This Honeywell 3 port motorised valve head is a genuine product that is perfect for use with your V4073 heating system. It is a high-quality and reliable product that is designed to provide excellent performance for years to come. With a 22mm size, this valve head is easy to install and use, and it is compatible with a range of different heating systems. Whether you are looking for a replacement valve head or a new addition to your heating system, this Honeywell product is a great choice. Its high-quality construction and reliable performance make it a top choice for homeowners and professionals alike. So why wait? Order your Honeywell 3 port motorised valve head today and experience the benefits for yourself!