The Roth QUADROLINE series is built for modern heating systems, especially heat pumps. This range gives installers reliable hot water storage and heating buffer tanks in two practical sizes: 325 liters and 500 liters. Whether you need a dedicated domestic hot water tank or a buffer with a built-in hydraulic separator, the Quadroline line keeps things simple. The tanks are designed to work smoothly with low-temperature systems, save space in mechanical rooms, and deliver steady performance year after year.

Optimized for Heat Pump Performance

Heat pumps run best at lower flow temperatures, and the Roth Thermotank Quadroline tanks are made to match that need. The hot water models (TQ-TW) keep your domestic water ready when you need it, while the buffer models (TQ-T) store heat from the pump and distribute it evenly. The hydraulic separator in the buffer tanks takes the guesswork out of piping. It balances flow between the heat pump and the heating circuit, reduces pump wear, and makes system commissioning faster and more reliable.

Flexible Storage for Every Job

With 325-liter and 500-liter options, you can pick the right size for single-family homes or larger residential projects. The hot water tanks feature efficient internal heat exchangers that recover heat quickly without long wait times. The buffer tanks come with a hydraulic coupling that simplifies connections and prevents short cycling. Both types are built with durable materials and clear connection points, so you can mount them, hook up the pipes, and move on without extra fittings or custom parts.

Quick-Install Thermal Jackets

Saving time on site matters, and the Roth TQ thermal jackets do exactly that. Made from tough PVC with 30 mm of integrated PS insulation, these covers fit the 325-liter and 500-liter tanks perfectly. Each jacket comes with a ready-made lid, so you skip the messy foam or fiberglass wrapping. They snap or slide into place, cut down on heat loss, keep the tank surface clean, and help the system run at peak efficiency. No special tools or extra sealing steps are needed.

Built for Installers, Made to Last

The QUADROLINE series focuses on what matters most on the job site: straightforward installation, solid build quality, and long-term reliability. The tanks are designed to handle standard plumbing connections, resist corrosion, and maintain performance even after years of use. By choosing Roth Thermotank Quadroline, you reduce callbacks, simplify system balancing, and deliver a clean, efficient setup that homeowners and heat pump manufacturers trust.