The Viessmann Vitodens 200 System DHW Cylinder Connection Locking Caps are essential accessories designed to safely seal unused domestic hot water (DHW) cylinder connections on Vitodens 200 system boilers. These precision‑engineered caps ensure that any non‑active connection points remain fully secure, leak‑free, and protected, supporting optimal boiler operation and long‑term reliability.

Manufactured to Viessmann’s high engineering standards, the locking caps provide a robust and airtight seal, helping maintain correct system pressure and preventing accidental water ingress or escape. Ideal for installations where a DHW cylinder is not required or when connection points must be temporarily secured, these caps offer a simple yet vital safeguard for professional heating system setups.

• Securely seals unused DHW cylinder connections
  Prevents leaks, pressure loss, and contamination within the system.

• Designed specifically for Vitodens 200 system boilers
  Guarantees a perfect fit and full compatibility with Viessmann connection points.

• Robust, durable construction
  Made from system‑rated materials to ensure long‑lasting performance.

• Supports stable boiler operation
  Helps maintain proper hydraulic conditions when DHW connections are not in use.

• Ideal for system‑only installations
  Perfect for setups where no hot water cylinder is fitted.

• Easy to install
  Simple push‑fit or threaded mounting (model dependent).

• Application:
  Sealing unused DHW cylinder connections on Vitodens 200 system boilers

• Function:
  Provides airtight, secure closure to maintain system integrity

• Compatibility:
  Viessmann Vitodens 200 system models (model‑specific compatibility may apply)

• Construction:
  High‑quality, corrosion‑resistant materials designed for heating system environments

• Use Case:

  • System‑only (heating‑only) boiler installations

  • Temporary sealing during maintenance or upgrades

  • Protecting unused DHW ports in plant room setups