maximum pressure | 6 bar |
| Ideal product code | AH700436 |
What it works with
Part of the Ideal heat pump system:
- Heat pumps — Ideal Logic Air 4.0kW Air Source Heat Pump, Ideal Logic Air 5.0kW Air Source Heat Pump, Ideal HP290 4.5kW Air Source Heat Pump, Ideal HP290 6.0kW Air Source Heat Pump and the rest of the heat pump range
Additional suggested items
Usually bought at the same time:
- Ideal Buffer Tank 50L — the larger buffer, for systems with more zoning
- Ideal Magnetic Filter — captures the magnetite a strainer cannot, protecting the plate heat exchanger
Any datasheets we hold for this part are in the Documents tab below. Contact our sales team at sales@clearraysolar.com for trade pricing.
Stocked lines ordered before 2pm go out for next-day delivery. UK mainland is typically 1-2 business days, with the Highlands and Islands taking a little longer.
Unused items in their original packaging can be returned within 14 days of delivery. Get in touch first and we'll arrange collection or send a return label.
Yes. Installers get trade rates, and pallet or project quantities are quoted individually - contact us with your requirements.
Prices are displayed ex VAT with the inc VAT figure alongside, so trade customers see the number they work from and everyone can check the total.
Send us the roof layout, the output you're targeting and any existing equipment, and our team will spec a compatible system and flag anything needing G98 or G99 notification.
Larger orders ship palletised on a tail-lift vehicle. Someone needs to be on site to receive it, and delivery is kerbside unless arranged otherwise.
Build your complete solar system
Everything you need in one place.
- Inverters
- Batteries
- Mounting Systems
- Cabling & Accessories
- Protection Devices
Delivery times vary by region:
- UK — 1-2 business days
- Highlands & Islands — 1-2 business days
Returns accepted within 14 days of delivery for unused items in original packaging.

